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Known Faults Database

Audi A6 problems, reliability and years to avoid

If you are considering buying a used Audi A6, these are the common problems worth knowing about first. Our garage database tracks 26 known faults for this model, 23 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.

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Is the Audi A6 reliable?

The Audi A6 has 26 known faults in our database across 3 generations, 23 of them rated high severity. The most serious are fuel system (manufacturer recall to replace Siemens Piezoelectric injectors on 2.0 TDI PD engines) and engine (the 3.0 TDI V6 engine is prone to water pump failure). None of them makes the car a bad buy on its own; the risk is a seller who knows and says nothing.

That is a count of the faults we hold, not a reliability score. Popular cars get written about more, and a newer generation has had less time to show its faults.

Which Audi A6 years should you avoid?

No year is a write-off on its own. What matters is which serious faults a given year and engine can have, and whether the car in front of you has had them fixed.

C5, 1997 to 20044 high severity
4 known faults, the serious ones in the electrics, gearbox, suspension
C6, 2004 to 201111 high severity
12 known faults, the serious ones in the fuel system, engine, gearbox, electrics
C7, 2011 to 20188 high severity
10 known faults, the serious ones in the engine, gearbox, electrics

Years and engines with a serious known fault

  • 2006 to 2009, 2.0 TDI PD (BMN and related codes) with Siemens piezo injectors: manufacturer recall to replace Siemens Piezoelectric injectors on 2.0 TDI PD
  • 2004 to 2015, 3.0 TDI V6: the 3.0 TDI V6 engine is prone to water pump failure
  • 2007 to 2017, EA888 2.0 TFSI: recall issued for the additional coolant pump on EA888 2.0 TFSI engines
  • 2004 to 2011, 2.0 TDI Multitronic Automatic: problems with 2.0 TDI Multitronic models stalling
  • 2004 to 2011, All Avant models: the screenwash pipe to the rear wash-wipe can leak over the MMI
  • 2011 to 2018, 3.0 TDI with S-Tronic Automatic: problems reported with lack of smoothness and control of the S-Tronic gearbox

Each one is set out in full below, with the symptoms, the typical mileage and a rough repair cost.

Generation 1 of 34 known faults · 2 owner reports · 7 good notes

Audi A6 C5 (1997 to 2004) problems

ElectricalHigh severity📝 Editorial

Blocked bulkhead ventilation plenum chamber drains can lead to water ingress into the cabin, causing electrical and electronic problems, and potentially brake servo failure leading to engine hydrolock.

Rough guide
£500-2000+

Typical symptoms

  • Damp carpets or water in footwells
  • Intermittent electrical faults (e.g., windows, instruments)
  • Hard brake pedal or loss of servo assistance
  • Engine misfire or failure (in extreme cases)

Affected vehicles

Engines:
All variants
Typical mileage:
Any mileage miles
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Transmission/ClutchHigh severity📝 Editorial

The transmission of the RS6 is prone to failure after 50,000 miles, with very high replacement costs.

Rough guide
£7000+

Typical symptoms

  • Harsh gear changes or slipping
  • Loss of drive or limp mode
  • Unusual noises from the gearbox

Affected vehicles

Engines:
RS6 Transmission
Typical mileage:
50000+ miles
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SuspensionHigh severity📝 Editorial

The Dynamic Ride Control (DRC) system on RS6 models is prone to leaking dampers, a problem acknowledged by Audi. An 'enhanced support package' was offered for 6 years/120k miles for Audi dealer-maintained cars.

Rough guide
£1000-3000+

Typical symptoms

  • Leaking fluid from dampers
  • Poor ride quality or handling
  • Uneven ride height

Affected vehicles

Engines:
RS6 Dynamic Ride Control (DRC) Suspension
Typical mileage:
Unknown miles
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SuspensionHigh severity📝 Editorial

Frequent failure of air suspension bladders, which are integral to the struts and expensive to replace. Replacements may not last long. Leaks often occur when raised to high ride height.

Rough guide
£700-3000 (per corner or all four)

Typical symptoms

  • One or more corners of the car sagging
  • Compressor running excessively
  • Air suspension warning light
  • Car failing to reach desired ride height

Affected vehicles

Engines:
Air Suspension System
Typical mileage:
Unknown miles
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What owners report on the C5

2 single reports, unconfirmed

One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.

  • General · December 2014Warranty Direct's claims data placed the 2000-2005 Audi A6 Allroad as the third least dependable SUV in its records.
  • General · December 2012A 2000-2007 A6 Allroad was rated the sixth most likely car to suffer expensive problems in a 2012 reliability index.

What owners like about the C5

7 notes
  • This Audi A6 offers good handling with decent grip, and the 2.4 30-valve V6 engine provides powerful performance.
  • The re-engineered A6 from summer 2001 offered wider availability of the Multitronic gearbox and a tax-efficient 130 TDI PD engine.
  • The 2002 RS6 A6 saloon and Avant models featured Dynamic Ride Control, which effectively counteracts vehicle movements during cornering.
  • From June 2003, 2.5 litre 163bhp and 180bhp TDI engines became Euro 4 compliant, resulting in a 3% diesel BIK penalty saving.
  • A 2003 survey rated the A6 as one of the most affordable 'luxury' cars to operate, with average breakdown rates.
  • The RS6 Plus Avant, launched in April 2004, was a final edition model with 480bhp and impressive acceleration figures.
  • The A6 Allroad features classy styling and useful height-adjustable suspension, performing surprisingly well both on and off-road.
End of the C5 section.Pick another year ↑Check a Audi A6 advert →
Generation 2 of 312 known faults · 9 owner reports · 3 good notes

Audi A6 C6 (2004 to 2011) problems

Engine/EmissionsHigh severity📝 Editorial

Oil pump balancer shaft hex drive rounds off, causing sudden loss of oil pressure and complete engine destruction

Rough guide
£1500-3000

Typical symptoms

  • red low oil pressure warning on dash
  • loud metallic grinding from the bottom of the engine
  • sudden turbo failure

Affected vehicles

Engines:
2.0 TDI PD (Engine Code BLB / BRE)
Typical mileage:
60000-100000 miles
3 more owner reports back this up
  • October 2013A 2008 A6 2.0 TDI experienced repeat oil pump drive failures, costing £3,500 for the first repair and a warranty claim refusal for the second.
  • February 2013A 2.0 TDI Avant experienced oil pump failure at 60,000 miles, leading to turbocharger damage, but was fixed for £1,000 with contributions.
  • January 2011A 2.0 TDI Multitronic A6 experienced oil pump seizure and turbo failure at 112,000 miles, costing £840 for the pump and £770 for the turbo.
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Transmission/ClutchHigh severity📝 Editorial

Multitronic CVT gearbox clutch pack wear and TCM failure causing juddering and total loss of drive

Rough guide
£1500-3500

Typical symptoms

  • juddering or shaking when pulling away from a standstill
  • PRNDS display flashing on the dashboard
  • car refuses to shift out of park or neutral

Affected vehicles

Engines:
All Front-Wheel-Drive Autos
Typical mileage:
60000-100000 miles
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Engine/EmissionsHigh severity📝 Editorial

Timing chain tensioner failure causing severe rattling; chains are located at the rear of the engine, requiring engine removal to fix. This is wear in the tensioner and chain drive itself, which is a high mileage failure, and is a separate job from the camshaft wear reported on the C7 A6 Allroad at much lower mileage

Rough guide
£2000-4000

Typical symptoms

  • loud metallic slapping/rattling from the back of the engine on cold start
  • rattle persisting for more than 3 seconds
  • engine management light

Affected vehicles

Engines:
3.0 V6 TDI (chain tensioner)
Typical mileage:
80000-140000 miles
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Engine/EmissionsMedium severity📝 Editorial

EGR valve failure and DPF blockage frequently occurring after the 'Dieselgate' emissions software update

Rough guide
£400-900

Typical symptoms

  • flashing glow plug light
  • engine management light
  • limp mode (loss of power)
  • excessive DPF regenerations

Affected vehicles

Engines:
2.0 TDI (EA189)
Typical mileage:
60000-100000 miles
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Fuel SystemHigh severity💬 6 owner reports, 2011 to 2012

Manufacturer recall to replace Siemens Piezoelectric injectors on 2.0 TDI PD engines (e.g., BMN code) from 2006-2009. A short circuit within the injectors can cause the fuel system to shut down and the engine to cut out. All four injectors are replaced free of charge. The engine is the 170PS PD unit: in the Audi range it is confirmed on the A3 8P (BMN) and the A4 B7 (BRD, including the B7 Cabriolet). The common-rail 2.0 TDI (CEGA) that replaced the PD engine from 2009 is not affected, and neither are the 2.0 TDIs that were common-rail from the day they arrived, so check the engine code on the V5C or the cambelt sticker before assuming a car is covered.

Rough guide
£0 (free recall)

Typical symptoms

  • Engine cutting out unexpectedly
  • Loss of power
  • Engine management light illuminated
  • Rough running or misfires

Affected vehicles

Engines:
2.0 TDI PD (BMN and related codes) with Siemens piezo injectors
Typical mileage:
Any miles
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Engine/EmissionsHigh severity💬 5 owner reports, 2011 to 2013

The 3.0 TDI V6 engine is prone to water pump failure and coolant loss from the water-cooled EGR valve. This can lead to overheating and significant repair bills.

Rough guide
£250-1200

Typical symptoms

  • Coolant loss
  • Engine overheating
  • Warning lights on dashboard
  • Reduced heater performance

Affected vehicles

Engines:
3.0 TDI V6
Typical mileage:
95000+ miles
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Transmission/ClutchHigh severity📝 Editorial

Widespread problem with dual mass flywheels (DMFs) on 2.0 TDI manual models, leading to stalling and clutch failure, often by 45,000 miles.

Rough guide
£1200-1500

Typical symptoms

  • Stalling, especially when pulling away
  • Juddering or vibration when engaging clutch
  • Clutch pedal feeling spongy or inconsistent
  • Rattling noise from gearbox area

Affected vehicles

Engines:
2.0 TDI Manual
Typical mileage:
45000 miles
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Transmission/ClutchHigh severity💬 3 owner reports, 2012 to 2013

Problems with 2.0 TDI Multitronic models stalling, potentially due to incompatibility between the emissions system and engine braking on descents. Also, EGR valve failure can cause loss of power and noise.

Rough guide
£500-2000+

Typical symptoms

  • Engine stalling, especially on descents or at low speeds
  • Loss of power
  • Unusual noises from the engine bay
  • Engine management light illuminated

Affected vehicles

Engines:
2.0 TDI Multitronic Automatic
Typical mileage:
Unknown miles
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ElectricalHigh severity💬 3 owner reports, 2012

The screenwash pipe to the rear wash-wipe can leak over the MMI (Multi Media Interface) unit, located in the nearside boot area, causing it to fail. An Audi TSB (92B8) exists for this repair.

Rough guide
£850-1000

Typical symptoms

  • MMI unit (Sat Nav, Phone, Radio, CD) not working
  • Water visible in the nearside boot area
  • Rear wash-wipe not functioning correctly

Affected vehicles

Engines:
All Avant models
Typical mileage:
Unknown miles
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Engine/EmissionsHigh severity💬 2 owner reports, 2011 to 2012

Timing chain failures reported on 3.2 V6 FSI petrol engines, especially under Longlife service regimes. Chains are at the rear of the engine, requiring engine removal for repair.

Rough guide
£2000-4000+

Typical symptoms

  • Loud metallic rattling noise from the rear of the engine, especially on cold start
  • Engine management light illuminated
  • Rough running or misfires
  • Complete engine failure if ignored

Affected vehicles

Engines:
3.2 V6 FSI Petrol
Typical mileage:
Unknown miles
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Engine/EmissionsHigh severity💬 2 owner reports, 2012 to 2013

Swirl flap motor failure in both inlet manifolds of the 2.7 TDI V6 engine. Individual swirl flaps can also break, though ingestion into the engine is not reported. Audi was reportedly developing a fix to avoid full manifold replacement.

Rough guide
£1100-1500

Typical symptoms

  • Engine management light illuminated
  • Loss of power or hesitation
  • Rough idling or uneven running
  • Unusual noises from the engine bay

Affected vehicles

Engines:
2.7 TDI V6
Typical mileage:
Unknown miles
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Engine/EmissionsHigh severity💬 2 owner reports, 2018

Timing chain failure reported on the 2.7 V6 TDI engine, leading to severe engine damage. Chains are located at the rear of the engine, requiring engine removal for repair.

Rough guide
£2000-4000+

Typical symptoms

  • Loud metallic rattling noise from the rear of the engine, especially on cold start
  • Engine management light illuminated
  • Rough running or misfires
  • Complete engine failure if ignored

Affected vehicles

Engines:
2.7 V6 TDI
Typical mileage:
118000-204000 miles
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What owners report on the C6

9 single reports, unconfirmed

One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.

  • Electrics · January 2020Mapping updates for the satnav in an A6 after three years must be performed by a franchised Audi dealer at a charge.
  • Engine · July 2018A 2008 A6 2.0 TDI 140 Multitronic Auto suffered engine damage due to excessive oil from repeated DPF regeneration on short runs.
  • Engine · February 2018A 2009 A6 with an EA888 2.0 TFSI engine experienced timing chain failure at 98,000 miles.
  • Gearbox and clutch · July 2016A 2010 A6 3.0 TDI Quattro developed a severe drivetrain judder between 1,600 and 2,000rpm, possibly due to the Haldex centre differential.
  • Electrics · May 2016A 2009 A6 2.0 TDI at 107,000 miles had electrical problems with the passenger door, refusing to open via remote or driver's switch.
  • Electrics · November 2013A 2011 Audi Allroad suffered continuous bleeping from its rear parking sensors in damp conditions, which multiple dealers could not fix.
  • Suspension and steering · August 2013Multi-variable air suspension rear dampers may leak after approximately six years, and replacements are very expensive.
  • Brakes · December 2012A two-year-old A6 Avant 3.0 TDI Tiptronic Quattro repeatedly warped front brake discs, with juddering starting after about 3,000 miles.
  • Suspension and steering · September 2012Rear dampers on 3.0 V6 TDI Quattro models appear to be failing, with Audi dealers quoting £750 per side for replacement.

What owners like about the C6

3 notes
  • The A6 achieved a 5-star NCAP crash test rating for adult protection and a 4-star rating for child protection.
  • The A6 Avant was recognised as the first 'World Car of the Year' in February 2005, highlighting its quality and design.
  • The A6 Allroad provides a very comfortable driving experience, whether on paved roads or off-road terrain.
End of the C6 section.Pick another year ↑Check a Audi A6 advert →
Generation 3 of 310 known faults · 10 owner reports · 11 good notes

Audi A6 C7 (2011 to 2018) problems

Engine/EmissionsHigh severity💬 4 owner reports, 2017

Recall issued for the additional coolant pump on EA888 2.0 TFSI engines. Foreign particles in the coolant can block the pump, causing it to overheat. The fix involves a software update to deactivate the pump if a malfunction occurs, and replacement if it has already failed.

Rough guide
£0 (free safety recall)

Typical symptoms

  • Engine overheating
  • Coolant pump malfunction warning
  • Loss of coolant

Affected vehicles

Engines:
EA888 2.0 TFSI
Typical mileage:
Any miles
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ElectricalHigh severity💬 2 owner reports, 2012 to 2017

Reports of total electrical failure and repeated steering malfunctions, including loss of power assistance to steering and brakes, and the car going straight ahead when turning the wheel. Often linked to communication problems with internal systems or steering control unit.

Rough guide
£1000-3000+

Typical symptoms

  • Total loss of electrical power while driving
  • Loss of power steering and brake assistance
  • Steering wheel turning but car not responding
  • Warning lights related to steering or electrical systems

Affected vehicles

Engines:
All variants
Typical mileage:
Unknown miles
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Transmission/ClutchHigh severity💬 3 owner reports, 2013 to 2020

Problems reported with lack of smoothness and control of the S-Tronic gearbox, particularly when reversing, and clutch judder in 1st gear on take-off, especially when warm or on a hill.

Rough guide
£1500-3000+

Typical symptoms

  • Juddering or vibration when pulling away in 1st gear or reverse
  • Lack of smooth engagement when reversing
  • Harsh or inconsistent gear changes
  • Transmission warning messages (e.g., 'Gearbox overheating')

Affected vehicles

Engines:
3.0 TDI with S-Tronic Automatic
Typical mileage:
10000-30000 miles
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ElectricalMedium severity💬 2 owner reports, 2016

Amplifier failure reported, sometimes after other electrical repairs (e.g., central locking), leading to loss of radio and Bluetooth phone functionality. Replacement costs are high.

Rough guide
£1800-2200

Typical symptoms

  • No sound from radio or media system
  • Bluetooth phone connectivity issues
  • MMI system freezing or unresponsive

Affected vehicles

Engines:
All variants with MMI/Audio System
Typical mileage:
Unknown miles
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Transmission/ClutchHigh severity💬 2 owner reports, 2016 to 2019

Problems reported with Multitronic gearboxes, especially when cold and pulling away uphill, where revs rise but the car doesn't move, then jumps forward or stalls. This can occur even after transmission fluid changes.

Rough guide
£1500-3000+

Typical symptoms

  • Engine revs rising without corresponding vehicle movement
  • Car jumping forward or stalling when pulling away uphill from cold
  • Juddering or hesitation during low-speed maneuvers

Affected vehicles

Engines:
Multitronic Automatic
Typical mileage:
60000 miles
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Engine/EmissionsHigh severity💬 3 owner reports, 2017

After the EA189 NOx emissions software update, owners reported increased engine revs, higher fuel consumption, DPF warnings, and blocked EGR valves. This suggests the fix negatively impacted engine efficiency and emissions system longevity.

Rough guide
£500-1500 (EGR/DPF)

Typical symptoms

  • Engine revving 200-300rpm higher for the same journey
  • Increased fuel consumption
  • DPF warning lights appearing frequently
  • Engine management light permanently lit (blocked EGR)
  • Loss of power or limp mode

Affected vehicles

Engines:
2.0 TDI (EA189) after NOx Emissions Fix
Typical mileage:
Unknown miles
1 more owner report backs this up
  • November 2016After a NOx defeat software upgrade, a 2013 A6 Avant 2.0 TDI saw its fuel economy drop from 52-60 MPG to 38-43 MPG.
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OtherMedium severity💬 2 owner reports, 2016 to 2019

Leaking panoramic glass sunroofs reported on A6 Allroad models, even when drains are clear, suggesting a crack in the fitting or roof structure.

Rough guide
£500-1500+

Typical symptoms

  • Water ingress into the cabin, especially on the driver's side
  • Damp headlining or pillars
  • Musty smell inside the car

Affected vehicles

Engines:
All variants with Panoramic Sunroof
Typical mileage:
Unknown miles
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Engine/EmissionsHigh severity💬 3 owner reports, 2017 to 2018

Camshaft wear on the 3.0 V6 TDI in the C7 Allroad, heard as engine noise and needing the engine stripped down to put right. Owners have reported it early in the car's life: a camshaft repaired under warranty at 37,000 miles on a 2015 car, and four new camshafts wanted at 40,000 miles on another. It can come back as a second engine-out job later on, and the same 2015 car needed timing chain tensioners at 77,000 miles, by then out of warranty and quoted at around £5,000.

Rough guide
£2000-5000+

Typical symptoms

  • Engine noise (rattle, clatter)
  • Engine management light illuminated
  • Loss of power or rough running

Affected vehicles

Engines:
3.0 V6 TDI (camshafts, Allroad)
Typical mileage:
37000-40000 miles
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ElectricalHigh severity💬 2 owner reports, 2019

Simultaneous failure of Adaptive Cruise Control (ACC) and auto braking, alongside satnav showing incorrect location. Satnav fault often linked to water ingress into the shark's fin GPS aerial.

Rough guide
£500-1500+

Typical symptoms

  • ACC and auto braking systems not functioning
  • Satnav displaying incorrect vehicle location
  • Warning lights related to ACC or navigation

Affected vehicles

Engines:
All variants with ACC/Satnav
Typical mileage:
Unknown miles
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Transmission/ClutchHigh severity💬 2 owner reports, 2019

Intermittent judder reported from the drivetrain of 2.0 TDI manual models, suspected to be a dual mass flywheel (DMF) problem. Dealers may charge for extensive investigation before quoting for a fix.

Rough guide
£1200-2000+

Typical symptoms

  • Intermittent judder or vibration from the drivetrain
  • Judder noticeable when pulling away or changing gears
  • Unusual noises from the gearbox area

Affected vehicles

Engines:
2.0 TDI Manual
Typical mileage:
Unknown miles
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What owners report on the C7

10 single reports, unconfirmed

One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.

  • Gearbox and clutch · July 2019A 2015 2.0 litre A6 SE TDI Ultra experienced catastrophic manual gearbox failure at 80,000 miles, resulting in a £4,000 repair bill.
  • Brakes · November 2018A 2014 A6 Allroad suffered from a persistent brake squeal since new, still present at 18,000 miles, likely due to metal particles in the pads.
  • Brakes · October 2018A September 2016 Audi 3 litre A6 Avant required new front brake pads and discs at both 17,000 and 29,000 miles.
  • Exhaust · November 2017A 24,000-mile 2014 A6 Allroad experienced complete emissions system failure while towing, requiring a €4650 repair for DPF, EGR, and Lambda sensor.
  • Engine · March 2017A 2011 A5 2.0 TDI S line experienced a sudden jerk, loss of power, and flashing engine management light at 70mph.
  • Electrics · August 2016Apple's latest iOS upgrade rendered iPhones incompatible with the Audi Music Interface system in A6 models up to 2015.
  • Interior · April 2016The driver's seat of a 2015 A6 Avant developed a creaking noise, diagnosed as worn seat rail bearings and broken seat bases.
  • Fuel system · December 2015The armoured rubber fuel pipe of a 40,000-mile 2012 A6 3.0 TDI split, spraying diesel throughout the engine compartment.
  • Engine · October 2015A 2015 A6 Avant 3.0 TDI at 18,000 miles had an unexplained engine rattle; Audi initially suspected the timing chain but then could not identify the cause.
  • Engine · October 2013A 2012 A6 2.0 TFSI at 15,600 miles consumed 1.75 litres of oil in 5,800 miles, which the dealer stated was within Audi's 'normal' limits.

What owners like about the C7

11 notes
  • The A6 achieved a 5-star Euro NCAP result, with high scores for adult and child occupant protection and safety assist features.
  • The A6 was voted the most reliable new Luxury car in a 2013 'Which?' survey, indicating strong owner satisfaction.
  • The A6 Allroad is lighter and more economical than previous versions, offering improved efficiency for drivers.
  • The A6 Allroad is available with the powerful 3.0 BiTDI engine, providing strong performance for various driving conditions.
  • The A6 Allroad features a superb quality interior, offering a premium and comfortable cabin experience for occupants.
  • The A6 Allroad provides a refined and smooth ride, ensuring comfort for both short journeys and long-distance travel.
  • The A6 Avant features a premium interior with ample space, providing a comfortable and luxurious cabin environment.
  • All engines in this A6 Avant model incorporate mild hybrid technology, which helps to improve overall fuel consumption.
  • The 2018 A6 Avant achieved a five-star Euro NCAP rating, with high scores for adult and child occupant protection.
  • The A6 features a premium interior equipped with advanced technology, enhancing the driving experience for occupants.
  • This A6 model offers more interior space compared to its predecessor, providing increased comfort for passengers.
End of the C7 section.Pick another year ↑Check a Audi A6 advert →

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Audi A6 recalls

Recall work is done by the manufacturer, and GOV.UK says you will not usually have to pay for it. These are the 27 DVSA recalls for the A6, newest first. They do not tell you whether this particular car has had the work: for that, put the registration into the free GOV.UK MOT history check, which shows a recall status where the manufacturer shares it, or ask a franchised dealer to check the VIN.

🏛️ November 2025Cars built March 2025 to April 2025

Belt buckle rivet missing

On affected vehicles an important connection in the seat belt buckle may not have been produced correctly during the assembly process.

Put right by: The belt buckles on both front seats (left and right) must be replaced.

DVSA R/2025/5084 vehicles affected in the UK
🏛️ October 2025Cars built February 2021 to June 2024

Software update for battery control unit

On affected vehicles there may be defective battery modules which may result in a fire hazard when charging the high-voltage battery.

Put right by: Update the software of the high-voltage battery to improve the self-diagnosis capabilities. Vehicle owners are advised to not charge the high-voltage battery using external charging sources and also not use the e-tron modes "Battery charge" and "Battery hold" until the update is applied.

DVSA R/2025/4631,458 vehicles affected in the UK
🏛️ August 2025Cars built July 2004 to December 2010

Stop-drive TAKATA PSAN

Urgent Safety Warning - Do Not Drive Your Vehicle Affected vehicles were originally allocated to or used for an extended period of time in a region with a climate zone considered to as HIGH RISK. Certain front airbags contain an ageing inflator propellant that may explode when deployed due to long-term exposure to heat and humidity. If the airbag inflator explodes metal fragments may be ejected causing life-threatening or fatal injuries to anyone in the vehicle.

Put right by: Affected airbags will be be replaced. You can contact Audi's dedicated Takata Stop Drive helpline at 0113 526 9646 (MONDAY to FRIDAY 9:00AM to 5:00PM.

DVSA R/2025/38774 vehicles affected in the UK
🏛️ December 2024Cars built March 2021 to October 2022

Servicing high-voltage battery

On affected vehicles battery modules may become defective over the course of the vehicle's service life. This may result in a fire hazard when charging the high-voltage battery with the associated risk of severe or fatal injuries to people inside and/or outside the vehicle as well as significant material damage. To minimise this risk do not charge the high-voltage battery using an external charging source. In addition do not use the e-tron modes "Battery charge" and "Battery hold" (refer to Owner's Manual) until further notice.

Put right by: Replace the defective modules. Further software fix being developed to improve monitoring.

DVSA R/2024/495596 vehicles affected in the UK
🏛️ April 2024Cars built March 2004 to August 2011

Replacing Takata passenger airbag

On affected vehicles the passenger airbag may in extremely rare cases be overloaded and even burst when the passenger airbag is triggered. If this were to happen small metal parts could become dislodged from the housing and potentially cause life-threatening injury to a vehicle occupant.

Put right by: For safety reasons it is necessary to check the passenger airbag and if required to replace the airbag module.

DVSA R/2024/15874,226 vehicles affected in the UK
🏛️ October 2023Cars built July 2023 to July 2023

On certain vehicles an incorrect bracket for the side airbag was fitted in the left front seat.

On certain vehicles an incorrect bracket for the side airbag was fitted in the left front seat.

Put right by: Replace the side airbag and bracket.

DVSA R/2023/3175 vehicles affected in the UK
🏛️ February 2023Cars built May 2004 to February 2010

If a front airbag is deployed it is possible that the gas generator housing in which the propellant is generated may burst on vehicles manufactured within a limited period.

If a front airbag is deployed it is possible that the gas generator housing in which the propellant is generated may burst on vehicles manufactured within a limited period.

Put right by: As a precautionary safety measure it is necessary to replace the airbag unit on the passenger side.

DVSA R/2023/05313 vehicles affected in the UK
🏛️ January 2023Cars built April 2018 to October 2021

The fuel gauge may not show the drop in fuel level correctly during vehicle operation

The fuel gauge may not show the drop in fuel level correctly during vehicle operation.

Put right by: The tank level sender must be replaced on the affected vehicles.

DVSA R/2023/0275,487 vehicles affected in the UK
🏛️ June 2022Cars built January 2022 to February 2022

Engine control units might be fitted with semiconductor components that do not meet specifications

On a small number of vehicles manufactured within a specific period it is possible that the engine control units were fitted with semiconductor components which do not meet the specifications.

Put right by: The engine control unit must be replaced on the affected vehicles.

DVSA R/2022/169109 vehicles affected in the UK
🏛️ May 2022Cars built May 2012 to March 2017

The mesh size of the oil strainer in the oil supply for both turbochargers is too small

The mesh size of the oil strainer in the oil supply for both turbochargers is too small.

Put right by: The oil strainer will be replaced with a revised version with a larger mesh size.

DVSA R/2022/1324,690 vehicles affected in the UK
🏛️ February 2022Cars built November 2019 to February 2021

Following a previous campaign the toe and/or camber values on the rear axle may in certain circumstances incorrectly be changed without this being noticed

Following a previous campaign the toe and/or camber values on the rear axle may in certain circumstances incorrectly be changed without this being noticed.

Put right by: The wheel alignment must be checked and if necessary the suspension must be serviced on the affected vehicles.

DVSA R/2022/0365,327 vehicles affected in the UK
🏛️ September 2021Cars built April 1997 to December 1999

The deployment of the takata airbag may be delayed or insufficiently powerful due to a potential reduction in the performance of the gas generator

On vehicles with TAKATA driver airbag and NADI gas generator manufactured within a specific period it is possible that the function of the driver airbag may be restricted due to its age.

Put right by: The driver airbag unit must be checked on the vehicles affected and the gas generator must be replaced if necessary

DVSA R/2021/23457,169 vehicles affected in the UK
🏛️ September 2021Cars built January 2000 to August 2001

Function of the driver airbag might be restricted due to its age

On vehicles with 3-spoke steering wheel manufactured within a specific period the function of the driver airbag may be restricted due to its age.

Put right by: The gas generator in the driver airbag must be replaced on the affected vehicles.

DVSA R/2021/3309,536 vehicles affected in the UK
🏛️ June 2021Cars built November 2019 to February 2021

Rear axle suspension links nuts do not meet specifications

One or more nuts which do not meet the specifications may have been fitted on the rear axle suspension links.

Put right by: The affected nuts on the rear axle will be replaced on affected vehicles.

DVSA R/2021/23610,089 vehicles affected in the UK
🏛️ March 2021Cars built February 2018 to December 2020

The front passenger airbag might not inflate fully in the event of an accident

In the event of an accident requiring the vehicles front passenger airbag to be activated the airbag might not inflate fully.

Put right by: The dash panel must be checked on the affected vehicles and repaired or replaced if required

DVSA R/2021/1171,298 vehicles affected in the UK
🏛️ December 2020Cars built July 2020 to September 2020

Faulty crash sensors for airbag/restraint systems may have been fitted in both of the front doors

Faulty crash sensors for airbag / restraint systems may have been fitted in both of the front doors.

Put right by: The crash sensors for the side airbags (front) must be checked on the vehicles affected and replaced if necessary.

DVSA R/2020/37231 vehicles affected in the UK
🏛️ October 2020Cars built August 2018 to March 2020

Moisture may enter the belt driven starter-alternator

It is possible that moisture may enter the belt-driven starter-alternator.

Put right by: The starter-alternator must be replaced on the affected vehicles.

DVSA R/2020/26511,936 vehicles affected in the UK
🏛️ June 2020Cars built June 2017 to March 2020

Moisture may enter the belt-driven starter-alternator

It is possible that moisture may enter the belt-driven starter-alternator.

Put right by: The starter-alternator must be replaced on the affected vehicles.

DVSA R/2020/13834,982 vehicles affected in the UK
🏛️ June 2019Cars built December 2015 to December 2018

The locking mechanism in the hinged towing bracket could be faulty

Hinged towing bracket on which the locking mechanism in the hinge module could be faulty.

Put right by: The hinge module for the towing bracket must be checked and replaced if required.

DVSA R/2019/175135 vehicles affected in the UK
🏛️ March 2019Cars built February 2014 to September 2016

Fuel may escape from one or both fuel rails

It is possible that fuel may escape from one or both fuel rails (low-pressure side).

Put right by: The fuel rails for the low-pressure side of both cylinder banks must be replaced on the affected vehicles.

DVSA R/2019/0992,763 vehicles affected in the UK
🏛️ February 2019Cars built July 2014 to October 2014

The auxiliary heater element in the air conditioner may fail

The auxiliary heater element connection in the air conditioner may fail.

Put right by: Check the auxiliary heater connector and replace the element if required.

DVSA R/2019/0604,907 vehicles affected in the UK
🏛️ December 2018Cars built July 2018 to October 2018

Rear fixed glass lid bonding may not meet correct specification

There is a possibility that the glass bonding on the panoramic sunroof is not bonded correctly.

Put right by: Replace the affected glass section with new bonding.

DVSA R/2018/36359 vehicles affected in the UK
🏛️ May 2017Cars built May 2011 to October 2016

Coolant pump may overheat

Foreign particles in the engine coolant can lead to a blockage in the additional coolant pump and cause the pump to overheat.Foreign particles in the coolant can lead to a blockage in the additional coolant pump and cause the pump to overheat.

Put right by: Recall the machines that are likely to be affected and update the software which will deactivate the additional coolant pump in the event of malfunction. If there has been a malfunction of the additional water pump it will be replaced.

DVSA R/2017/1152,844 vehicles affected in the UK
🏛️ February 2017Cars built May 2016 to October 2016

Airbag/belt tensioners may not trigger in event of an accident

Due to an error in the manufacturing process the air bag and/or seat belt pretensioner may not trigger in the event of a collision

Put right by: On affected vehicles replace air bag assembly and seta belt pretensioner where necessary.

DVSA R/2017/0782,622 vehicles affected in the UK
🏛️ April 2015Cars built April 2011 to April 2012

Fuel may leak

Fuel may leak from the injector rails. Drivers may notice a smell of fuel and or evidence of a leak

Put right by: On affected vehicles replace injector rails and seals.

DVSA R/2015/0311,073 vehicles affected in the UK
🏛️ October 2014Cars built January 2012 to August 2014

Reduction in braking performance

On affected vehicles engine oil may in isolated instances enter the brake servo via the vacuum feed lie.This may cause the brake servo diaphragm to rupture and loss of brake servo assistance.

Put right by: Replace vacuum line on affected vehicles.

DVSA R/2014/0985,755 vehicles affected in the UK
🏛️ December 2011

Curtain airbag may not inflate

On Audi A6 manufactured within a specific period it is possible that the curtain airbag has not been correctly sewn together. As a result the curtain airbag may fail to inflate.

Put right by: Replacement of the curtain airbags.

DVSA R/2012/01411 vehicles affected in the UK

Recall data published by the Driver and Vehicle Standards Agency under the Open Government Licence v3.0. A recall listed here may not apply to every car of this model: the build dates and the registration check are what decide it.

Audi A6 cambelt or timing chain, and service intervals

An overdue cambelt is the most expensive thing a seller can fail to mention on a used A6. These are the figures UK specialists work to.

Timing belt (cambelt)Belt
2.0 TDI, EA189, EA288
60,000 miles or 5 years, whichever comes first

Applies to the EA189/EA288 common-rail 2.0 TDI. VW Group UK dropped the time-based interval in 2023 in favour of mileage-only limits, but independent specialists advise replacing belt and water pump every 5 years or 60,000 miles. The earlier pumpe-duse 2.0 TDI (BLB/BRE/BNA) is a different engine with its own longer interval, listed separately.

Timing chainChain
2.0 TSI, 2.0 TFSI, EA888
No fixed replacement interval

EA888 timing chain tensioners fail, giving a cold-start rattle on 2008-2013 cars that escalates to the chain skipping teeth and a full engine rebuild on this interference engine. No official replacement interval; specialists commonly replace before 80,000 miles, and a chain job runs from around GBP 1,500.

Multitronic CVT oil and filter
01J, 0AW
40,000 miles

Audi marketed the multitronic as sealed for life, but the service book specifies an ATF and filter change every 40,000 miles. The job needs the sump off to reach the internal strainer. Neglected units fail expensively through clutch and chain wear, with failures reported anywhere from 30,000 to 120,000 miles and rebuilds often exceeding the car's value; regularly serviced boxes have passed 150,000 miles.

S-tronic gearbox oil and filter
DL501, 0B5, 7-SPEED LONGITUDINAL
40,000 miles

Audi's own maintenance schedule for the 7-speed longitudinal S-tronic: first oil change at 35,000 miles, then every 40,000 miles. The box has two separate oil circuits, clutch/hydraulic ATF plus gear oil, and specialists note the gear-oil side is often skipped. Missed changes are a classic cause of mechatronic faults and harsh shifting.

Automatic gearbox oil
8HP, ZF 8-SPEED, 8HP55, 8HP65
60,000 miles or 8 years, whichever comes first

Audi treats the ZF 8HP tiptronic as filled for life, but ZF, the gearbox maker, publishes official oil-change kits and a change procedure for the Audi 8HP55A/8HP65A/8HP90A/8HP95A units, which contradicts any sealed-for-life reading. UK specialists put the interval at 50,000-60,000 miles or 8 years, sooner for towing, tuned or hard-driven cars.

Timing belt (cambelt)Belt
2.0 TDI PD, B7
75,000 miles or 5 years, whichever comes first

Pre-EA189 pumpe-duse 2.0 TDI (A4 B7 2005-2008, A6 C6 2004-2008). Audi UK customer services and dealer paperwork quoted the cambelt due at 75,000 miles for four-cylinder TDIs, while handbooks of the era say 80,000 miles or 5 years; the shorter 75,000 miles / 5 years is recorded. Interference engine, so replace tensioner and water pump with the belt. This engine is not covered by the EA189/EA288 row and carries a longer interval than it.

Timing belt (cambelt)Belt
2.5 V6 TDI, 2.5 TDI
60,000 miles or 4 years, whichever comes first

Notorious engine. Audi's schedule said 80,000 miles with a check at 40,000 and no time limit, but the 2.5 V6 TDI's reputation for camshaft and rocker wear (pre-2003 AFB/AKN especially) and belt-drive failures means UK garage advice is 60,000 miles and 4-5 years; the shorter 60,000 miles / 4 years is recorded. Interference engine and failure is usually terminal.

Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.

Repair costs are typical UK ranges, not quotes. Actual cost depends on condition and garage.Data last verified: October 2026

Audi A6 buying questions

What are the most common Audi A6 problems?

Three stand out. Fuel system: manufacturer recall to replace Siemens Piezoelectric injectors on 2.0 TDI PD engines (e.g.. Engine: the 3.0 TDI V6 engine is prone to water pump failure (typically 95000+ miles). Engine: recall issued for the additional coolant pump on EA888 2.0 TFSI engines. The full list above is grouped by generation, with typical mileage and a rough repair cost for each.

Which Audi A6 years should I avoid?

No Audi A6 year is a write-off, but the C6 (2004 to 2011) carries the most serious faults: fuel system, engine, gearbox and electrics. The C7 (2011 to 2018) and C5 (1997 to 2004) have high-severity faults on record too. Year matters less than whether the specific car has had the known fixes, so check the history for them.

What should I check when viewing a used Audi A6?

Ask the seller about the fuel system and engine faults on this page and whether they have been fixed, with invoices. On the test drive watch for engine cutting out unexpectedly, coolant loss and engine overheating. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against all 26 known faults before you travel. Check a Audi A6 advert →

Are there any recalls on the Audi A6?

The DVSA lists 27 safety recalls for the Audi A6 issued between 2011 and 2025. The most recent, from November 2025, is "Belt buckle rivet missing". Recall work is done by the manufacturer, and GOV.UK says you will not usually have to pay for it. This list is by model, so it cannot tell you whether one particular car has had the work: the free GOV.UK MOT history check shows a recall status from the registration where the manufacturer shares it, and a franchised dealer can check the VIN.

What is the real MPG of an Audi A6?

Owners report 40.8 mpg on average across the Audi A6 engines with data, about 83% of the official combined figure. The gap between official and real-world economy varies a lot by engine, so the Real MPG page lists every engine and generation separately, from 1,966 owner submissions. Audi A6 Real MPG by engine →

Looking at an Audi A6 right now? Check the advert before you go and see it.

Where this Audi A6 fault data comes from

If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Audi A6 owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.

CarAdCheck is not affiliated with Honest John or Volkswagen Financial Services. What happened to Honest John, and where each feature lives now.

Before you go and see it

Knowing what a Audi A6 goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.

How to haggle for a used car: negotiate the price with what its records show13 min readHPI check vs carVertical: which is better, and our pick for a UK car9 min readMOT advisories explained: how to check them, and which ones should worry you12 min read
All buyer's guides →

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