Known Faults Database

Audi A7 problems, reliability and years to avoid

If you are considering buying a used Audi A7, these are the common problems worth knowing about first. Our garage database tracks 4 known faults for this model, 4 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 A7 reliable?

The Audi A7 has 4 known faults in our database across 2 generations, 4 of them rated high severity. The most serious are gearbox (failure of the mechatronic control unit or the clutches in the S tronic seven-speed) 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 A7 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.

C7, 2010 to 20184 high severity

4 known faults, the serious ones in the gearbox, engine

C8, 2018 on

No faults on record yet

Years and engines with a serious known fault

2008 to 2016, 7-speed S tronic (DL501, longitudinal): failure of the mechatronic control unit or the clutches in the S tronic
2004 to 2015, 3.0 TDI V6: the 3.0 TDI V6 engine is prone to water pump failure
2010 to 2017, 7-speed S-Tronic (DL501): mechatronic unit failure in the 7-speed S-Tronic (DL501) gearbox
2004 to 2018, 3.0 V6 TDI (chain tensioner): timing chain tensioner failure causing severe rattling

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

Generation 1 of 24 known faults · 5 owner reports · 3 good notes

Audi A7 C7 (2010 to 2018) problems

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/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💬 4 owner reports, 2016 to 2017

Mechatronic unit failure in the 7-speed S-Tronic (DL501) gearbox, leading to erratic shifting, lurching, and potential loss of drive. Oil leaks from the gearbox have also been reported.

Rough guide

£1500-3000

Typical symptoms

Car lurching forward against the brakes when stopping
Jerky or erratic gear changes, especially in traffic
Rumbling noise like marbles in a drum when revving the engine
Vibration in the passenger seat when idling

Affected vehicles

Engines:: 7-speed S-Tronic (DL501)
Typical mileage:: 40000-80000 miles

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Transmission/ClutchHigh severity💬 11 owner reports, 2012 to 2019

Failure of the mechatronic control unit or the clutches in the S tronic seven-speed automatic. Owners describe hesitation at junctions, lurching and jerking at low speed, the engine cutting out or stalling, and losing reverse, with some boxes needing a complete replacement. Several failures followed missed or late gearbox oil and filter changes, but at least one box with every change done on time also failed.

Rough guide

£1400-4752 (what owners paid for a mechatronic repair or a discounted replacement gearbox)

Typical symptoms

Gearbox malfunction warning, sometimes with no reverse
Hesitation pulling away at junctions and roundabouts
Jerking when setting off or slowing to a stop
Car creeping or lurching against the brakes at lights
Engine stalling or cutting out, especially when cold or reversing

Affected vehicles

Engines:: 7-speed S tronic (DL501, longitudinal)
Typical mileage:: 24000-100000 miles

2 more owner reports back this up

June 2016An Audi A7 S tronic transmission failed because a dealer used incorrect fluid, leading to a quote to replace the transmission.
March 2015A 2011 A7 Sportsback transmission had abnormal gear changes, slamming hard when re-accelerating, and Audi diagnosed a faulty ECU, Mechatronics, and clutch pack.

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What owners report on the C7

5 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.

Suspension and steering · September 2019A 2015 Audi A7 required a new steering rack at 50,000 miles, costing £2,600 for the repair.
Engine · February 2019A 2014 Audi A7 3.0 BiTDi at 54,000 miles developed engine cracks, causing coolant to mix with the oil, with Audi quoting £15,000 for a new engine.
Engine · October 2018A 2014 Audi A7 3.0 BiTdi suffered engine failure at 47,000 miles, with coolant found in the sump oil, and repair costs estimated between £6,000 and £22,400.
Bodywork · April 2016The panoramic sunroof of an Audi A7 shattered, costing £6,000 to replace, with the owner losing a £500 insurance excess.
Electrics · January 2014An Audi A7 Sportback experienced multiple issues, including boot lock failures, key failure causing electrics to shut down, and the steering freezing twice, resulting in £5,000 of damage.

What owners like about the C7

3 notes

The Audi A7 Sportback offers a spacious and luxurious cabin, providing a sense of exclusivity due to its rarity on the roads.
The 3.0 BiTDI engine, producing 313PS, delivers impressive power and performance in the Audi A7 Sportback.
The Audi A7 Sportback features a spacious and luxurious interior, enhancing comfort for occupants.

Generation 2 of 20 known faults · 1 owner report · 3 good notes

Audi A7 C8 (2018 on): owner reports

What owners report on the C8

1 single report, 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 · July 2019A 2018 Audi A7 Sportback 3.0 50 BiTDi developed a "Parking Brake Fault" warning at 5,000 miles, which dealers struggled to diagnose, eventually identifying a wiring fault.

What owners like about the C8

3 notes

The Audi A7 Sportback boasts superb interior design, advanced technology, and impeccable build quality.
The hatchback design of the Audi A7 Sportback makes it a very practical vehicle for everyday use.
The Audi A7 Sportback is incredibly quiet and well-suited for covering long distances on motorways.

Sellers rarely admit these faults outright

We track 13 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Audi A7 advert and we check it in seconds.

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Audi A7 recalls

Recall work is done by the manufacturer, and GOV.UK says you will not usually have to pay for it. These are the 14 DVSA recalls for the A7, 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.

🏛️ October 2025Cars built December 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/2025/46372 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.

Put right by: Replace the side airbag and bracket.

DVSA R/2023/3175 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

🏛️ June 2021Cars built December 2015 to December 2018

Vehicles may have been fitted with a hinged towing bracket on which the locking mechanism in the hinge module could be faulty

Vehicles may have been fitted with a 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 where necessary replaced on the vehicles affected.

DVSA R/2021/204263 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

🏛️ 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

🏛️ 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

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 A7 service intervals

Skipped servicing is the cheapest thing for a seller to hide on a used A7. These are the figures UK specialists work to.

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.

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: November 2026

Audi A7 buying questions

What are the most common Audi A7 problems?

Three stand out. Gearbox: failure of the mechatronic control unit or the clutches in the S tronic seven-speed automatic (typically 24000 to 100000 miles). Engine: the 3.0 TDI V6 engine is prone to water pump failure (typically 95000+ miles). Gearbox: mechatronic unit failure in the 7-speed S-Tronic (DL501) gearbox, leading to erratic shifting (typically 40000 to 80000 miles). The full list above is grouped by generation, with typical mileage and a rough repair cost for each.

Which Audi A7 years should I avoid?

No Audi A7 year is a write-off, but the C7 (2010 to 2018) carries the most serious faults: gearbox and engine. The C8 (2018 on) has none rated high severity. 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 A7?

Ask the seller about the gearbox and engine faults on this page and whether they have been fixed, with invoices. On the test drive watch for gearbox malfunction warning, sometimes with no reverse, coolant loss and car lurching forward against the brakes when stopping. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against all 4 known faults before you travel. Check a Audi A7 advert →

Are there any recalls on the Audi A7?

The DVSA lists 14 safety recalls for the Audi A7 issued between 2014 and 2025. The most recent, from October 2025, is "Software update for battery control unit". 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 A7?

Owners report 37.5 mpg on average across the Audi A7 engines with data, about 78% 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 248 owner submissions. Audi A7 Real MPG by engine →

Looking at an Audi A7 right now? Check the advert before you go and see it.

Where this Audi A7 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 A7 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 A7 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.

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