If you are considering buying a used Mazda Mazda3, these are the common problems worth knowing about first. Our garage database tracks 3 known faults for this model, 2 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
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Check a Mazda Mazda3 advert (free) →The Mazda Mazda3 has 3 known faults in our database, 2 of them rated high severity. The most serious are engine (DPF regenerations causing oil dilution, premature camshaft wear) and engine (early 2.2 SkyActiv-D engines suffer exhaust camshaft wear). 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.
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.
Each one is set out in full below, with the symptoms, the typical mileage and a rough repair cost.
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.
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.
Sellers rarely admit these faults outright
We track 8 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Mazda Mazda3 advert and we check it in seconds.
Check an advert now (free) →Recall work is done by the manufacturer, and GOV.UK says you will not usually have to pay for it. These are the 19 DVSA recalls for the Mazda3, 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.
On affected vehicles the images from the rear view / 360 cameras may not display.
Put right by: Re-program the View Monitor Control (VMC) module with improved software.
The impeller in the low-pressure fuel pump may become deformed causing fuel pump failure.
Put right by: Replace the low-pressure fuel pump with an improved part.
The plastic logo on the steering wheel centre may shatter and project fragments into the vehicle interior during an air bag deployment.
Put right by: The airbag module cover is to be replaced with an improved part.
Vehicles may unexpectedly stop due to inadvertent activation of the automated Smart Brake Support (SBS) system
Put right by: The vehicle control module is reprogrammed with modified software.
The engine may stall or fail to restart in some driving situations
Put right by: PCM is reprogrammed with modified software
Software controlling the engine air / fuel ratio contains an error.
Put right by: Reprogram the PCM with modified software.
The interior rear view mirror glass could suddenly detach from the mirror assembly.
Put right by: Replace interior mirror with alternative part.
The software controlling the hydraulic valve clearance adjuster may operate incorrectly.
Put right by: Reprogram the system with improved hydraulic valve adjustment control software.
A manufacturing defect may cause the wheel nuts to loosen
Put right by: Re-tighten the wheel nuts to the correct torque
The airbag and seat belt minder indicator unit may display incorrect information
Put right by: Replace the indicator unit assembly with one incorporating improved software
Soot may accumulate around the intake shutter valve on the inlet side of the engine.
Put right by: Check clean or replace the intake shutter valve and update software.
The front windscreen wipers may become inoperable due to a defect in the relay.
Put right by: Replacement of the front body control module with an improved wiper relay design.
The vacuum pump may wear prematurely meaning that in some applications where the brake pedal is pressed quickly whilst at low engine speed the servo assistance provided by the vacuum system in decreased. This could cause a momentary decrease in braking performance. Braking assistance available to the driver can be reduced
Put right by: Vehicles affected will be fitted with a modified Vacuum pump.
The Software controlling the fuel injectors does not control the electric current correctly. This may cause the injector control circuit to short circuit and cause the engine to stall. Results in possible Engine Stall without Warning
Put right by: Vehicles affected will have the injector control software re-programmed
The tightening force of the injector mounting nuts may be insufficient. This could cause combustion gas to leak from the injector and contaminate the engine oil within the cylinder head. This in turn could cause the engine oil strainer to become blocked. This could cause the engine to stall. Engine Pressure Oil Light appears along with the engine malfunction indicator. Possible Engine Stall without Warning
Put right by: Vehicles affected will have the engine checked for contamination and repaired / replaced if necessary. The Fuel injectors will also be re-tightened to the appropriate torque.
On the subject vehicles the engine protection logic does not work properly. When the engine speed reaches maximum with no engine load present the software is unable to cut the engine. This could in extreme cases cause catastrophic engine failure. Immediate and catastrophic engine damage may result.
Put right by: Re-program the engine protection software within the PCM.
One or more of the mounting points between the runner and the drivers seat may fail.
Put right by: On affected vehicles inspect the drivers seat frame to determine if seat lifter links are damaged. If no damage is evident fit reinforcement brackets and push nuts. If damage is present to the seat lifter link replace seat frame. If damage is restricted to stabilizer bar then the bar will be repaired plus brackets and push nuts fitted.
Water may penetrate the tailgate strut cylinder. This may cause corrosion which may affect the strut's attachment.
Put right by: Replace both tailgate struts on affected vehicles
Engine may not restart when customer expects after i-stop operation. Although check engine light on dashboard will illuminate.
Put right by: Recall the vehicles that are likely to be affected and re-programme the engine Power Control Module (PCM) with a modified calibration.
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.
A timing chain has no change interval, which is not the same as lasting for ever. Listen for it on a used Mazda3, and check the oil has been changed on time. These are the figures UK specialists work to.
Mazda SkyActiv engines use a timing chain. On the 2.2 diesel, watch out for oil dilution from DPF regens which can cause premature wear to the engine internals.
Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.
Three stand out. Engine: DPF regenerations causing oil dilution, premature camshaft wear (typically 50000 to 100000 miles). Engine: early 2.2 SkyActiv-D engines suffer exhaust camshaft wear (typically 50000 to 110000 miles). Engine: soot can build up around the intake shutter valve on the inlet side of the 2.2 SkyActiv-D diesel. The full list above is grouped by generation, with typical mileage and a rough repair cost for each.
No Mazda Mazda3 year is a write-off, but the BM / GJ / KE (2012 to 2016) carries the most serious faults: engine. Year matters less than whether the specific car has had the known fixes, so check the history for them.
Ask the seller about the engine faults on this page and whether they have been fixed, with invoices. On the test drive watch for oil level rising above the 'X' mark on dipstick, brake pedal feeling hard or needing more effort when pressed quickly at low revs and juddering or rough running from the engine. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against all 3 known faults before you travel. Check a Mazda Mazda3 advert →
The DVSA lists 19 safety recalls for the Mazda Mazda3 issued between 2014 and 2023. The most recent, from November 2023, is "On affected vehicles the images from the rear view / 360 cameras may not display". 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.
Looking at a Mazda Mazda3 right now? Check the advert before you go and see it.
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 Mazda Mazda3 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.
Knowing what a Mazda Mazda3 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.