Used buying checklist
Mazda 6 reliability, common problems and used buying checks
A used Mazda 6 looks about average for reliability in UK MOT data: 20.2% of 82,496 tests failed, compared with 18.7% across all indexed models. A good example should have a clean MOT history for corrosion and structure, suspension and steering, and lights and electrical.
It can be, if the exact car has a clean history for corrosion and structure, suspension and steering, and lights and electrical.
Start with corrosion and structure, suspension and steering, and lights and electrical, then compare the car's mileage and recall record below.
Sources used: DVSA MOT tests (Apr 2026); vehicle recalls (Apr 2026); MOT fault wording (May 2025). MOT data does not capture every reliability issue, especially intermittent engine, gearbox or infotainment faults that do not appear during the test.
- 20.2% MOT failure rate
- Median tested mileage 87,994 miles
- 16,624 failed MOT tests analysed
Corrosion and structure is the clearest area to check
Corrosion and structure is the clearest named problem area in this model's MOT history (49.0 MOT notes per 100 tests). Example MOT phrases from this area include corroded and seriously weakened, excessively corroded, and prescribed area excessively corroded significantly reducing structural strength.
Example MOT phrases to search in the car's history:
- corroded and seriously weakened
- excessively corroded
- prescribed area excessively corroded significantly reducing structural strength
- corroded to the extent that the rigidity of the assembly is significantly reduced
- ball joint dust cover severely deteriorated
- across an axle
- ball joint excessively worn
- has excessive free play detected at the steering wheel (steering rack fitted)
- warning lamp indicates a fault
- slightly twisted
Focus on corrosion and structure, suspension and steering, and lights and electrical
The model's recorded failure rate is 20.2%, +1.4 percentage points compared with the average across all models. Use the seller questions below to check whether repeat MOT notes have actually been repaired.
- MOT tests analysed82,496 tests
- Median tested mileage87,994 miles
- Failed MOT tests16,624
Should you buy a used Mazda 6?
79.8% of the MOT tests we analysed for this model passed. The model's recorded failure rate is 20.2%, +1.4 percentage points compared with the average across all models. This is a buying brief for the exact car in front of you: clean repeat history matters more than badge reputation.
- Repeat unresolved MOT notes for corrosion and structure, suspension and steering, and lights and electrical
- corrosion and structure appearing across more than one MOT
- Any dangerous MOT failure on the exact car, especially if the same area appears again later
- No paperwork showing applicable recall work has been completed
- A seller who cannot explain MOT wording such as "corroded and seriously weakened"
It can be, if the exact car has a clean history for corrosion and structure, suspension and steering, and lights and electrical.
Start with corrosion and structure, suspension and steering, and lights and electrical, then compare the car's mileage and recall record below.
Corrosion and structure is the clearest named problem area in the MOT history (49.0 MOT notes per 100 tests). These counts are issue notes, not failure rates, because a single MOT can list several faults.
Past 100k miles on the Mazda 6, MOT records most often point to corrosion and structure, suspension and steering, and lights and electrical.
The MOT failure rate rises from 4.9% at 0-3 years to 29.8% at 15+ years. Compare the car with the nearest age range before treating a fault as normal wear or a warning sign. The average MOT failure rate across all models in the same dataset is 18.7%.
Start with corrosion and structure, suspension and steering, lights and electrical, and windscreen, wipers, and mirrors. The checklist on this page explains why each area is being recommended, what to inspect, and what to ask the seller.
6 relevant recall notices appear for this model. Treat them as safety checks to verify for the exact car, not as normal MOT wear.
What should I check first?
Start with corrosion and structure, suspension and steering, lights and electrical, and windscreen, wipers, and mirrors. The checklist on this page explains why each area is being recommended, what to inspect, and what to ask the seller. Each item shows whether it comes from MOT results, recall notices, or a standard used-car check.
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Corrosion and structure Seen in MOT results
Corrosion and structure is one of the most common MOT problem areas for this model (49.0 MOT notes per 100 tests).
What to check: Inspect sills, subframes, mounting points, arches, and underside corrosion advisories.
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Suspension and steering Seen in MOT results
Suspension and steering is one of the most common MOT problem areas for this model (18.2 MOT notes per 100 tests).
What to check: Listen for knocks, check uneven tyre wear, and inspect steering play.
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Lights and electrical Seen in MOT results
Lights and electrical is one of the most common MOT problem areas for this model (14.8 MOT notes per 100 tests).
What to check: Check every lamp, warning light, horn, battery condition, and dashboard messages.
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Windscreen, wipers, and mirrors Seen in MOT results
Windscreen, wipers, and mirrors is one of the most common MOT problem areas for this model (6.8 MOT notes per 100 tests).
What to check: Check windscreen damage, wiper operation, washers, mirrors, and demisting.
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Emissions, engine, and exhaust Seen in MOT results
Emissions, engine, and exhaust is one of the most common MOT problem areas for this model (5.6 MOT notes per 100 tests).
What to check: Check warning lights, smoke, exhaust leaks, recent emissions failures, and service history.
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Tyres and wheels Seen in MOT results
Tyres and wheels is one of the most common MOT problem areas for this model (2.3 MOT notes per 100 tests).
What to check: Check tyre age, tread depth, sidewall damage, wheel condition, and alignment wear.
What changes with mileage?
Past 100k miles on the Mazda 6, MOT records most often point to corrosion and structure, suspension and steering, and lights and electrical.
Common MOT problem areas
Common faults: what usually fails on this model?
Corrosion and structure is the clearest named problem area in the MOT history (49.0 MOT notes per 100 tests). These counts are issue notes, not failure rates, because a single MOT can list several faults.
Recall-related areas to verify
Official recall areas
Manufacturer recall notices for the Mazda 6 mainly involve 6 areas: emissions, engine, and exhaust, lights and electrical, seatbelts and safety systems, and mixed recall notices. Treat each as something to verify on the specific car you are viewing; the recall table below shows the official notice text.
Mileage and age checks
Mileage changes: what starts showing up after high mileage?
Past 100k miles on the Mazda 6, MOT records most often point to corrosion and structure, suspension and steering, and lights and electrical. On lower-mileage cars, the most common named areas are corrosion and structure, windscreen, wipers, and mirrors, and suspension and steering.
| Mileage range | Tests | Vehicles | Failure rate (vs all models) | Median mileage |
|---|---|---|---|---|
| 0-50k | 15,117 | 13,029 | 10.6%-0.2 percentage points vs all models | 34,570 miles |
| 50-100k | 34,627 | 27,590 | 19.4%-1.4 percentage points vs all models | 76,416 miles |
| 100-150k | 25,327 | 18,805 | 25.3%-0.9 percentage points vs all models | 119,301 miles |
| 150-200k | 6,075 | 4,490 | 27.5%+0.2 percentage points vs all models | 164,587 miles |
| 200k+ | 818 | 603 | 26.7%+0.1 percentage points vs all models | 215,266 miles |
Problem areas by mileage
Past 100k miles on the Mazda 6, MOT records most often point to corrosion and structure, suspension and steering, and lights and electrical.
| Mileage range | Car areas most often recorded | Specific MOT defect examples |
|---|---|---|
| 0-50k |
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| 50-100k |
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| 100-150k |
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| 150-200k |
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| 200k+ |
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Fair comparisons: is this problem normal for its age?
The MOT failure rate rises from 4.9% at 0-3 years to 29.8% at 15+ years. Compare the car with the nearest age range before treating a fault as normal wear or a warning sign. The average MOT failure rate across all models in the same dataset is 18.7%. The highest failure rate by age is 29.8% for 15+ years cars, based on 11,468 tests.
| Age range | Tests | Vehicles | Failure rate (vs all models) | Median age |
|---|---|---|---|---|
| 0-3 years 2023–2026 reg. |
924 | 876 | 4.9%-3.6 percentage points vs all models | 3.0 years |
| 3-6 years 2020–2023 reg. |
11,962 | 10,452 | 9.4%-1.2 percentage points vs all models | 4.9 years |
| 6-10 years 2016–2020 reg. |
29,478 | 23,756 | 17.1%+0.4 percentage points vs all models | 8.0 years |
| 10-15 years 2011–2016 reg. |
28,664 | 21,237 | 24.4%+0.9 percentage points vs all models | 12.8 years |
| 15+ years pre-2011 reg. |
11,468 | 8,298 | 29.8%+3.9 percentage points vs all models | 16.2 years |
Recall records and data freshness
Recall context: are there safety notices to know about?
6 relevant recall notices appear for this model. Treat them as safety checks to verify for the exact car, not as normal MOT wear.
| 2017-05-31 | MOUNTING POINTS FOR SEAT RUNNER MAY FAIL One or more of the mounting points between the runner and the driver�s seat may fail. On affected vehicles inspect the driver�s 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. |
|---|---|
| 2017-02-22 | AIRBAG MAY MALFUNCTION It has been identified that the density of the propellant within the airbag inflator may be insufficient due to inappropriate production and storage conditions of the propellant. In this condition the inflator may abnormally ignite at the time of the airbag deployment allowing the inner pressure of the inflator to increase abnormally resulting in the breakage of the inflator case. In this condition the airbags will not provide adequate protection during a frontal impact as the broken pieces of the inflator case could injure the driver and/or front seat passenger. Recall all affected vehicles to replace the driver and passenger front airbag inflators with modified units. |
| 2016-04-29 | DRIVER'S FRONT AIRBAG MAY FAIL TO DEPLOY CORRECTLY Continued exposure to high levels of absolute humidity may cause the driver�s front airbag inflator housing to rupture and deploy abnormally in the event of a crash necessitating deployment of the driver�s front airbag. Should the inflator rupture it could result in metal fragments striking the driver or other vehicle occupants. On affected vehicles replace air bag inflator |
| 2014-10-21 | ENGINE MAY STALL Engine may not restart when customer expects after i-stop operation. Although check engine light on dashboard will illuminate. Recall the vehicles that are likely to be affected and re-programme the engine Power Control Module (PCM) with a modified calibration. |
| 2013-04-24 | PASSENGER SIDE AIRBAG MAY FAIL TO DEPLOY CORRECTLY The subject vehicles are equipped with front passenger airbag inflators which could have been assembled with improperly manufactured propellant wafers. Improperly manufactured propellant wafers could cause the inflator to rupture and the front passenger airbag to deploy abnormally in a crash. This could result in increased risk of injury to the occupant and the possibility of a fire. Recall the vehicles that are likely to be affected to inspect and where necessary replace the airbag inflator module. |
| 2013-03-26 | FIRE MAY OCCUR A ceramic condenser required for noise suppression located within the DC-DC converter may have a crack within it causing the condenser to short circuit. It is possible that the DC-DC converter may melt and generate smoke and in the worst case cause a vehicle fire. This converter is located under the front passenger seat.There is small possibility that the DC-DC converter may melt resulting in a vehicle fire A Mazda dealer will replace the DC-DC converter with a modified one. |
Related searches
Common ways people look up the Mazda 6. Each link runs the search and lands on the relevant section of this report.
Related reliability guides
See where this model sits against other Mazda reports by MOT failure rate and common problem area.
Compare high-confidence model reports across all makes.
Use the fleet mileage baseline before checking this model's own mileage table.
Compare this model's age pattern with the wider MOT baseline.
Sources used: DVSA MOT tests (Apr 2026); vehicle recalls (Apr 2026); MOT fault wording (May 2025). These are patterns from many MOT tests and recall notices. They help you decide what to inspect and what to ask; they do not certify the condition of one specific car.