2025 MOT results
Mazda 6 common problems
The most common reason a Mazda 6 fails its MOT is a sidelight out, on 13.8% of its 17,403 failed tests in 2025. Against other cars of the same age, 5 faults stand out, the widest gaps being: a split joint boot at 5.5% of failures against 2.0% expected; a weak handbrake at 9.4% of failures against 4.0% expected; a worn steering or suspension joint at 10.0% of failures against 5.7% expected.
- Tests in 2025 56,476 Cars aged three and over
- Failed first time 30.8% 17,403 tests
- Found a dangerous defect 9.3% Unsafe to drive away
- Ended with an advisory 58.7% A problem to watch, not a failure
What fails a Mazda 6 MOT
Each bar is the share of failed Mazda 6 tests with that defect. Where we can compare it with cars of the same registration years, the marker shows what an average car of those ages records (12 of the 12 items below).
Most common reasons for failure
A test can fail for more than one defect, so shares add up to more than 100%.
| Defect | Share of failed tests |
|---|---|
| Position lamp: not working Lamps, reflectors and electrical equipment | 13.8% |
| Coil spring: fractured or broken Suspension | 10.1% |
| Suspension arms: ball joint excessively worn Suspension | 10.0% |
| Brake pads: less than 1.5 mm thick Brakes | 9.8% |
| Parking brake efficiency below requirements Brakes | 9.4% |
| Tyres: tread depth below requirements of 1.6mm Tyres | 6.9% |
| Wipers: does not clear the windscreen effectively Visibility | 6.9% |
| Malfunction indicator lamp: inoperative or indicates a malfunction Noise, emissions and leaks | 5.6% |
| Suspension arms: ball joint dust cover no longer prevents the ingress of dirt Suspension | 5.5% |
| Headlamp aim: projected beam image is obviously incorrect Lamps, reflectors and electrical equipment | 5.4% |
| Tyres: cut in excess of the requirements deep enough to reach the ply or cords Tyres | 4.3% |
| Registration plate lamp(s): inoperative in the case of a single lamp or all lamps Lamps, reflectors and electrical equipment | 4.2% |
Source:DVSA,UK Motoring analysis 2025 Updated
-
Sidelight out
13.8% of failures 8.8% expected 1.6 times as often
A sidelight, also called a position lamp, not working. It marks the width of the car at night.
Walk round the car with the lights on and the hazards going; these are the cheapest failures to avoid.
-
Broken coil spring
10.1% of failures 9.8% expected about as expected
A broken suspension spring, which usually snaps in the bottom coil and often fails on both sides within a year.
Look at each corner for a sagging ride height, and listen for a knock over speed bumps.
-
Worn steering or suspension joint
10.0% of failures 5.7% expected 1.8 times as often
Play in a steering or suspension joint, where a worn ball and socket lets the wheel move where it should not.
A knock at low speed over rough ground, or vague steering, is the usual warning.
-
Worn brake pads
9.8% of failures 6.4% expected 1.5 times as often
Friction material worn under 1.5mm, thinner than the point most manufacturers call the limit.
Look through the wheel spokes at the pad against the disc; wear indicators squeal before they get this far.
-
Weak handbrake
9.4% of failures 4.0% expected 2.4 times as often
The handbrake cannot hold the car to the efficiency the test requires, usually from a stretched cable or seized rear callipers.
On a hill, the handbrake should hold the car with a couple of clicks left in the lever.
-
Tyre worn below the legal limit
6.9% of failures 8.1% expected about as expected
A tyre worn past the 1.6mm legal minimum across the middle three quarters of the tread.
A 20p coin in the main grooves: if the outer band of the coin is visible, the tyre is close to the limit.
Which parts of the car fail
Suspension is the area that most often fails a Mazda 6, on 39.3% of failed tests. The widest gap against cars of the same registration years is brakes, on 31.9% against 22.0% expected.
Failure categories
DVSA's own sections of the test. The marker is what cars of the same registration years record.
| Defect category | Share of failed tests |
|---|---|
| Suspension | 39.3% |
| Lamps, reflectors and electrical equipment | 33.4% |
| Brakes | 31.9% |
| Tyres | 18.6% |
| Visibility | 13.1% |
| Noise, emissions and leaks | 11.4% |
| Body, chassis, structure | 6.1% |
| Steering | 3.9% |
Source:DVSA,UK Motoring analysis 2025 Updated
What testers warn about
58.7% of Mazda 6 tests ended with at least one advisory: a fault the tester found that did not fail the test. On Mazda 6s, these are the items to ask about on a car you are viewing, because they are what the last tester expected to go next.
Most common advisories
Share of all tests, passes included.
| Advisory | Share of tests |
|---|---|
| Tread depth: worn close to legal limit or worn on edge Tyres | 19.2% |
| Brake discs: worn, pitted or scored, but not seriously weakened Brakes | 12.1% |
| Brake pads: wearing thin Brakes | 11.2% |
| Sub-frame: corroded but not seriously weakened Suspension | 9.4% |
| Suspension arms: pin or bush worn but not resulting in excessive movement Suspension | 8.2% |
| Suspension arm: corroded but not seriously weakened Suspension | 8.1% |
| Tyres: slightly damaged or cracking or perishing Tyres | 8.0% |
| Rigid brake pipes: corroded, covered in grease or other material Brakes | 6.4% |
| Registration plates: deteriorated but not likely to be misread Identification of the vehicle | 2.9% |
| Service brake performance: binding but not excessively Brakes | 2.7% |
| Headlamp: product on the lens but not seriously reducing light output Lamps, reflectors and electrical equipment | 2.4% |
| Suspension arms: ball joint has slight play Suspension | 2.4% |
Source:DVSA,UK Motoring analysis 2025 Updated
What changes as a Mazda 6 gets older
A 2019 Mazda 6 failed 13.2% of its MOT tests in 2025; a 2008 one failed 46.5%. What fails changes as much as how often, and these are the two years themselves rather than an average across them.
2019 Mazda 6 13.2% failed, from 4,388 tests
- Wiper blades that do not clear the screen 18.7%
- Worn brake pads 16.6%
- Cut tyre 11.1%
- Broken coil spring 10.2%
- Tyre worn below the legal limit 7.8%
- Headlamp aim set too low 6.7%
2008 Mazda 6 46.5% failed, from 2,512 tests
- Sidelight out 24.9%
- Weak handbrake 14.0%
- Headlamp aim out of line 13.9%
- Airbag light on 13.8%
- Number plate lamp out 12.9%
- Split joint boot 9.3%
Shares are of each year's failed tests. Every MOT a particular car has had, with the defects and advisories written at each test, is on GOV.UK's MOT history service from the registration, free.
Mazda 6 problems: common questions
What is the most common problem with a Mazda 6?
Of the faults that fail an MOT, “Position lamp: not working” is the most common: it appears on 13.8% of failed Mazda 6 tests. Across categories, suspension is the area that most often fails one, on 39.3% of failed tests.
How often does a Mazda 6 fail its MOT?
30.8% of Mazda 6 tests in 2025 were not passed first time, from 56,476 tests of cars aged three and over. Allowing for the age and mileage of the cars tested, that gives it a UK Motoring Reliability Score of 49 out of 100, where 50 is as expected.
Does anything fail more often on a Mazda 6 than on other cars?
Yes. “Suspension arms: ball joint dust cover no longer prevents the ingress of dirt” appears on 5.5% of its failures against 2.0% for cars of the same age, and “Parking brake efficiency below requirements” appears on 9.4% of its failures against 4.0% for cars of the same age. Where an item is missing from the national figures for a year, we use the smallest share those figures show, so the comparison never overstates the difference.
Are these the same as breakdowns or known faults?
No. These are the items a tester recorded at the MOT, which covers condition and safety: lamps, brakes, tyres, suspension, corrosion and emissions. A gearbox that is unpleasant, an infotainment screen that has died, or a car that will not start on a cold morning are not part of the test, so they are not in these figures.
Where do the figures come from?
Every normal MOT test of a Mazda 6 aged three and over in Great Britain in 2025, from DVSA's anonymised MOT results. Retests are excluded, and the same fault on more than one wheel counts once.
Data stories to read next
Data sources and methodology
| Figures | Source | Period | Records | Updated |
|---|---|---|---|---|
| MOT defects and advisories | Anonymised MOT tests and results Driver and Vehicle Standards Agency Derived statistics UK Motoring | 2025 | 56,476 MOT tests | 19 September 2026 |
- Shares for defects are of failed tests; shares for advisories are of all tests. A test can carry several defects, so shares add to more than 100%.
- The expected share is what an average car of the same registration years records, weighted by where this model’s failures fall. Where an item is outside the national figures for a year, the smallest share those figures show is used in its place, which is an upper bound, so the comparison never overstates a model’s problems. No expectation is published where less than 80% of the model’s failures can be compared.
- Great Britain only: DVSA does not run MOT testing in Northern Ireland. Cars under three years old are not tested.
- The descriptions of what each part does are general and the same on every model. Every figure comes from the MOT data.
Contains public sector information licensed under the Open Government Licence v3.0.