2025 MOT results
Audi TT common problems
The most common reason a Audi TT fails its MOT is a tyre worn below the legal limit, on 11.0% of its 25,947 failed tests in 2025. Against other cars of the same age, 4 faults stand out, the widest gaps being: the airbag light on at 4.4% of failures against 2.1% expected; a split joint boot at 6.8% of failures against 3.4% expected; the engine management light on at 9.1% of failures against 5.7% expected.
- Tests in 2025 111,773 Cars aged three and over
- Failed first time 23.2% 25,947 tests
- Found a dangerous defect 6.5% Unsafe to drive away
- Ended with an advisory 49.7% A problem to watch, not a failure
What fails a Audi TT MOT
Each bar is the share of failed Audi TT 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 |
|---|---|
| Tyres: tread depth below requirements of 1.6mm Tyres | 11.0% |
| Position lamp: not working Lamps, reflectors and electrical equipment | 10.2% |
| Coil spring: fractured or broken Suspension | 10.1% |
| Malfunction indicator lamp: inoperative or indicates a malfunction Noise, emissions and leaks | 9.1% |
| Drive shafts: constant velocity boot split or insecure, no longer prevents the ingress of dirt Body, chassis, structure | 7.2% |
| Linkage ball joint dust cover no longer prevents the ingress of dirt Suspension | 6.8% |
| Tyres: ply or cords exposed Tyres | 6.0% |
| Wipers: does not clear the windscreen effectively Visibility | 5.6% |
| Tyres: cut in excess of the requirements deep enough to reach the ply or cords Tyres | 5.4% |
| Service brake performance: excessively binding Brakes | 4.7% |
| SRS malfunction indicator lamp: warning lamp indicates a fault Seat belts and supplementary restraint systems | 4.4% |
| Brake pads: less than 1.5 mm thick Brakes | 4.4% |
Source:DVSA,UK Motoring analysis 2025 Updated
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Tyre worn below the legal limit
11.0% of failures 7.2% expected 1.5 times as often
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.
-
Sidelight out
10.2% of failures 10.7% expected about as expected
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 8.5% expected somewhat more often
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.
-
Engine management light on
9.1% of failures 5.7% expected 1.6 times as often
The engine management light is on, or has been disconnected. Either fails the test.
A cheap code reader on the diagnostic socket will say what the car has stored before you pay for a test.
-
Split joint boot
7.2% of failures 5.6% expected somewhat more often
A split rubber boot on a joint or driveshaft. The joint may still be sound, but dirt and water get in once the boot is open.
Turn the wheels to full lock and look behind them for greasy splits in the rubber concertina.
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Split joint boot
6.8% of failures 3.4% expected 2 times as often
A split rubber boot on a joint or driveshaft. The joint may still be sound, but dirt and water get in once the boot is open.
Turn the wheels to full lock and look behind them for greasy splits in the rubber concertina.
Which parts of the car fail
Lamps, reflectors and electrical equipment is the area that most often fails a Audi TT, on 34.6% of failed tests. The widest gap against cars of the same registration years is tyres, on 26.3% against 19.5% 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 |
|---|---|
| Lamps, reflectors and electrical equipment | 34.6% |
| Suspension | 30.9% |
| Tyres | 26.3% |
| Brakes | 22.8% |
| Noise, emissions and leaks | 15.6% |
| Visibility | 13.6% |
| Body, chassis, structure | 11.2% |
| Seat belts and supplementary restraint systems | 5.2% |
Source:DVSA,UK Motoring analysis 2025 Updated
What testers warn about
49.7% of Audi TT tests ended with at least one advisory: a fault the tester found that did not fail the test. On Audi TTs, 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 | 17.8% |
| Brake discs: worn, pitted or scored, but not seriously weakened Brakes | 9.6% |
| Tyres: slightly damaged or cracking or perishing Tyres | 6.8% |
| Brake pads: wearing thin Brakes | 5.9% |
| Suspension arm: corroded but not seriously weakened Suspension | 5.3% |
| Sub-frame: corroded but not seriously weakened Suspension | 5.1% |
| Coil spring: corroded Suspension | 4.7% |
| Suspension arms: pin or bush worn but not resulting in excessive movement Suspension | 4.4% |
| Engine oil leak, but not excessive Noise, emissions and leaks | 4.1% |
| Rigid brake pipes: corroded, covered in grease or other material Brakes | 4.0% |
| Shock absorbers: light misting of oil Suspension | 3.2% |
| Nail in tyre Non-component advisories | 2.3% |
Source:DVSA,UK Motoring analysis 2025 Updated
What changes as a Audi TT gets older
A 2022 Audi TT failed 8.4% of its MOT tests in 2025; a 2001 one failed 39.0%. What fails changes as much as how often, and these are the two years themselves rather than an average across them.
2022 Audi TT 8.4% failed, from 2,571 tests
- Tyre worn below the legal limit 35.5%
- Cut tyre 18.0%
- Bulge in a tyre 11.5%
- Headlamp aim set too high 6.9%
- Tyre worn through to the cords 6.5%
2001 Audi TT 39.0% failed, from 2,287 tests
- Split joint boot 16.2%
- Sidelight out 12.4%
- Emissions above the limit 11.9%
- Headlamp aim out of line 11.2%
- Worn suspension bushes 10.2%
- Broken coil spring 9.5%
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.
Audi TT problems: common questions
What is the most common problem with a Audi TT?
Of the faults that fail an MOT, “Tyres: tread depth below requirements of 1.6mm” is the most common: it appears on 11.0% of failed Audi TT tests. Across categories, lamps, reflectors and electrical equipment is the area that most often fails one, on 34.6% of failed tests.
How often does a Audi TT fail its MOT?
23.2% of Audi TT tests in 2025 were not passed first time, from 111,773 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 62 out of 100, where 50 is as expected.
Does anything fail more often on a Audi TT than on other cars?
Yes. “SRS malfunction indicator lamp: warning lamp indicates a fault” appears on 4.4% of its failures against 2.1% for cars of the same age, and “Linkage ball joint dust cover no longer prevents the ingress of dirt” appears on 6.8% of its failures against 3.4% 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 Audi TT 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 | 111,773 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.