Is the Audi TT reliable?

On MOT evidence the Audi TT is well above average. It passes 81.0% of tests once age and mileage are accounted for, against a national average of 72.3%, which ranks it 48 of 262 models with enough data for a fair comparison. This measures how often the car meets the MOT standard, not how often it breaks down or what a repair costs.

What is the most common MOT failure on a Audi TT?

The item recorded most often is "Tyre tread depth not in accordance with the requirements", which appears in 17.3% of failed Audi TT tests. Because one failed test can list several items, these shares do not add up to 100%.

What do testers most often warn about on a Audi TT?

The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 24.6% of all Audi TT tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Audi TT usually have at its MOT?

The average odometer reading recorded at test is 80,216 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

Does a Audi TT get harder to pass as it ages?

Yes. At 3 to 5 years old, 91.8% of Audi TT tests pass. By fifteen years or more, that falls to 65.3%. Nearly every model follows this pattern, which is why comparing raw pass rates between models is misleading unless age is accounted for.

Are most Audi TT models petrol or diesel?

Of the Audi TT cars tested, 83% are petrol, 17% are diesel. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

Model reliability file

Audi TT MOT pass rate & common failures

From 111,820 recorded MOT tests of the Audi TT, published by DVSA.

Data updated 29 July 2026

Quick answer

The Audi TT passes 81.0% of MOT tests once results are adjusted for the age and mileage of the cars tested, against a national average of 72.3%. That is well above average, ranking it 48 of 262 models with enough data to compare fairly. Based on 111,820 tests. Its most commonly recorded failure is tyre tread depth not in accordance with the requirements, which appears in 17.3% of failed tests. Cars of this model average 80,216 miles on the odometer when tested.

At a glance

Pass rate, adjusted for age and mileage

81.0%national average72.3%unadjusted76.8%range covered98%rank48 of 262

The TT is 8.7 percentage points above the national pass rate once age and mileage are accounted for, which is well above average. The unadjusted figure is 76.8%; the difference is what the age and mileage of this model’s fleet was hiding.

DVSA recorded wording

Most common failure items

Share of failed Audi TT tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.Tyre tread depth not in accordance with the requirements17.3%
3,832 occurrencesTyre worn close to the legal limit explained
2.A spring or spring component fractured or seriously weakened13.2%
2,927 occurrencesRoad spring broken or fractured explained
3.A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning10.7%
2,362 occurrencesLamp not working explained
4.A suspension joint dust cover missing or no longer prevents the ingress of dirt etc10.1%
2,240 occurrencesSuspension joint dust cover missing or split explained
5.A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc9.4%
2,072 occurrencesDriveshaft CV joint gaiter split or missing explained
6.A tyre cords visible or damaged8.8%
1,961 occurrencesTyre ply or cord exposed, or the casing separating explained
7.Engine MIL illuminated indicating a malfunction7.8%
1,719 occurrencesEngine management light on, or not working explained
8.A tyre seriously damaged7.3%
1,628 occurrencesTyre damaged or deteriorated explained
9.Wiper blade missing or obviously not clearing the windscreen6.5%
1,440 occurrencesWiper or washer not working properly explained
10.The aim of a headlamp is not within limits laid down in the requirements6.2%
1,368 occurrencesHeadlamp aim incorrect explained

Warnings without a failure

Most common advisories

Share of all Audi TT tests carrying each advisory. The denominator differs from the failure list above because an advisory can be issued on a car that passed.

1.Tyre tread depth not in accordance with the requirements24.6%
27,506 testsTyre worn close to the legal limit explained
2.Brake disc or drum excessively weakened, insecure or fractured13.9%
15,539 testsBrake disc worn, pitted or scored explained
3.A tyre seriously damaged10.7%
11,929 testsTyre damaged or deteriorated explained
4.A suspension component excessively damaged or corroded8.7%
9,714 testsSuspension mounting corroded or insecure explained
5.A spring or spring component fractured or seriously weakened7.0%
7,847 testsRoad spring broken or fractured explained
6.A brake lining or pad worn below 1.5mm7.0%
7,837 testsBrake drum or shoe worn or contaminated explained
7.A suspension pin, bush or joint excessively worn6.5%
7,299 testsSuspension arm bush worn explained
8.Brake pipe damaged or excessively corroded6.2%
6,977 testsBrake pipe corroded explained

How wear changes the picture

Pass rate by vehicle age

3–5 yrs92%

6–8 yrs89%

9–11 yrs85%

12–14 yrs79%

15+ yrs65%

Bands holding too few tests to be meaningful are omitted rather than shown as a rate.

What gets tested

The TT fleet

Average mileage recorded at test: 80,216
Fuel mix of tested cars: Petrol83.2%
Diesel16.8%

Trim names grouped into this model (23)

Recorded exactly as DVSA holds them. Trim-level names are rolled up so one model is not split across a dozen thin pages.

AUDI TT
TT CABRIOLET
TT QUATTRO
TT QUATTRO S-LINE
TT QUATTRO S-LINE TDI
TT S
TT S LINE FINAL ED 40 TFSI SA
TT S LINE TFSI AUTO
TT S LINE VORSPRUNG 40 TFSI SA
TT S LINE VORSPRUNG 45 TFSI
TT S LINE VORSPRUNG 45 TFSI SA
TT S LN VSPRUNG45 TFSI QUAT SA
TT S QUATTRO S A CONVERTIBLE
TT S TFSI
TT SPORT ED 45 TFSI QUAT S-A
TT SPORT EDITION 40 TFSI S-A
TT SPORT EDITION 45 TFSI S-A
TT TDI QUATTRO
TT TFSI
TT TFSI QUATTRO
TT TFSI S-LINE BLACK EDITION
TT TFSI S-LINE QUATTRO
TT ULTRA

Check a specific Audi TT

A model average tells you the pattern. Its own MOT record tells you the car.

Compare within the range

Other Audi models

Audi A3 — 77.8% adjusted
Audi A4 — 77.8% adjusted
Audi A1 — 73.7% adjusted
Audi Q3 — 81.5% adjusted
Audi A5 — 79.1% adjusted
Audi A6 — 82.4% adjusted
All Audi models

Similar test volumes

Compare against other makes

BMW 4 Series — 83.2% adjusted, ranked 28
Ford Ecosport — 72.4% adjusted, ranked 140
BMW X1 — 79.5% adjusted, ranked 59
Land Rover Freelander — 72.6% adjusted, ranked 137

Common questions

Is the Audi TT reliable?: On MOT evidence the Audi TT is well above average. It passes 81.0% of tests once age and mileage are accounted for, against a national average of 72.3%, which ranks it 48 of 262 models with enough data for a fair comparison. This measures how often the car meets the MOT standard, not how often it breaks down or what a repair costs.
What is the most common MOT failure on a Audi TT?: The item recorded most often is "Tyre tread depth not in accordance with the requirements", which appears in 17.3% of failed Audi TT tests. Because one failed test can list several items, these shares do not add up to 100%.
What do testers most often warn about on a Audi TT?: The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 24.6% of all Audi TT tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Audi TT usually have at its MOT?: The average odometer reading recorded at test is 80,216 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.
Does a Audi TT get harder to pass as it ages?: Yes. At 3 to 5 years old, 91.8% of Audi TT tests pass. By fifteen years or more, that falls to 65.3%. Nearly every model follows this pattern, which is why comparing raw pass rates between models is misleading unless age is accounted for.
Are most Audi TT models petrol or diesel?: Of the Audi TT cars tested, 83% are petrol, 17% are diesel. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

How this was worked out

Method and limits

Figures come from the DVSA anonymised MOT testing dataset, published under the Open Government Licence. Only class 4 initial tests are counted: retests are excluded so a car appears once, and abandoned tests are excluded entirely. The adjusted rate is directly standardised across twenty-five age and mileage bands and reweighted onto the national distribution, so this model is compared against cars that have lived a similar life rather than against a younger or lighter-used fleet.

An MOT measures whether a car met a legal standard on the day. It is not a breakdown record, a service history or a running-cost estimate, and a pass rate is a property of a fleet rather than a prediction about one car.