Audi TT 2020: reliability & common MOT faults

At a glance

How 2,875 first tests went in 2025.

Passed first time: 92 in every 100
Did not pass first time: 8 in every 100237 failed first-attempt tests
The typical car: 5 yearsabout 28,484 miles
First tests counted: 2,875

What failed most often

Tyre condition (front)27 in every 100 failed tests

How we count this. Data: UK MOT open data, 2025. Only Class 4 cars on their first MOT of the year are counted. A car that fails and is fixed at the test station still counts as a fail in the first-attempt rate. These are raw results, not adjusted for age, mileage, or peer mix. The MOT does not test engine or gearbox internals.

Note:

These are patterns across 2020 Audi TT vehicles in 2025, not a prediction that any one car will have them. Faults are grouped by part of the car. A wear pattern follows age and use more than the way the car was built. They come from MOT defect codes, not manufacturer bulletins, recalls or a diagnosis of any one car.

Tyres

One wear pattern: tyre tread depth (rear), 4.4 times as often as on similar cars.

Figures below are measured across the 236 of 237 failed first attempts (99.6%) that recorded an odometer reading in 2025. Mileage is needed to compare like with like.

We only list faults with at least 20 failures and a rate of about 2.0 times that of similar cars, which keeps one-off results out of the list.

Tyre tread depth (rear)

Failed on 27 first tests4.4 times as often as similar carsWear pattern

What it means

Only primary grooves count when tread depth is assessed: those holding the wear indicators, or cut as deep as those when new. Shallower secondary grooves are ignored. Tread depth below the minimum for the vehicle is Dangerous, and so is a pattern not visible over the whole tread, but that second row applies only to vehicles that need the lower minimum.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 38 first tests, 2.1 times as often as on similar cars.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.

MOT pass rates

How first tests ended, and how the pass rates are counted.

Passed first time: 92in every 100; Passed on the first test.
Fixed at the station: 1in every 100; Failed, then fixed at the test station the same day.
Failed: 7in every 100; Did not pass, and were not fixed at the test station.

First-attempt pass 91.8% of 2,875 first tests (2025): only cars that passed first time count. Official-style pass 92.7%: cars fixed at the test station also count as a pass. The 1 fixed and the 7 not fixed make the 8 in every 100 that did not pass first time.

Same model, other years

Passed first time in every 100, all tested in 2025.

Newer cars are younger, so look for a jump rather than the climb. A year earlier (2024), when these cars were a year younger, 91 in every 100 passed first time.

Year	Passed first time	First tests
2000	61 in every 100	1,374
2001	60 in every 100	2,149
2002	60 in every 100	3,272
2003	60 in every 100	3,830
2004	61 in every 100	3,905
2005	61 in every 100	3,106
2006	60 in every 100	2,550
2007	65 in every 100	7,101
2008	68 in every 100	6,518
2009	71 in every 100	5,533
2010	71 in every 100	6,044
2011	75 in every 100	6,029
2012	81 in every 100	5,350
2013	82 in every 100	6,077
2014	81 in every 100	3,781
2015	85 in every 100	8,229
2016	87 in every 100	8,819
2017	88 in every 100	7,149
2018	89 in every 100	3,934
2019	91 in every 100	4,450
2020 This car	92 in every 100	2,875
2021	92 in every 100	2,357
2022	92 in every 100	2,500

If you are buying one

What this year's MOT record means for the decision in front of you.

Mileage makes a modest difference on a 2020 Audi TT.

Of 2020 Audi TT vehicles with under 19,000 miles, 95 in every 100 passed their 2025 MOT first time. With 41,000 miles or more, 88 in every 100 did.

Under 19,000590 tests

95

19,000–26,000603 tests

92

26,000–32,000 Typical car540 tests

92

32,000–41,000575 tests

91

41,000 and over566 tests

88

What to check at your mileage

How often each fault turned up on a failed first test, by the car's mileage. Read it as: what is likely to need looking at on a car like the one in front of you.

	Under 19,000	26,000–32,000	41,000 and over
Tyre condition (front)	2.0	1.5	3.0

Faults per 100 first tests, by the car's mileage at the test.

Every figure here is a first-attempt MOT rate from DVSA open data for this model line, for cars of this model year tested in 2025. Each mileage band holds a fifth of the tests. MOTs do not test engine or gearbox internals, so this is a pre-purchase checklist, not a full reliability score.

FAQs

Short answers about how to read this model-year guide.

Is the 2020 Audi TT reliable?

The 2020 Audi TT follows the pattern of the model years either side. In 2025, 91.8% of 2,875 first MOTs on the 2020 Audi TT passed first time (PRS: items fixed at the station the same day, counted as a fail). The official-style rate including PRS is 92.7%. Among 237 failed first-attempt MOT tests (test year 2025), we highlight MOT failure patterns that show up more often than on cars of a similar age and mileage when the sample is large enough to trust. There is no single reliability score here; this is a pre-purchase checklist built from DVSA open data, not a guarantee for any individual car.

What is most likely to fail on a 2020 Audi TT?

Ranked by how often they were actually recorded, the items that most often failed a 2020 Audi TT at the first attempt were Tyre condition (front) (27.1%), each as a share of the year's failed first attempts. That is what goes wrong most often on the car. The common faults table shows a different measure: faults that are unusual compared with similar cars.

What does this Audi TT 2020 MOT report cover?

This page highlights MOT failure patterns for the 2020 Audi TT (registration year) using UK DVSA open data for the selected test year. Patterns are compared with cars of a similar age and mileage. It is a buyer checklist from MOT defect statistics, not a full service history or manufacturer service-bulletin list.

Does this include engine and gearbox problems?

No. MOT tests do not cover engine internals, gearboxes, or many electronic modules. Patterns here come from MOT defect statistics only and should not be read as engine or gearbox reliability scores.

About this data

How this page is built and what it can (and can't) say.

These figures come from UK MOT open data for this model year. We surface common failure patterns against similar cars, not a full reliability score, and not a pass/fail verdict on any individual vehicle.

2024 2025

What we include

UK Class 4 cars only. Normal MOT tests (not retests); first test per vehicle per calendar year; results pass, PRS, or fail.

Same-day repairs

PRS means the car failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

How we compare

We compare this model year with other Class 4 cars of similar age and mileage in the same test year. This model family is left out of the peer group so the car is not measured against itself.

What this does not cover

MOTs do not cover engine internals, gearboxes, or many electronics; this is not a full reliability score.
Common faults come from MOT defect stats, not manufacturer TSBs or recalls.
Age and mileage matching reduces, but does not remove, differences in how cars were used and maintained.
If the data for a car is too thin to say anything useful, we say so rather than guess.

Contains public sector information licensed under the Open Government Licence v3.0.