Fault File
All models / All cars / Coupés, convertibles & GT / Audi TT

Audi TT

All generations and engines together · 71,119 MOT tests in the 2025 data · typical mileage at age 7: 49k

First-time failure at age 7
11.6%
Across 6,238 tests. The average across all tracked models is 19.5%.
Rank at age 7
17 of 239
1 = lowest failure rate among the models tracked.
Typical mileage at age 7
49k miles
Check the mileage view below; low-mileage models can look better by age than they are.

Generation

Split by first-registration year. Cars registered in a changeover year can belong to either generation.

How this model wears

Audi TTClass average, all tracked models

Known issues

Measured

Computed from DVSA MOT results, all of Great Britain, 2025. Nothing here is opinion.

What testers flag

Share of tests where each item was recorded. The dark tick is the class average across all tracked models; bars are scaled within each group.

Faults with the car itself

The rows that judge the model rather than its keeper. 27,156 tests in this band.

A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
Advisory
3.6%class 2.3%
A suspension component excessively damaged or corroded
Advisory
2.6%class 0.7%
A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
Fail
1.1%class 0.4%
Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users
Advisory
1.0%class 2.0%
A suspension pin, bush or joint excessively worn
Advisory
0.7%class 5.9%
A brake hose ferrule excessively corroded
Advisory
0.7%class 0.4%
A spring or spring component fractured or seriously weakened
Advisory
0.6%class 1.3%

Wear, upkeep and luck

Tyres, pads and stone chips say more about how the car was driven and maintained than about how it was built.

Tyre tread depth not in accordance with the requirements
Advisory
28.4%class 22.9%
Brake disc or drum excessively weakened, insecure or fractured
Advisory
16.2%class 10.1%
A tyre seriously damaged
Advisory
13.6%class 13.4%
A brake lining or pad worn below 1.5mm
Advisory
10.4%class 8.7%
Tyre tread depth not in accordance with the requirements
Fail
3.2%class 2.2%
Nail in tyre
Advisory
2.8%class 1.6%
Brake disc or drum significantly and obviously worn
Advisory
2.5%class 3.4%
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
Minor
2.5%class 2.0%

Unconfirmed issues

Reported

Owner folklore from forums and the motoring press. Most of it never shows up in an MOT, which is why this section exists at all.

Cam follower wearing through, killing the fuel pump

Confirmed pattern

On the 2.0 TFSI (EA113 engine, most Mk2 cars up to around 2008) a small follower that drives the high-pressure fuel pump wears down, and the metal it sheds gets pumped straight through the engine. The tell is a metallic ticking or rattling from the top of a warm engine, sometimes with a fuel pressure fault code. Audi later revised the follower to a harder-wearing part, but plenty of early cars are still running the original design. Caught early it's a £150-£300 follower-and-pump job; ignored, it can take the camshaft and bearings with it, more like £1,500-£2,500.

Reported from 40-60k miles · sources: vwtuning.co, Engine Patrol, Audi Breaker Yards

Coil packs giving up one at a time

Emerging

Both the 1.8T and 2.0 TFSI engines are known for coil packs failing in ones and twos rather than all at once, usually showing up as a rough idle, a flashing engine light, or a misfire under load. It isn't officially recognised as a design fault, it's just something that keeps coming up in forums and used-car write-ups. Parts are cheap on their own, but labour and diagnosis at a dealer can push a full set replacement to £150-£300.

Reported from 60k miles onward · sources: vwtuning.co, Engine Patrol, Audi Breaker Yards

Plastic-impeller water pump wearing out

Emerging

The water pump impeller on these engines is plastic and wears or cracks over time, usually announcing itself as a slow coolant leak, a sweet smell, or the temperature gauge creeping up in traffic. It's a wear item rather than a scandal, but it turns up across the whole model range rather than one engine. Budget £400-£1,200 for the pump, coolant and labour depending on where it sits in the engine bay.

Reported 60-80k miles · sources: Audi Breaker Yards, au7o.io

S tronic mechatronic unit and clutch pack wear

Automatics only

On S tronic (twin-clutch automatic) cars the mechatronic control unit and its wet clutch packs can wear out, showing up as hesitation from a standstill, harsh or jerky upshifts, or the gearbox dropping into limp mode. It doesn't affect manual TTs at all. Repairs range from a clutch pack and fluid service around £600-£1,000 up to £2,000-£3,000 for a full mechatronic unit.

Reported from 60k miles · sources: Audi Breaker Yards, au7o.io, Engine Patrol

Magnetic Ride dampers leaking

Partly in the MOT data

Cars fitted with the optional Magnetic Ride adaptive suspension (TTS, TT RS and higher trims) are widely reported to leak damper fluid after five or six years, with the ride firming up unevenly or losing its adaptive feel. That lines up with the measured MOT signature for this model, where suspension stands out as the top defect category against other coupes and sports cars. The forums pin the blame specifically on the magnetic dampers; the MOT data can't tell a leaking Magnetic Ride damper from a tired standard one, so treat the link as likely rather than proven. All four corners usually need doing together, £2,000-£3,000.

Reported at 5-6 years / 50k+ miles · sources: Audi Breaker Yards, au7o.io

Window regulators, tail lights and cluster niggles

Emerging

A scatter of electrical niggles keeps coming up across the range: window regulators slowing down or sticking, tail light connectors corroding so one side dims or cuts out, and early cars showing dead pixels or odd readings on the instrument cluster. None of it strands you, but it's the kind of small annoying bill that adds up over a few years of ownership. Expect £70-£250 per fix depending on the part and whether it's done independently or at a dealer.

Reported across ownership, no single mileage pattern · sources: Audi Breaker Yards, au7o.io, Haynes

Viewing one? Ask this

Built from the two sections above.

Start the engine from cold, let it idle a minute, then rev it gently once warm. A rough idle or a flashing engine light points to a failing coil pack.
Listen for a metallic tick or rattle from the top of the engine once it's warm. On a 2.0 TFSI this is the classic sign of cam follower wear eating into the fuel pump.
Check the coolant level and look underneath for a sweet-smelling leak or pink or green residue near the pump. A slow drip means the plastic water pump impeller is on its way out.
On an S tronic car, do a full-throttle standing start and a couple of hard upshifts. Hesitation, shudder or a harsh clunk into gear means the mechatronic unit or clutch packs are wearing.
If it has Magnetic Ride, push down hard on each corner and check underneath for oily residue on the damper body. Visible fluid means that corner's damper is leaking, and the full set usually needs replacing together.
Cycle every window up and down twice and check both tail lights light up evenly. Slow regulators or a dim tail light point to the electrical niggles owners report most.
Pull the full MOT history, not just the pass or fail summary. Repeated suspension advisories back up the pattern in the data and show whether anyone's actually fixed it.

Others in its class

Same segment (Coupés, convertibles & GT), best MOT record first. Compare before you shortlist.

How it compares

Head to head with the other popular cars in its class on reliability and common faults.