Instrument cluster faults
usually 120,000–250,000 km · Wear part
Signs: Gauges or display drop out
Fix: Repair the cluster
€150–400
Common faults, service intervals and costs
Audi TT (8N)
1998–2006
1
engines covered
10
known faults
24,291
roadworthiness tests in the statistics
4
official recalls
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
The Audi TT (8N) was built from 1998 to 2006.
For this generation we cover 1 engines and 10 known faults, each with the mileage range where it usually appears.
The most expensive known risk is DCT mechatronic / solenoids: it usually appears at 120,000–220,000 km and costs €800–2,000 to fix.
In UK roadworthiness tests in 2024, at 150–200 thousand km this model most often failed on: lights, wipers and visibility (22.5 %), suspension (16.1 %), brakes (12.9 %). It fails more often than an average car of the same age and mileage on: exhaust, emissions and leaks.
Engines
| Engine | Fuel | Timing drive | Oil |
|---|---|---|---|
| 1.8 T 20v (EA113) | Petrol | Belt · 90,000 km / every 60 mo | 5W-40 / 5W-30 · VW 502.00 / 504.00 · ~4.0–4.5 L · every 10,000 km |
Faults typical of this model
Door lock microswitch / central locking
usually 100,000–220,000 km · Wear part
Signs: Doors don't lock, 'door open' warning
Fix: Replace the lock unit
€80–250
Window regulator cables
usually 100,000–220,000 km · Wear part
Signs: Window drops or jams
Fix: Replace the regulator
€80–200
Faults by engine
1.8 T 20v (EA113)
Ignition coils (2001–2003)
usually 60,000–160,000 km · Medium risk
Signs: Misfire, flashing engine light
Fix: Replace coils (updated part)
€100–300
Oil sludge → turbo failure
usually 120,000–220,000 km · High risk
Signs: Oil light, smoke, turbo whine — worse with long oil intervals
Fix: Clean the oil pickup, synthetic oil every 10,000 km, replace turbo
€600–1,800
PCV / breather hoses cracked
usually 100,000–180,000 km · Wear part
Signs: Whistle, lean codes, oil leaks
Fix: Replace the PCV hose kit
€80–250
Water pump (plastic impeller)
usually 90,000–150,000 km · Medium risk
Signs: Overheating
Fix: Use a metal-impeller pump at the belt change
€0–150
Gearboxes
Manual
Clutch wear
usually 120,000–200,000 km · Medium risk
Signs: Slipping, high bite point
Fix: Replace clutch kit
€500–900
Automatic (Aisin / ZF Tiptronic)
Torque converter / valve body
usually 150,000–250,000 km · Wear part
Signs: Delayed or harsh shifts
Fix: Fluid service, repair
€300–2,500
DSG / S tronic (wet clutch: DQ250 / DQ381 / DL501)
DCT mechatronic / solenoids
usually 120,000–220,000 km · Medium risk
Signs: Harsh shifts
Fix: Repair; keep oil changes at 60,000 km
€800–2,000
Scheduled service
Intervals and typical prices for the 1.8 T 20v (EA113) engine. Other engines differ in oil, timing drive and some filters; the app gives the exact plan.
| Item | Interval | Typical price |
|---|---|---|
| Engine oil + oil filterEngine | every 10,000 km or every 12 months | €70–150 |
| Cabin (pollen) filterClimate | every 15,000 km or every 12 months | €15–40 |
| Brake fluidBrakes | every 24 months | €50–95 |
| A/C service (regas + desiccant)Climate | every 24 months | €70–150 |
| Air filterEngine | every 30,000 km or every 24 months | €15–45 |
| Spark plugsIgnition | every 60,000 km or every 48 months | €50–160 |
| Timing belt kit + water pumpEngine | every 90,000 km or every 60 months | €450–900 |
| Auxiliary (serpentine) beltEngine | every 120,000 km | €70–180 |
| Coolant replacementCooling | every 150,000 km or every 96 months | €70–150 |
| Manual gearbox oilTransmission | every 150,000 km | €60–130 |
| Front brake padsBrakes | usually at 30,000–60,000 km | €60–150 |
| Front brake discs + padsBrakes | usually at 60,000–120,000 km | €150–320 |
| Rear brake padsBrakes | usually at 50,000–90,000 km | €50–130 |
| Tyres (set of 4)Wheels | usually at 40,000–60,000 km | €320–700 |
| Wiper bladesBody | checked at service | €20–50 |
| 12V batteryElectrical | checked at service | €100–220 |
Roadworthiness tests by mileage
Share of tests in the United Kingdom (DVSA MOT, 2024) that this model failed because of each system. Bold red means more often and green less often than an average car of the same age and mileage. Sample: 24,291 tests.
| thousand km | 50–100 | 100–150 | 150–200 | 200–250 | 250+ |
|---|---|---|---|---|---|
| Brakes | 6.1 % | 10.3 % | 12.9 % | 14.0 % | 15.7 % |
| Suspension | 8.9 % | 13.5 % | 16.1 % | 16.3 % | 16.5 % |
| Steering | 1.1 % | 2.8 % | 3.8 % | 5.5 % | 6.2 % |
| Tyres and wheels | 3.6 % | 6.0 % | 7.6 % | 8.5 % | 8.9 % |
| Lights, wipers and visibility | 11.1 % | 18.4 % | 22.5 % | 24.5 % | 25.2 % |
| Body and corrosion | 2.9 % | 7.5 % | 10.1 % | 10.4 % | 10.7 % |
| Exhaust, emissions and leaks | 3.9 % | 7.8 % | 10.8 % | 13.4 % | 15.3 % |
Owner complaints in the US
Which systems owners reported to the US agency NHTSA and at what mileage. Complaints are not confirmed faults and some relate to recalls. Sample: 220 complaints.
Official recalls
Recalls the manufacturer published in the United Kingdom for this model (4). The same recalls usually apply across Europe. Ask an authorised dealer to check by VIN whether your car is affected and whether the work has been done.
- Airbag The deployment of the takata airbag may be delayed or insufficiently powerful due to a potential reduction in the performance of the gas generator22/09/2021 · R/2021/234
- Airbag Function of the driver airbag might be restricted due to its age22/09/2021 · R/2021/330
- Airbag Airbag may not deploy26/10/2002 · R/2002/143
- Steering Instability and loss of directional control could occur17/04/2000 · R/2000/008
Other generations
Sources and notes
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles.
Updated 07/10/2026