Before you buy a used Audi TT (8S).
Taken only from Testigo's sourced sheets. Use it to question the seller and on the test drive: it does not confirm that any particular car is affected.
The essentials.
- 5 documented, sourced faults across its 4 engines.
- 3 of them depend on the equipment or the production date: ask what this car has.
- 1 official recall on record: ask for the chassis number (VIN) and confirm it has been done.
- According to the data we have, the engine with the fewest documented faults is the TT RS (2.5 TFSI) (Petrol).
Typical faults by engine
The period and mileage are those mentioned by each sheet's sources. They are not a maintenance interval and do not predict that any particular car will fail.
All versions
Sheets the catalogue links to all 4 of its engines.
- A/C not cooling: N280 valveClimate control
- Period mentioned
- 2006–2026
- Mileage mentioned
- The sheet does not mention a mileage.
Applies if: Only if fitted with the air conditioning system described.
- Haldex all-wheel-drive coupling pumpTransmission
- Period mentioned
- 2007–2020
- Mileage mentioned
- The sheet does not mention a mileage.
Applies if: Only all-wheel-drive versions (4Motion, transverse-engine quattro, 4x4 or 4Drive) with a 4th or 5th generation Haldex coupling.
2.0 TFSI · TTS (2.0 TFSI)
Petrol
- Period mentioned
- 2012–2020
- Mileage mentioned
- Up to 100,000 km
- DQ250 DSG mechatronic and oilDSG gearbox
- Period mentioned
- 2003–2020
- Mileage mentioned
- From 60,000 km
Applies if: Only if fitted with the 6-speed DQ250 DSG. Confirm the gearbox type.
2.0 TDI
Diesel
- Cracked EGR coolerCooling / EGR
- Period mentioned
- Approx. 2010–2020
- Mileage mentioned
- The sheet does not mention a mileage.
These also apply, described above: DQ250 DSG mechatronic and oil
TT RS (2.5 TFSI)
Petrol
We have no faults specific to this engine, only those common to every version.
Which engine has the fewest documented faults?
| Engine | Documented faults | Recalls |
|---|---|---|
| 2.0 TFSIPetrol | 43 with conditions | 0 |
| 2.0 TDIDiesel | 43 with conditions | 0 |
| TTS (2.0 TFSI)Petrol | 43 with conditions | 0 |
| TT RS (2.5 TFSI)PetrolFewest documented | 22 with conditions | 1 |
According to the data we have, the engine with the fewest documented faults is the TT RS (2.5 TFSI) (Petrol).
By fuel, all versions have the same number of documented faults.
We only count the sourced sheets we have. An engine with fewer is not guaranteed to be more reliable: it may have been studied less or sold in smaller numbers.
Official recalls: ask before you pay
A recall existing does not mean this car is affected or that it is still outstanding: it depends on the chassis number, the market and the production date.
- Ask the seller for the chassis number (VIN): it has 17 characters, appears in the car's documents and can usually also be seen at the base of the windscreen.
- Ask an official Audi dealer, or the brand's official website if it lets you check by chassis number, whether each recall has been done or is still outstanding for that VIN.
- Manufacturer recalls are normally carried out free of charge by the official service network. If one is outstanding, ask for it to be done before you close the sale.
Airbag inflator deterioration due to moisturePassive safety
Engines: TT RS (2.5 TFSI) (Petrol)
How to check it: Check VIN; replace the inflator or module specified by the recall.
View full entryOn the test drive: what to look and listen for
Taken from each sheet's symptoms and checks. You can tick off what you have already looked at: it is saved only in this browser.
0 of 5 checked
Cooling
Look out for: Slow coolant loss, sweet smell, low-coolant warning and coolant residue under the intake manifold. Overheating is rare unless the level drops a lot.
Ask them to check: Look for coolant residue where the module meets the block and between pump and thermostat, check the level and pressure-test the system.
Cooling / EGR
Look out for: Coolant level drops with no visible leak, white smoke with a sweet smell, rising temperature or engine light. In severe cases the engine hydrolocks.
Ask them to check: Cooling system pressure test and check for coolant in the intake or manifold.
DSG gearbox
Look out for: Jerking or shudder when pulling away and at low speed, harsh shifts, gearbox warning or limp mode; codes P17BF, P189C, P0841, P0871 or P0717.
Ask them to check: Read codes with ODIS or VCDS, check the oil change history, inspect the pan for rust or leaks and the clutch adaptation values. Replacing the mechatronic control board is often enough.
Climate control
Look out for: The air does not cool or cools intermittently (for example only at motorway speed), and sometimes the compressor rattles with the A/C on. Codes 01232 (N280 valve), P2612 or 00898.
Ask them to check: Read the codes and N280 control current with VCDS or ODIS, measure its resistance (about 10 ohms) and check the connector and wiring before replacing parts. If the valve or compressor is replaced, the whole circuit must be flushed.
Transmission
Look out for: All-wheel-drive warning or a pump error in diagnostics, the car behaves like front-wheel drive (wheelspin in the wet or on gravel) and sometimes no cluster warning even with stored codes.
Ask them to check: Read the all-wheel-drive module with VCDS, OBDeleven or ODIS (ODIS shows the pump current) and check in the history when the oil was changed and whether the filter was replaced and the strainer cleaned. After servicing, an adaptation with diagnostic equipment is recommended on generations 4 and 5.
Sources
Every fact on this page comes from these Testigo sheets and their original sources. Sources are not checked in real time.
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