
Volkswagen AUQ
The main reason for the unstable operation of the engine is the constant air leakage through the crankcase ventilation.
The Audi TT is a German compact coupe passenger car from the manufacturer Audi AG. It began production in 1998 in body modifications: a 2-door 4-seater coupe and a 2-seater roadster. The production of modern copies of cars is carried out at factories in Germany and Hungary. In 2015, the third generation of the TT Roadster model was released, equipped with a special sports engine of 220 hp. with. and an all-wheel drive system. The abbreviation in the name of the model comes from the abbreviated name “Tourist Trophy” – the famous British auto race at the beginning of the XX century.
The Audi TT was offered with 12 engines between 2001 and 2018 (10 petrol, 2 diesel). Displacement ranges from 1.8 to 3.2 liters, power output from 160 to 340 hp. 10 use a timing chain and 5 a timing belt. 11 are turbocharged. The longest rated lifespan belongs to the Audi CFGB (about 300,000 km).
| Engine | Years | Volume | Power | Fuel | Timing | Oil | Lifespan |
|---|---|---|---|---|---|---|---|
| Audi TT 1 (8N) 2001–2005 | |||||||
| Volkswagen AUQ | 2001–2005 | 1.8 L R4 | 180 hp | petrol, turbo | chain + belt | 4.5 L | ~300,000 km |
| Audi TT 2 (8J) 2006–2014 | |||||||
| Volkswagen BUB | 2006–2010 | 3.2 L | 250 hp | petrol | chain | 5.5 L | ~275,000 km |
| Volkswagen BWA | 2006–2008 | 2.0 L R4 | 200 hp | petrol, turbo | chain + belt | 4.6 L | ~260,000 km |
| Volkswagen CCZA | 2008–2010 | 2.0 L R4 | 200 hp | petrol, turbo | chain | 4.6 L | ~275,000 km |
| Volkswagen CDAA | 2008–2014 | 1.8 L R4 | 160 hp | petrol, turbo | chain | 4.6 L | ~250,000 km |
| Audi CCTA | 2008–2010 | 2.0 L R4 | 200 hp | petrol, turbo | chain | 4.6 L | ~250,000 km |
| Volkswagen CBFA | 2008–2010 | 2.0 L R4 | 200 hp | petrol, turbo | chain | 4.6 L | ~280,000 km |
| Volkswagen CDL | 2008–2014 | 2.0 L R4 | 220–280 hp | petrol, turbo | chain + belt | ||
| Audi CFGB | 2009–2014 | 2.0 L R4 | 170 hp | diesel, turbo | belt | 4.3 L | ~300,000 km |
| Audi CEPA | 2009–2014 | 2.5 L R5 | 340 hp | petrol, turbo | chain | 6.5 L | ~220,000 km |
| Audi TT 3 (8S) 2014–2018 | |||||||
| Volkswagen CUNA | 2014–2018 | 2.0 L R4 | 184 hp | diesel, turbo | belt | 4.7 L | ~300,000 km |
| Volkswagen CJSA | 2015–2018 | 1.8 L R4 | 180 hp | petrol, turbo | chain | 5.2 L | ~260,000 km |
Audi TT 1 (8N) (2001–2005): Volkswagen AUQ; Audi TT 2 (8J) (2006–2014): Volkswagen BUB, Volkswagen BWA, Volkswagen CCZA, Volkswagen CDAA, Audi CCTA, Volkswagen CBFA, Volkswagen CDL, Audi CFGB and Audi CEPA; Audi TT 3 (8S) (2014–2018): Volkswagen CUNA and Volkswagen CJSA.
By rated service life the most durable Audi TT engines are: Audi CFGB — about 300,000 km; Volkswagen AUQ — about 300,000 km; Volkswagen CUNA — about 300,000 km. Actual lifespan depends heavily on maintenance and oil change intervals.
Engine oil capacity with filter: Audi CCTA — 4.6 L (5W-30); Audi CEPA — 6.5 L (5W-30); Audi CFGB — 4.3 L (5W-30); Volkswagen AUQ — 4.5 L (5W-30); Volkswagen BUB — 5.5 L (5W-30); Volkswagen BWA — 4.6 L (5W-30); Volkswagen CBFA — 4.6 L (5W-30); Volkswagen CCZA — 4.6 L (5W-30); Volkswagen CDAA — 4.6 L (5W-30); Volkswagen CJSA — 5.2 L (5W-30); Volkswagen CUNA — 4.7 L (5W-30).
Timing chain: Audi CCTA, Audi CEPA, Volkswagen AUQ, Volkswagen BUB, Volkswagen BWA, Volkswagen CBFA, Volkswagen CCZA, Volkswagen CDAA, Volkswagen CDL and Volkswagen CJSA; timing belt: Audi CFGB, Volkswagen AUQ, Volkswagen BWA, Volkswagen CDL and Volkswagen CUNA. Belts must be replaced on schedule: on many engines a broken belt bends the valves.
Yes: Audi CFGB and Volkswagen CUNA.

The main reason for the unstable operation of the engine is the constant air leakage through the crankcase ventilation.

Firstly, the power units of this series consume unreasonably much fuel.

Most often, owners complain about oil consumption and increased soot formation.

Over the entire period of production, the motor has been modernized more than once and its reliability has grown.

The main complaints are related to the short resource of the timing chain, sometimes less than 100,000 km.

Most of all, the owners complain about the oil burner due to the occurrence of piston rings.

The most famous problem of this motor is the oil burner due to the occurrence of rings.

The cam follower of the high-pressure fuel pump wears and can damage the camshaft lobe if it is not replaced in time.

The timing chain has a modest resource here, often it stretches to 100,000 km.

The Bosch fuel system with electromagnetic injectors has a long service life.

The most serious engine failures are associated with a drop in oil pressure in the system.

Oil leaks from the crankshaft seal and coolant leaks from the intake intercooler are common.