From 2004 to 2010, the company assembled and installed the 3.2-liter 24-valve Audi AUK 3.2 FSI engine on popular German models, including the A4 B7, A6 C6, and A8 D3. This power unit has multiple simultaneous analogues with different BYU, BKH, and BPK indices.
The EA837 series includes: BDW, AUK, BDX, CAJA, CGWA, CGWB, CREC.
Specifications
| Production years | 2004-2010 |
| Displacement, cc | 3123 |
| Fuel system | direct injection |
| Power output, hp | 256 |
| Torque output, Nm | 330 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 84.5 |
| Piston stroke, mm | 92.8 |
| Compression ratio | 12.5 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on all shafts |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.5 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Audi A6 2005) — city — highway — combined |
15.7 9.7 10.9 |
| Engine lifespan, km | ~260 000 |
The engine was installed on:
- Audi A4 B7 (8E) in 2004 – 2009;
- Audi A6 C6 (4F) in 2004 – 2008;
- Audi A8 D3 (4E) in 2005 – 2010.
Disadvantages of the Audi AUK engine
Seizures in the cylinders are the most common issue with units in this series.
These pistons are frequently replaced with forged ones because they are prone to rings and oil burns.
Timing chains are frequently stretched and their tensioners break in this situation as well.
A complicated intake system with two sets of dampers is not well-known for its dependability.
Soot and compression drops in the engine cylinders rapidly clog intake valves.