The popular A4 model in the B6 body was equipped with the 1.8-liter turbocharged Audi AMB 1.8T engine, which was manufactured at the factory between 2000 and 2005, but only in the American market version.

The EA113-1.8T series includes: AGU, AWT, AMB, AWM, AUQ, AWC.
Specifications
| Production years | 2000-2005 |
| Displacement, cc | 1781 |
| Fuel system | injector |
| Power output, hp | 170 |
| Torque output, Nm | 225 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 20v |
| Cylinder bore, mm | 81 |
| Piston stroke, mm | 86.4 |
| Compression ratio | 9.3 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | chain & belt |
| Phase regulator | no |
| Turbocharging | KKK K03 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 3.7 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Audi A4 2002) — city — highway — combined |
11.3 6.4 8.2 |
| Engine lifespan, km | ~330 000 |
The engine was installed on:
- Audi A4 B6 (8E) in 2000 – 2005.
Disadvantages of the Audi AMB engine
In this case, oil coking in the supply pipes frequently causes the turbine to fail;
Air leakage in the intake is the primary cause of floating engine speeds.
The crankcase ventilation failure is the primary cause of the carbon deposits’ quick formation;
The resource of ignition coils with integrated switches is low.
The secondary air system, N75 valve, and coolant temperature sensor are the motor’s weak points.
