The 2.5-liter Audi AFB 2.5 TDI diesel engine was assembled by the company from 1997 to 1999 and installed on such popular models as the A4 B5, A6 C5, A8 D2 and Volkswagen Passat B5. After upgrading to more modern environmental standards EURO 3, the diesel engine changed its index to AKN.
EA330 family: AFB, AKE, AKN, AYM, BAU, BDG, BDH.
Specifications
| Production years | 1997-1999 |
| Displacement, cc | 2496 |
| Fuel system | direct injection |
| Power output, hp | 150 |
| Torque output, Nm | 310 |
| Cylinder block | cast iron V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 78.3 |
| Piston stroke, mm | 86.4 |
| Compression ratio | 19.5 |
| Features | 2 x DOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | VGT |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.0 |
| Fuel type | diesel |
| Euro standards | EURO 2 |
| Fuel consumption, L/100 km (for Audi A6 C5 1998) — city — highway — combined |
9.9 5.3 7.0 |
| Engine lifespan, km | ~250 000 |
The engine was installed on:
- Audi A4 B5 (8D) in 1997 – 1999;
- Audi A6 C5 (4B) in 1997 – 1999;
- Audi A8 D2 (4D) in 1997 – 1999;
- Volkswagen Passat B5 (3B) in 1998 – 1999.
Disadvantages of the Audi AFB engine
- The most famous problem is the rapid wear of the camshaft cams and rockers;
- In second place there are failures in the operation of the Bosch VP44 electronically controlled high-pressure fuel pump;
- The crankcase ventilation filter clogs quickly and needs to be cleaned constantly;
- The outdated film-type MAF is distinguished by low reliability in the engine;
- The motor is prone to oil leaks at the joints of the block with the sump and from under the valve cover.
Frequently asked questions about the Audi AFB
How much power does the Audi AFB make?
The Audi AFB develops 150 hp and 310 Nm of torque.
How much oil does the Audi AFB take and which one?
Engine oil capacity: 6.0 liters. Recommended oil: 5W-30.
Does the Audi AFB have a timing belt or chain?
The Audi AFB uses a timing belt.
Is the Audi AFB turbocharged?
Yes, the Audi AFB is turbocharged (VGT).
Does the Audi AFB need valve clearance adjustment?
No, the Audi AFB has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi AFB last?
The typical lifespan of the Audi AFB is ~250 000 km with proper maintenance.
What is the fuel consumption of the Audi AFB?
Audi A6 C5 1998: city 9.9, highway 5.3, combined 7.0 L/100 km.
What cars was the Audi AFB installed on?
Audi A4 B5 (8D) in 1997 - 1999; Audi A6 C5 (4B) in 1997 - 1999; Audi A8 D2 (4D) in 1997 - 1999; Volkswagen Passat B5 (3B) in 1998 - 1999.
What are the common problems of the Audi AFB?
The most famous problem is the rapid wear of the camshaft cams and rockers. In second place there are failures in the operation of the Bosch VP44 electronically controlled high-pressure fuel pump. All known problems.
