Only the maximum version of the redesigned Passat B5 4.0 W8 4motion was equipped with the 4.0-liter Volkswagen BDN or Passat W8 4.0 engine, which was manufactured between 2001 and 2004. Another modification of this power unit under the BDP index exists on this model.
BHT, BRN, CEJA, and BDN are all part of the EA398 series.
Specifications
| Production years | 2001-2004 |
| Displacement, cc | 3999 |
| Fuel system | distributed injection |
| Power output, hp | 275 |
| Torque output, Nm | 370 |
| Cylinder block | aluminum W8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 84 |
| Piston stroke, mm | 90.2 |
| Compression ratio | 10.8 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on the intake and exhaust |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 8.3 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for VW Passat 2002) — city — highway — combined |
19.4 9.5 12.9 |
| Engine lifespan, km | ~240 000 |
The engine was installed on:
- Volkswagen Passat B5 (3B) in 2001 – 2004.
Disadvantages of the VW BDN engine
The motor is afraid of overheating, so you must keep a close eye on the cooling system;
Scuffing rapidly develops in the cylinders as a result of frequent overheating and poor oil;
Oil waste starts in the raised cylinders, which is complicated by the liners’ rotation;
The timing chain needs to be adjusted after about 200,000 kilometers, at which point the unit must be removed;
Additionally, the engine’s pump, ignition coils, and computer wiring are weak points.