Engine Volkswagen BDN

The 4.0-liter Volkswagen BDN or Passat W8 4.0 engine was produced from 2001 to 2004 and was installed only on the maximum version of the restyled Passat B5 4.0 W8 4motion. On this model, there is another modification of this power unit under the BDP index.

The EA398 series includes: BHT, BRN, CEJA, BDN.


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
Engine lifespan, km ~240 000

The engine was installed on:

  • Volkswagen Passat B5 (3B) in 2001 – 2004.

Disadvantages of the VW BDN engine

  • You need to carefully monitor the cooling system, as the motor is afraid of overheating;
  • Due to frequent overheating and bad oil, scuffing quickly forms in the cylinders;
  • In the lifted cylinders, oil waste begins, which is fraught with the rotation of the liners;
  • About 200,000 km of run require the attention of the timing chain and you will have to remove the unit;
  • The weak points of the engine also include ignition coils, pump, wiring between the computer.

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