Engine Volkswagen BDH

The 2.5-liter diesel engine Volkswagen BDH 2.5 TDI was produced from 2004 to 2006 and was installed on the Passat B5, as well as such Audi models as the A6 C5 and the convertible based on the A4 B6. This power unit is essentially an updated version of the famous BAU engine to EURO 4.

The EA330 series also includes: AFB, AKE, AKN, AYM, BAU, BDG, BDH.


Production years 2004-2006
Displacement, cc 2496
Fuel system direct injection
Power output, hp 180
Torque output, Nm 370
Cylinder block cast iron V6
Block head aluminum 24v
Cylinder bore, mm 78.3
Piston stroke, mm 86.4
Compression ratio 18.5
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 4
Fuel consumption, L/100 km (for Volkswagen Passat 4WD 2005)
— city
— highway
— combined
Engine lifespan, km ~320 000

The engine was installed on:

  • Audi A4 B6 Cabrio in 2004 – 2006;
  • Audi A6 C5 (4B) in 2004 – 2005;
  • Volkswagen Passat B5 (3B) in 2004 – 2005.

Disadvantages of the VW BDH engine

  • Most of the problems for owners are caused by malfunctions in the capricious VP44 injection pump;
  • Updated hollow camshafts often burst on runs of 150 – 250 thousand km;
  • Also, grease constantly oozes from the joints of the motor and from under the valve covers;
  • In the turbine, the geometry mechanism often wedges, the viscous coupling bearing does not last long;
  • From low-quality oils, hydraulic lifters and pressure reducing valves can seize.

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