Engine Audi BFM

The company assembled the 4.2-liter Audi BFM or A8 D3 4.2 quattro engine from 2002 to 2006 and installed it only on all-wheel drive modifications of the famous A8 sedan in the D3 body. There was a version of this power unit with a volume of 3.7 liters and its own BFL index.

The EA824 series includes: AEW, ABZ, BFM, AXQ, BVJ, CDRA, BAR, CRDB, CEUA.


Production years 2002-2006
Displacement, cc 4172
Fuel system distributed injection
Power output, hp 335
Torque output, Nm 430
Cylinder block aluminum V8
Block head aluminum 40v
Cylinder bore, mm 84.5
Piston stroke, mm 93
Compression ratio 11.0
Features no
Hydraulic lifters yes
Timing drive belt & 2 chains
Phase regulator yes
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 7.5
Fuel type petrol
Euro standards EURO 4
Fuel consumption, L/100 km (for Audi A8 quattro 2004)
— city
— highway
— combined
Engine lifespan, km ~300 000

The engine was installed on:

  • Audi A8 D3 (4E) in 2002 – 2006.

Disadvantages of the Audi BFM engine

  • Despite the aluminum block, seizures in the cylinders are rare here.
  • However, with savings on oil and frequent overheating, they will not keep you waiting.
  • Most of the problems here are delivered by unreliable hydraulic timing chain tensioners.
  • Try to monitor the condition of the timing belt, or if it breaks, the valves will bend.
  • Oil leaks are also common, especially at the junction of the engine with the gearbox.

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