Engine Audi BFL

The 3.7-liter V8 Audi BFL engine was produced at the concern’s enterprises from 2002 to 2006 and was installed only on the pre-restyling modification of the A8 executive sedan in the D3 body. This engine was distinguished from its predecessor by the presence of new cylinder heads with 5 valves per cylinder.

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


Production years 2002-2006
Displacement, cc 3697
Fuel system distributed injection
Power output, hp 280
Torque output, Nm 350
Cylinder block aluminum V8
Block head aluminum 40v
Cylinder bore, mm 84.5
Piston stroke, mm 82.4
Compression ratio 11.0
Features 5V
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 3.7 quattro 2004)
— city
— highway
— combined
Engine lifespan, km ~300 000
Weight, kg 197

The engine was installed on:

  • Audi A8 D3 (4E) in 2002 – 2006.

Disadvantages of the Audi BFL engine

  • This is a reliable and very durable power unit, but only with proper care;
  • Bad fuel and overheating cause scuffing in the cylinders, because there are no liners there;
  • It is very important to monitor the condition of the timing belt, since if it breaks, the valves bend;
  • Camshaft gears and hydraulic chain tensioners have a low service life;
  • And the plastic rods of the dampers in the intake manifold regularly break off;
  • Weak points also include the crankshaft rear oil seal and the crankcase ventilation valve membrane.

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