Engine Audi CGWB

The 3.0-liter Audi CGWB 3.0 TFSI gasoline engine was assembled at the factory from 2010 to 2012 and installed on all-wheel drive versions of the popular A6 and A7 models in the C7 body before restyling. There was also a more powerful version of this power unit under a different CGWD index.

The EA837 series includes: BDW, AUK, BDX, CAJA, CGWA, CGWB, CREC.


Production years 2010-2012
Displacement, cc 2995
Fuel system direct injection
Power output, hp 300
Torque output, Nm 440
Cylinder block aluminum V6
Block head aluminum 24v
Cylinder bore, mm 84.5
Piston stroke, mm 89
Compression ratio 10.5
Features DOHC
Hydraulic lifters yes
Timing drive 4 chains
Phase regulator on the intake shaft
Turbocharging compressor
Recommended engine oil 5W-30
Engine oil capacity, liter 6.5
Fuel type petrol
Euro standards EURO 5
Fuel consumption, L/100 km (for Audi A6 2011)
— city
— highway
— combined
Engine lifespan, km ~260 000

The engine was installed on:

  • Audi A6 C7 (4G) in 2010 – 2012;
  • Audi A7 C7 (4G) in 2010 – 2012.

Disadvantages of the Audi CGWB engine

  • The main problem of all units of this series is increased oil consumption;
  • The reason for the oil burner is scuffing due to the ingress of catalyst crumbs into the cylinders;
  • Also, the chain is cracking here, since there are no check valves for the cylinder head oil channels;
  • Another culprit in the noise of the timing chains is the heavy wear of the hydraulic tensioners;
  • Other weak points of the engine: pump, injection pump, and muffler corrugations often burn out.

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