Engine Audi CAHA

The 2.0-liter Audi CAHA 2.0 TDI engine was produced by the German concern from 2008 to 2013 and was installed on many of its popular models, such as the A4 B8, A5 8T, A6 C6 and the Q5 8R crossover. This diesel engine is essentially a more efficient version of the famous CAGA engine.

The EA189 series also includes: CAYC, CAAC, CAGA, CAHA, CBAB, CFCA, CFGB, CLCA, CLJA, CKTB, CFHC, CKUB.


Production years 2008-2013
Displacement, cc 1968
Fuel system Common Rail
Power output, hp 170
Torque output, Nm 350
Cylinder block cast iron R4
Block head aluminum 16v
Cylinder bore, mm 81
Piston stroke, mm 95.5
Compression ratio 16.5
Features DOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging VGT
Recommended engine oil 5W-30
Engine oil capacity, liter 4.6
Fuel type diesel
Euro standards EURO 4/5
Fuel consumption, L/100 km (for Audi A6 2009)
— city
— highway
— combined
Engine lifespan, km ~330 000
Weight, kg 165

The engine was installed on:

  • Audi A4 B8 (8K) in 2008 – 2011;
  • Audi A5 1 (8T) in 2008 – 2011;
  • Audi A6 C6 (4F) in 2008 – 2011;
  • Audi Q5 1 (8R) in 2008 – 2012;
  • Seat Exeo 1 (3R) in 2009 – 2013.

Disadvantages of the Audi CAHA engine

  • From low-quality fuel, capricious piezo injectors quickly fail here;
  • Diesels before 2009 suffered from a problem with the hex of the oil pump;
  • Even in the engine quite often presses oil from under the plastic valve cover;
  • According to the factory regulations, the timing belt serves 180,000 km, when it breaks, the valves bend;
  • On significant runs, a lot of problems are caused by a particulate filter and an EGR valve.

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