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.
Specifications
| 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 |
7.5 4.7 5.7 |
| 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.
