From 2008 to 2013, the German company produced the 2.0-liter Audi CAHA 2.0 TDI engine, which was fitted to several of its well-known models, including the A4 B8, A5 8T, A6 C6, and Q5 8R crossover. In essence, this diesel engine is an improved version of the well-known 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
Here, unpredictable piezo injectors rapidly malfunction due to poor fuel;
Diesel vehicles manufactured prior to 2009 had an oil pump hex issue;
Oil is frequently forced out of the engine through the plastic valve cover;
The timing belt serves 180,000 km, and when it breaks, the valves bend in accordance with factory regulations. Particulate filters and EGR valves cause a lot of issues on large runs.