Audi A4/A5/A6/Q5 B8 2.0tdi CAG engine
R28,500.00
The Audi CAG (typically referring to the CAGA variant) is a 2.0-litre Turbocharged Direct Injection (TDI) diesel engine. Part of the EA189 family, it was a pivotal engine for Audi as it marked the transition to Common Rail (CR) technology, offering significantly smoother and quieter operation compared to the older “Pumpe Düse” (PD) units.
Key Specifications
The CAG engine family exists in several power outputs (CAGA, CAGB, CAGC) typically found in the Audi A4 (B8).
| Feature | Specification |
|---|---|
| Displacement | 1,968 cc (2.0L) |
| Configuration | Inline 4-cylinder, DOHC, 16-Valve |
| Power Output (CAGA) | 143 PS (105 kW / 141 hp) @ 4,200 rpm |
| Max Torque (CAGA) | 320 Nm (236 lb-ft) @ 1,750–2,500 rpm |
| Fuel System | Common Rail direct injection |
| Aspiration | Turbocharger with Intercooler |
| Emission Standard | Euro 4 or Euro 5 (depending on variant) |
Vehicle Applications
The CAG series was primarily used in Audi’s longitudinal engine platforms between 2007 and 2012.
- Audi A4 (B8): The most common application, where it served as the high-volume diesel choice.
- Audi A5 (8T): Used in early Sportback and Coupe models.
- Audi Q5 (8R): Found in entry-level 2.0 TDI variants.
- Seat Exeo: Rebranded A4 (B7/B8) using the 2.0 TDI CR engine.
Common Variants
- CAGA: The standard 143 PS version.
- CAGB: A mid-range version with 136 PS (100 kW).
- CAGC: An entry-level “economy” version with 120 PS (88 kW).
Reliability and Known Issues
While generally robust and capable of high mileage (often exceeding 300,000 km), the CAG engine has specific maintenance focus areas.
- Oil Pump Hex Drive: Earlier EA189 units have a 6mm hexagonal shaft driving the oil pump that can round off, leading to sudden loss of oil pressure and engine failure.
- DPF & EGR Clogging: Frequent short city trips can lead to Diesel Particulate Filter (DPF) blockage or Exhaust Gas Recirculation (EGR) valve failure.
- HPFP Failure: The high-pressure fuel pump can occasionally fail and send metal shavings through the fuel system, requiring a costly overhaul.
- Dieselgate: As an EA189 engine, it was subject to global recalls regarding emissions software updates.