Audi A3

The EA288 2.0 TDI CUNA is known for EGR cooler cracks that allow coolant into the exhaust tract. Overheating and engine damage are likely if repair is delayed.

Symptoms: Coolant loss without external leaks, whitish smoke, rising coolant temperature

EA288 engines up to September 2014 frequently had defective regulator slides in the water pump, leading to overheating (up to 130°C). A recall was issued.

Symptoms: Coolant temperature warning, engine reaching 130°C, warning light, emergency shutdown possible

The EA288 can also suffer high-pressure pump failures with metal debris in the fuel system. On complete failure all fuel-carrying components must be replaced.

Symptoms: Starting problems, severe power loss, engine failure, metallic fuel smell

The CUNA diesel particulate filter clogs with frequent city driving and short trips. The low-pressure EGR return system of the EA288 increases DPF loading. Cleaning required from around 250,000 km.

Symptoms: DPF warning light, power loss, limp mode, increased fuel consumption

Some CUNA engines show elevated oil consumption from cylinder bore issues and worn piston rings, especially in early production years. On the Evo variant the problem is more common: roughly 1 litre per 5,000 km.

Symptoms: Oil level drops noticeably between changes, occasional blue exhaust smoke under load

The 7-speed S tronic gearbox tends to judder and shudder at low speeds. The cause is clutch pack wear, rarely a faulty mechatronics unit. Oil change every 60,000 km is mandatory.

On quattro variants the Haldex Gen 5 pre-charge pump can fail. Without a functioning pump the rear axle transfers no power. Regular Haldex coupling oil changes prevent damage.

The hydraulic pump can no longer build sufficient pressure or loses oil through leaking lines. The oil level drops from MAX to MIN within a few cycles.

The welded-in glass rear window separates from the fabric hood after years, starting at the lower corners. The rubber layer in the three-ply roof fabric deteriorates.