Faulty electric auxiliary water pump
Often reportedSome A4 B8 V6 diesel models report issues with the auxiliary/electric water pump (secondary pump). Failures may trigger the check engine light or cause intermittent error messages.
Cooling
When buying a used Audi A4 2.7 TDI 2010 (B8), the most frequently mentioned issue is a faulty electric auxiliary water pump. Additionally, DPF clogging and frequent regenerations are also commonly reported.
Proceed with caution
Most reported issue: Faulty electric auxiliary water pump. Service history and a test drive matter.
Listed from most frequently reported, each with its source.
Some A4 B8 V6 diesel models report issues with the auxiliary/electric water pump (secondary pump). Failures may trigger the check engine light or cause intermittent error messages.
Cooling
The diesel particulate filter (DPF) on the V6 2.7 TDI tends to clog if the vehicle is used mainly in city or short trips, leading to more frequent regenerations and warning lights.
Exhaust Emissions
On the Audi A4 B8 2.7 TDI, the EGR valve can clog due to carbon deposits or operate abnormally, causing power loss, smoke, rough running, and the check engine light to come on.
Exhaust Emissions
On V6 TDI engines, issues with the high-pressure injection system (HP pump) and injectors can occur, leading to power loss, engine failure, rough running, and starting difficulties.
Fuel System
On some V6 TDI engines, intake manifold flaps or turbo variable geometry parts can stick due to carbon deposits or wear, causing torque loss, delayed response, and the check engine light to come on.
Turbo
Audi A4 2.7 TDI (2010): boot 490 L; fuel use 6,6 l/100 km (urban 8,1 l/100 km · extra-urban 5,7 l/100 km); 0–100 in 7.9 s.
Same trim, different year
We only publish claims we can verify. Cards come from Difetti fault records matched to this vehicle on brand, fuel, engine and generation.