A6 C8
1 generation · Select a generation to see engines
Which Audi A6 C8 engine is the most reliable? See common problems, reviews and reliability verdicts across generations and engines.
Frequently asked questions
Which Audi A6 C8 engine is the most reliable?
40 / 45 TFSI (2.0 EA888 / 3.0 EA839) — Maint. Sensitive verdict. The petrols span the 2.0 TFSI (40/45 TFSI, EA888 Gen3 with 48V mild-hybrid — shared with the A4/A5/Q5) and the smooth 3.0 V6 TFSI (55 TFSI, EA839). The 2.0 EA888 Gen3 is robust (chain-driven, the Gen2 oil-burn long resolved) with the usual modern cautions — chain-tensioner, PCV, DI carbon — plus the 48V mild-hybrid system; the V6 adds its own complexity and cost. Both pair with the S tronic/tiptronic and quattro. A documented car with a healthy chain is dependable and refined. Buy on oil, chain and (48V/gearbox) service history.
Which Audi A6 C8 engines should you avoid?
None of the Audi A6 C8 engines listed are rated "Problematic" or "Avoid" — but always check the service history before buying.
What are the most common Audi A6 C8 problems?
The most commonly reported problems across all Audi A6 C8 generations and engines: Chain tensioner / PCV / carbon, 48V mild-hybrid / S tronic, DPF / EGR / twin AdBlue, Injector / V6 complexity.