Explore common problems, estimated repair costs and practical checks for the 2012–2018 Audi A6 3.0 Diesel Automatic C7. Use this guide to help assess a used car, then unlock a personalised report for the exact vehicle you're considering.
Rattle for a second or two on cold start, rougher startup, or an engine warning light if wear gets worse.
Start the engine from fully cold and listen from outside with the bonnet open.
£3,200
Engine warning light, reduced power, rough running, smoky running, or repeated emissions faults.
Drive from low revs in a higher gear and then accelerate steadily once the engine is warm.
£1,200
Emissions warning, AdBlue system fault message, countdown to no restart, or engine light with otherwise normal driving.
Read the stored emissions faults. Test the NOx sensors and SCR dosing system.
£900
It can be, but only if the individual car backs it up. For the 2012–2018 Audi A6 3.0 Diesel Automatic C7, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.
The problem cards above list the model-level checks for this guide. Read them as priorities for inspection and paperwork review, not proof that every example will have those faults.
Look for evidence, not just assurances: MOT advisories, service history, repair invoices, warning lights, fluid leaks, tyre and brake condition, and how the car behaves on a proper test drive. And of course, look at your personalised Should I Buy This Car? report, outlining a full list of common issues in detail, a personalised road test, a plain-English explanation and a MotorIQ score.
The guide above gives you the model-level pattern. A personalised MotorIQ report checks the registration-specific record and turns it into an ownership view before you commit.
Or enter the vehicle manually