2011–2017 Audi A6 Mk4 (C7)
Browse our directory of 2011–2017 Audi A6 Mk4 (C7) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
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Common Problems & Reliability
The 2011–2017 Audi A6 Mk4 (C7) has 5 known issues. 2 of these are classified as serious faults that could be expensive to repair. 3 are moderate concerns worth inspecting before purchase.
3.0 TDI Timing Chain Rattle
SeriousThe V6 TDI timing chains sit at the rear of the engine and the hydraulic tensioners can weaken, causing cold-start rattle and potential chain jump if ignored.
Symptoms: Loud metallic rattle on cold start, Timing fault codes...
Est. repair cost: £1,500–£3,000
Adaptive Air Suspension Leak
SeriousCars with optional adaptive air suspension develop leaks in the air struts, causing the car to sag and the compressor to overwork and fail.
Symptoms: Car sitting low after parking, Compressor running for too long...
Est. repair cost: £700–£2,000
Coolant Leak in Engine "V"
ModerateThe coolant shut-off valve fails, filling the engine valley with coolant.
Symptoms: Loss of coolant, Sweet smell from engine bay
Est. repair cost: £400–£900
DPF Clogging and Regeneration Issues
ModerateTown-driven 3.0 TDI models block their DPFs, causing warning lights, limp mode and expensive DPF cleaning or replacement.
Symptoms: DPF warning light, Limp mode...
Est. repair cost: £250–£1,200
Electrical Module and Sensor Faults
ModerateVarious electrical issues including MMI glitches, parking sensor failures, steering lock module faults and battery drain from comfort module issues.
Symptoms: MMI freezes, Parking sensor failures...
Est. repair cost: £0–£600
Buying Tips for the 2011–2017 Audi A6 Mk4 (C7)
- ✓Check for coolant leaks in the "V" of 3.0 TDI engines
- ✓S tronic (DSG) models need fluid changes every 38k miles
- ✓Listen for humming from the front wheels (wheel bearings)
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