ExhaustHigh
DPF and AdBlue faults on 2.0 and 3.0 TDI
- Typically appears
- 80,000+ miles
- What to inspect
- Check the AdBlue countdown and run to temperature
- Typical repair
- DPF forced regen or replacement · £250–£1,600
Is the 2014–2025 Audi A6 reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
3.7/ 10
Buy with cautionOn our documented-fault scoring the Audi A6 rates 3.7 out of 10 · buy with caution. We hold 8 known faults for it and 4 are rated high severity, so the risk is real but contained. The weak points cluster around exhaust, suspension and transmission. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.
Verdict · Walk unless the history is spotless
What the score is built from
- Critical
- 0
- High
- 4
- Medium
- 3
- Low
- 1
Weak points cluster around exhaust, suspension, transmission, electrical.
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Check this carThe faults that decide it
SuspensionHigh
Air suspension on Avant models leaking and dropping
- Typically appears
- 80,000+ miles
- What to inspect
- Check overnight ride height on air-sprung cars
- Typical repair
- Suspension refresh (per axle) · £250–£1,100
TransmissionHigh
S tronic and multitronic judder and hesitation
- Typically appears
- 80,000+ miles
- What to inspect
- Test from cold in slow traffic
- Typical repair
- Significant repair · £400–£1,400
EngineHigh
Timing chain tensioner rattle on 3.0 TDI
- Typically appears
- 70,000-100,000 miles
- What to inspect
- Perform a completely cold start with the bonnet open. Listen closely to the rear of the engine block for a distinct metallic rattling sound lasting 3 to 5 seconds before oil pressure builds.
- Typical repair
- Timing chain, tensioner & guides · £900–£2,400
ElectricalMedium
MMI, matrix headlight and sensor faults
- Typically appears
- Age-related
- What to inspect
- Test the lights, screens and all driver assistance
- Typical repair
- Infotainment repair or software fix · £120–£1,200
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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