What the known faults on this Audi A6 typically cost to put right at a UK independent garage · use the figures to price risk before you bid, and to justify a reduction when something shows up on inspection.
The single priciest documented job on the 2014–2025 Audi A6 is timing chain, tensioner & guides at £900–£2,400. Few cars need every repair listed here · treat £2,590–£10,350 as the full exposure if one arrived with all of them.
Timing chain tensioner rattle on 3.0 TDI
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.
DPF and AdBlue faults on 2.0 and 3.0 TDI
Inspect · Check the AdBlue countdown and run to temperature
S tronic and multitronic judder and hesitation
Inspect · Test from cold in slow traffic
MMI, matrix headlight and sensor faults
Inspect · Test the lights, screens and all driver assistance
Air suspension on Avant models leaking and dropping
Inspect · Check overnight ride height on air-sprung cars
Fuel filler flap locking solenoid failure
Inspect · Lock and unlock the car using the key fob, then press the fuel filler flap. It should spring open freely. If it remains locked or requires excessive force, the actuator solenoid has failed.
Active engine mount failure causing cabin vibration
Inspect · Start the engine, apply the footbrake firmly, and shift the transmission into Drive. Feel for harsh, rhythmic vibrations transferring through the steering wheel and driver's seat, indicating collapsed active mounts.
Thermostat housing and water pump leaks on V6 engines
Inspect · Shine a torch down the front of the engine block, directly beneath the intake manifold. Look for pooled coolant or a crusty, pink residue indicating a slow leak from the housing.
Ranges are indicative parts-and-labour costs at a UK independent garage, inclusive of VAT. Franchised dealers typically sit 40–80% higher, and prestige or electrified variants sit at the top of each band. Always get a written quote before committing.
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.