Audi A6
V6 diesel with 200 kW in the BiTDI variant after facelift. Highest output of the 3.0 TDI. Powerful drivetrain with electrically driven compressor.
Refined multi-cylinder — relaxed cruising
272 hp 3.0L with a pleasant, refined character. Relaxed long-distance cruiser without sporting ambitions. Factor in the known weak points.
Engine Weaknesses 5
Material defect on camshafts of EA897 engines (272 hp and 218 hp) built 2014 to early 2017. A broken camshaft causes total engine failure. Audi performed goodwill repairs where service history was complete.
Symptoms: Loud ticking or knocking from the engine bay clearly exceeding diesel combustion noise; often occurs on cold start or under load
The 3.0 TDI V6 uses four timing chains. From around 160,000 km cold-start rattling occurs. Timing chain replacement requires extensive engine removal and costs €1,500–4,500.
Symptoms: Cold-start rattle that disappears as the engine warms up; engine check light; rough running
The variable oil pump in the EA897evo reduces oil pressure at low rpm for Euro 6 optimisation. With fuel-diluted oil viscosity drops, which can lead to seizure damage.
Symptoms: Rising oil level (fuel in oil), oil pump clatter, abrupt engine damage possible without warning
Short trips prevent complete DPF regeneration. The filter clogs and the engine automatically reduces power. Frequent active regeneration promotes fuel ingress into the oil.
Symptoms: Power loss and increased fuel consumption, DPF warning light, oil level rises from fuel ingress
On the CRTE the coolant control valve and oil cooler can become leaky and cause gradual coolant loss. Left untreated, overheating damage is likely. The intake manifold can become contaminated with oil mist.
Symptoms: Dropping coolant level without visible leak, coolant smell in engine bay, temperature rising under high load
Vehicle Weaknesses 9
On model years 2015–2018, the locking bolt of the tow bar can fracture, potentially causing the trailer to become detached while driving. Free workshop visit required.
The Multitronic CVT gearbox has a notoriously poor reliability record. Improved on the C7, it remains a risk. Total failure possible from 100,000 km; repair is very costly.
A material defect can cause the camshafts in the 3.0 TDI to fracture, leading to engine damage. Mainly affects vehicles from model year 2014 to early 2017.
The optional air suspension (AAS) is prone to failure through porous air bellows and defective compressors. Repair costs of 600–1,800 EUR per corner are possible.
LED headlights fail due to defective control modules or individual LEDs. Repair is often more expensive than replacement, as modules cannot be replaced individually.
The automatic climate control shows malfunctions from around 60,000 km: incorrect temperature regulation, blower stage issues or complete failure of individual zones on the three-zone system.
Wheel bearings, particularly at the rear axle, show increased wear at higher mileages. Regularly flagged on vehicles from 80,000 km.
On the C7, rust occurs primarily on the underbody and sills, sometimes in hard-to-reach areas. On vehicles over 7 years old, the underbody should be thoroughly inspected.
On V6 and V8 engines, engine mounts often wear from around 50,000 km, causing noticeable vibrations.