Audi RS6 C6
Weaknesses, engine ratings and buying advice
Body Variants
The Audi RS6 C6 is available as Sedan and Avant — choose your body type for specific insurance data:
Generations
Engine Overview
The Audi RS6 C6 is available with one engine variant at 579 hp.
The BSM is technically closely related to the Lamborghini V10 — the 5.0-litre V10 from the Gallardo was turbocharged to 580 PS for the RS6. Power delivery in everyday use feels broad and pushing, but the turbos dampen the high-revving character of the naturally aspirated unit. Ten cylinders in an estate produce a rumble no other family car offers. Thermally demanding: the turbos sit deep in the engine bay, intercoolers leak over time and then secondarily damage the turbos — the classic cascade. Oil pump seal wears early from engine heat. Every major job requires engine removal — diagnosis and repair become disproportionately expensive. Running costs are far beyond what the exterior suggests.
- !! Intake port carbon build-up from 80,000 km
The main problem of the 5.0 V10 BiTurbo: oil mist from the crankcase breather and EGR gases crack in the intake ports. Documented cases show power losses of over 60 hp.
Symptoms: Noticeable power loss, torque drop at higher rpm, rough running - !! Oil pump seal wears from engine heat from 80,000 km
The oil pump seal on the BSM wears under the extreme heat load in the engine bay. Oil seeps from the pump and collects under the engine. If ignored, oil starvation threatens bearing and turbocharger damage.
Symptoms: Oil patch under the vehicle in the oil pump area, falling oil level between services, oil smell in the engine bay at operating temperature. - !! Increased oil consumption from defective crankcase breather from 80,000 km
A defective crankcase breather and worn piston rings lead to increased oil consumption on the 5.0 V10 BiTurbo. Normal consumption up to 250 ml/1,000 km; above 300 ml indicates a technical fault.
Symptoms: Dropping oil level, possible light blue smoke on overrun, oil mist around the intake area
+ 3 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Air suspension compressor failure Vehicles with the optional air suspension (AAS) frequently suffer compressor failures that can cause the car to sink completely. Typical from 100,000 km. Symptoms: Car sinks on one side or completely, 'Suspension system fault' warning, compressor runs continuously from 100,000 km | High | |
| DRC suspension control valves rattle and leak The DRC hydraulic suspension on the RS6 C6 is highly problematic: control valves rattle audibly and dampers develop leaks. The 15 bar hydraulic system requires dealer-level special tooling for repairs. Symptoms: Rattling from the suspension especially over bumps, oil marks under the vehicle, unsettled handling from 70,000 km | High | |
| Control arms worn by high vehicle weight The vehicle weight of up to two tonnes leads to increased wear across the entire wheel suspension. Control arms are typically the first components that need replacing. Symptoms: Knocking over bumps, poor cornering behaviour, steering shimmy at higher speeds from 120,000 km | High | |
| Front control arms wear prematurely The high vehicle weight of the RS6 C6 causes above-average wear of front control arm bushings. Typical problem resulting from heavy weight combined with spirited driving. Symptoms: Knocking from the front axle, audible bushing wear, uneven tyre wear from 80,000 km | Medium |
Top Reported Issues
Alternatives
Chevrolet Malibu VII
Mid-Size (2008–2012)
Citroën C5 II
Mid-Size (2008–2017)
Honda Accord VIII
Mid-Size (2008–2012)
Opel Insignia A
Mid-Size (2008–2017)
Seat Exeo 3R
Mid-Size (2008–2013)
Skoda Superb 3T
Mid-Size (2008–2015)
Explore more
Known Problems and Issues +
A total of 17 weaknesses have been documented for the Audi RS6 C6 (2008–2010) — 6 engine-related and 11 vehicle-related. Typical issues affect Suspension, Brakes, Electronics, Rust.
What to watch out for with the Audi RS6? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the Audi RS6 C6 have? +
What should I look for when buying a used Audi RS6 C6? +
Which engine is recommended? +
Which Audi RS6 C6 engine is the most fun? +
Is the Audi RS6 C6 worth buying used? +
What horsepower variants are available for the Audi RS6 C6? +
Last updated: February 2026 · All information without guarantee