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Audi · Mid-Size · 2006–2011

Audi S6 C6

Weaknesses, engine ratings and buying advice

★★★★★
1.0 / 5.0 · Based on 1 engine variants

Body Variants

The Audi S6 C6 is available as Limousine and Avant — choose your body type for specific insurance data:

Limousine
1 Engines 1× Stay Away!
view Limousine →
Avant
1 Engines 1× Stay Away!
view Avant →

Generations

Engine Overview

The Audi S6 C6 is available with one engine variant at 435 hp.

S6 · Benziner· 435 PS
2006 2011
Stay Away! 11 weaknesses

The Audi S6 (Benziner, 435 PS) has the BUJ (5.2L V10 FSI) — rated: "Stay Away!", 11 known weaknesses.

Vehicle Weaknesses

WeaknessCost
✖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
Ad air springsupercharger Audi A6 C6 4FAAS supercharger A6 4Fair spring Audi S6 C6
 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
Ad control arm Audi S6 C6 4F frontcontrol arm A6 4F V10 complete
 High
NHTSA Owner Complaints
Above Average
3 complaints · 2006–2011
Airbags
2
Seat Belts
1

Top Reported Issues

⚠ Airbags (2 complaints)
⚠ Seat Belts (1 complaints)
Source: NHTSA (nhtsa.gov) · 2026-03

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Known Problems and Issues

A total of 16 weaknesses have been documented for the Audi S6 C6 (2006–2011) — 11 engine-related and 5 vehicle-related. One problem engine: BUJ (5.2L V10 FSI). Typical issues affect Suspension, Brakes, Electronics, Rust.

What to watch out for with the Audi S6? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

What problems and weaknesses does the Audi S6 C6 have? +
The Audi S6 C6 has 11 known engine weaknesses and 5 vehicle weaknesses.
What should I look for when buying a used Audi S6 C6? +
faq.watch_a_avoid
Which engine is recommended? +
None of the available engines are rated 'Good Choice'. Stay away! The most fun to drive is the BUJ (5.2L V10 FSI). Problem engine: BUJ (5.2L V10 FSI) — stay away!
Which Audi S6 C6 engine is the most fun? +
The {code} ({displacement}) offers the most driving fun in the Audi S6 C6 — rated: "Fun to Drive!". {description} Lamborghini V10 in an A6 body: sound from another planet, running costs to match. Above 5,000 rpm the S6 C6 sounds like an exotic sports car — the repair bills fit right in. For enthusiasts who rank sound above reason.
Is the Audi S6 C6 worth buying used? +
Caution is advised with the Audi S6 C6 — 1 of 1 engine variants are rated 'Stay Away!'. The engine choice is crucial.
What horsepower variants are available for the Audi S6 C6? +
The Audi S6 C6 is available with engine variants from 435 to 570 hp. Petrol: BUJ (5.2L V10 FSI).

Last updated: February 2026 · All information without guarantee