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Audi A6 C6 common faults.

2004–2011. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Audi A6 C6

M 93 / Attribution

What to watch for

What can go wrong on this car?

The list covers the generation, the engines and the transmissions. Once you pick the version, only the faults that apply to it stay.

critical4

expensive4

Air suspension: compressor, air spring, ride height sensor

expensive

The four groups of parts in the air suspension (compressor, valve block, ride height sensors, air springs) work together, and any weak link causes a fault message, an uneven ride height or a car that settles.

It can affect every car in this generation.

Dual mass flywheel: diesel

expensive

The internal springs of the flywheel tire, and the two discs knock against each other.

Applies to the engine BLB, BRE, CAGB and 7 more.

FSI direct injection: intake valve coking

expensive

With direct injection the fuel does not wash the intake valves: the petrol goes into the cylinder, not behind the valve.

Applies to the engine BPJ, AUK, BDX and 4 more.

4 more faults belong to this generation. On the version page, only the ones that apply stay.

Official recall6 recallsShow

The manufacturer fixes these for free at a franchised dealer. Ask with the VIN whether it was done. The list covers the whole generation. We did not filter it by model year. Some apply only to a narrower production window.

Most recent: 23 April 2021

A12/01220/21Safety recallEnvironment23 April 2021 · EU Safety Gate

The vehicles are equipped with control software regarded as unauthorised by the competent authorities. The product does not comply with the requirements laid down in the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.

Remedy: Type of economic operator taking notified measure(s): Importer Category of measure(s): Recall of the product from end users Date of entry into force: 23/04/2021

The authority's notice

A12/00788/23Safety recallInjuriesno date · EU Safety Gate

The airbag may deteriorate over time and if deployed, excessive internal pressure may cause the inflator body to burst and metal fragments could pass through the cushion material causing injury to occupants. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

A12/00884/21Safety recallInjuriesno date · EU Safety Gate

The propellant used in the airbag inflator of the passenger airbags, manufactured by Takata, may experience a material alteration over time due to degradation occurring after prolonged exposure to high absolute humidity and high-temperature cycling. In the event of an airbag being deployed, the excessive internal pressure may cause the inflator body to rupture and metal fragments may pass through the cushion material causing injury to the occupants.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

A12/01891/20Safety recallInjuriesno date · EU Safety Gate

The Takata gas generator housing could burst when the passenger airbag is deployed. This may cause small metal parts to become detached from the housing, posing a risk of injury to the occupants.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

A12/0713/17Safety recallFireno date · EU Safety Gate

The additional coolant pump can block due to foreign particles in the cooling system. This can result in the pump overheating which could lead to a fire.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

A12/0942/18Safety recallFireno date · EU Safety Gate

The auxiliary coolant pump may seize up. This could lead to the pump overheating after the engine has been switched off with the risk that the vehicle could catch fire.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

Engines and transmissions in this generation

A fault is often tied to the engine, not to the whole generation. You find the engine code in the registration document.

C6 · 2004–2011

Pick the version.

The fault list opens on the version page.

208 versions

Showing 60 of 208 versions.

Neighbouring generations

C6 · 2004–2011

C6 (2004-2011). If the listing is from the changeover year, look at the neighbour too.

Previous generation

C5 · 1997–2004

This generation

C6 · 2004–2011

Next generation

C7 · 2011–2018

Common questions

About this generation

Which years does this page cover?

2004–2011. The changeover year can fall in two generations. If the listing is from that year, look at the neighbour too.

Does the fault apply to every car like this?

No. It depends on the engine and the transmission too.

Is it free?

The fault list is.

Information, not an expert opinion

We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms