The crankcase breather module keeps the pressure inside the engine at the right level with a membrane.
Applies to the engine CRDB.
Repair: 400–1,800 EUR
2011–2018. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Rutger van der Maar / CC BY 2.0
What to watch for
The list covers the generation, the engines and the transmissions. Once you pick the version, only the faults that apply to it stay.
The crankcase breather module keeps the pressure inside the engine at the right level with a membrane.
Applies to the engine CRDB.
Repair: 400–1,800 EUR
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.
A12/00788/23Safety recallInjuriesno date · EU Safety GateThe 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
A12/00884/21Safety recallInjuriesno date · EU Safety GateThe 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
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.
C7 · 2011–2018
The fault list opens on the version page.
4 versions
4.0 l · 3993 cm³
CRDB · AL551
4.0 TFSI quattro
2013–2014 · quattro
4.0 l · 3993 cm³
CRDB · AL551
4.0 TFSI quattro Pro Line +
2013–2014 · quattro Pro Line +
4.0 l · 3993 cm³
CWUC
4.0 TFSI Performance quattro
2015–2018 · Performance quattro
4.0 l · 3993 cm³
CWUC
4.0 TFSI Performance quattro Pro Line +
2015–2018 · Performance quattro Pro Line +
Neighbouring generations
C7 (2011-2018). If the listing is from the changeover year, look at the neighbour too.
Common questions
2011–2018. The changeover year can fall in two generations. If the listing is from that year, look at the neighbour too.
No. It depends on the engine and the transmission too.
The fault list is.
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.