The crankcase breather module keeps the pressure inside the engine at the right level with a membrane.
Applies to the engine CEUC.
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.

OWS Photography / CC BY 4.0
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 CEUC.
Repair: 400–1,800 EUR
The 7 speed wet clutch S tronic used in the longitudinal engine Audis (0B5 / DL501) is more durable than the early DSG units, but the mechatronics unit is the most common source of faults here too.
Applies to the transmission DL501.
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: 22 June 2018
18V427000AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULEAIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE22 June 2018 · NHTSA (USA)Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2005-2008 Audi A4 Sedan, A4 Avant, S4 Avant and S4 Sedan, 2007-2008 RS4 Sedan, 2004 RS4 Cabriolet, 2007-2009 A4 Cabriolet and S4 Cabriolet, 2005-2011 A6 Sedan, 2006-2011 A6 Avant, and 2007-2011 S6 Sedan vehicles. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Risk: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
Remedy: Audi has notified owners, and dealers will replace the passenger frontal air bag with an alternate remedy part, free of charge. The recall began June 29, 2018. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 69R7. Note: This recall supersedes recalls 16V382, 17V032 and 18V004 and includes vehicles that may have had their air bag previously replaced under one of those campaigns.
18V004000AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULEAIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE4 January 2018 · NHTSA (USA)Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2010-2011 Audi A6 Avant, A6 Sedan and S6 Sedan vehicles, ever registered in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia, or "Zone B." Additionally, unless included in "Zone B" above, Volkswagen is recalling certain 2009 Audi A4 Cabriolet and S4 Cabriolet vehicles, and 2009-2011 Audi A6 Avant, A6 Sedan and S6 Sedan vehicles registered in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming or "Zone C." These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Risk: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
Remedy: Audi will notify owners, and dealers will replace the passenger frontal air bag inflator, free of charge. Audi mailed an interim owner notification March 02, 2018. When parts to perform the recall repair become available, Audi will notify owners, and dealers will replace the passenger frontal air bag inflator, free of charge. The recall is expected to begin in June 2018. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 69U1. Note: This recall has been superseded by 18V427.
16V382000AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULEAIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE1 June 2016 · NHTSA (USA)Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2004-2008 Audi A4, and 2005-2011 Audi A6 vehicles originally sold, or ever registered, in Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands, or "Zone A." Additionally, unless included in "Zone A" above, Volkswagen is recalling certain model year 2004-2008 Audi A4, and 2005-2008 Audi A6 vehicles originally sold, or ever registered, in Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia, or "Zone B." Lastly, unless included in "Zone A" or "Zone B" above, Volkswagen is recalling model year 2004 Audi A4 vehicles originally sold, or registered, in Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the front air bags, these inflators may rupture due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Risk: An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
Remedy: Audi will notify owners, and dealers will replace the passenger frontal air bag inflator, free of charge. Owner notification letters were mailed April 28, 2017. Owners may contact Audi customer service at 1-800-822-2834.
11V580000AIR BAGS:SIDE/WINDOWAIR BAGS:SIDE/WINDOW6 December 2011 · NHTSA (USA)VOLKSWAGEN IS RECALLING CERTAIN MODEL 2012 AUDI A6 VEHICLES MANUFACTURED FROM APRIL 8, 2011, THROUGH MAY 26, 2011. DUE TO A PROBLEM IN THE STITCHING PROCESS OF THE CURTAIN AIR BAG, THE SEAM OF THE AIR BAG MAY NOT BE STITCHED PROPERLY.
Risk: IN THE EVENT OF A CRASH, THE HEAD CURTAIN AIR BAG MAY NOT DEPLOY AND WILL NOT BE ABLE TO PROPERLY PROTECT AN OCCUPANT, INCREASING THE RISK OF AN INJURY.
Remedy: VOLKSWAGEN WILL NOTIFY ALL OWNERS AND DEALERS WILL REPLACE THE LEFT AND/OR RIGHT CURTAIN AIR BAG FREE OF CHARGE. THE SAFETY RECALL IS EXPECTED TO BEGIN DURING JANUARY 2012. OWNERS MAY CONTACT VOLKSWAGEN AT 1-800-822-8987.
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
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.
8 versions
4.0 l · 3993 cm³
CEUC · DL501
4.0 TFSI quattro Pro Line
2012–2014 · quattro Pro Line
4.0 l · 3993 cm³
CEUC · DL501
4.0 TFSI quattro Pro Line
2012–2014 · quattro Pro Line
4.0 l · 3993 cm³
CEUC · DL501
4.0 TFSI quattro Pro Line +
2012–2014 · quattro Pro Line +
4.0 l · 3993 cm³
CEUC · DL501
4.0 TFSI quattro Pro Line +
2012–2014 · quattro Pro Line +
4.0 l · 3993 cm³
CTGE · DL501
4.0 TFSI quattro
2014–2018 · quattro
4.0 l · 3993 cm³
CTGE · DL501
4.0 TFSI quattro
2014–2018 · quattro
4.0 l · 3993 cm³
CTGE · DL501
4.0 TFSI quattro Pro Line +
2014–2018 · quattro Pro Line +
4.0 l · 3993 cm³
CTGE · DL501
4.0 TFSI quattro Pro Line +
2014–2018 · 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.