The EGR cooler cools the recirculated exhaust gas before it enters the intake again, and coolant flows through it while it does so.
Applies to the engine CMGB, CNHA.
Repair: 600–1,500 EUR
2011–2018. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

M 93 / CC BY-SA 3.0 de
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 EGR cooler cools the recirculated exhaust gas before it enters the intake again, and coolant flows through it while it does so.
Applies to the engine CMGB, CNHA.
Repair: 600–1,500 EUR
The balance shaft module drives the oil pump through a hexagonal shaft stub.
Applies to the engine CGLC.
The common rail high-pressure pump is lubricated and cooled by the diesel itself, because the pump produces over 2,000 bar and has no separate lubrication circuit.
Applies to the engine CDUC.
Repair: 1,500–15,000 EUR
On these engines the oil pump is driven by its own small toothed belt, and that belt runs in the hot engine oil.
Applies to the engine CNHA, CMGB.
Repair: 200–600 EUR
The timing chain of the longitudinal V6 diesel runs at the back of the engine, on the gearbox side, so replacing it means taking out the engine or the gearbox.
Applies to the engine CDUC, CDUD, CGQB and 9 more.
The continuously variable gearbox of the longitudinal engine Audis (Multitronic) is vulnerable from both the control unit and the drive chain side.
Applies to the transmission 0AW.
On short urban trips the particulate filter cannot burn through.
Applies to the engine CSUD.
The EA888 engines built between 2008 and 2011 got a 1.5 mm oil scraper ring instead of a 2 mm one, and the 0.3 mm drain holes in that ring soot up and then block.
Applies to the engine CDNB.
Repair: 2,000–5,000 EUR
13 more faults belong to this generation. On the version page, only the ones that apply stay.
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.
A12/00615/21Safety recallInjuriesno date · EU Safety GateDue manufacturing defect in the instrument panel, the deployment of the airbag could be impeded. This could impair its protective potential and could lead to plastic parts become detached when the airbag is activated, increasing the risk of injury in the event of an accident.
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
A12/00689/20Safety recallFireno date · EU Safety GateMoisture can penetrate into the belt starter generator. This can result in a short circuit, leading to local overheating and increased risk of fire. Due to the permanent power supply of the starter generator, this can occur when the vehicle has already been parked for a while.
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
A12/00752/21Safety recallInjuriesno date · EU Safety GateThe vehicles may be fitted with a towbar with a swivel mechanism that may have a defective locking pin. As a result, the pin could break while driving, increasing the risk of an accident.
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
A12/00788/23Safety 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
A12/01401/20Safety recallFireno date · EU Safety GateMoisture can ingress into the belt starter generator, generating short-circuits. This can lead to local overheating of the component, increasing risk of 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
A12/01891/20Safety recallInjuriesno date · EU Safety GateThe 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
A12/0217/19Safety recallFireno date · EU Safety GateThe electrical connector for the auxiliary heating element may not have been fully secured during the assembly process. This could lead to increased contact resistances in the connector area. In such cases, thermal overload could arise, which can 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
A12/0264/19Safety recallInjuriesno date · EU Safety GateDue to contamination during its manufacture, the bonding of the components of the sunroof may be affected. Consequently there could be leaks in the sunroof or the rear glass panel could even detach.
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
A12/0333/17Safety recallInjuriesno date · EU Safety GateDifferences in the mixture ratio for the initiating devices for the airbags or seat-belt pre-tensioners could lead to the airbags or seat-belt pre-tensioners not activating in the event of an accident.
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
A12/0382/19Safety recallFireno date · EU Safety GateIn certain vehicles, fuel can leak onto the engine fuel rail. Fuel leakage close to a source of ignition may increase the risk of the vehicle catching 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
A12/0713/17Safety recallFireno date · EU Safety GateThe 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
A12/0862/19Safety recallInjuriesno date · EU Safety GateThe locking mechanism in the articulated trailer hitch may be defective. Consequently, the trailer hitch might not be correctly locked and could swing out, causing the trailer to drop while the vehicle is in motion.
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
A12/0942/18Safety recallFireno date · EU Safety GateThe 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
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.
322 versions
1.8 l · 1798 cm³
CYGA · ML322
1.8 TFSI
2014–2018
1.8 l · 1798 cm³
CYGA · ML322
1.8 TFSI
2014–2018
1.8 l · 1798 cm³
CYGA · ML322
1.8 TFSI Business Edition
2014–2018 · Business Edition
1.8 l · 1798 cm³
CYGA · ML322
1.8 TFSI Business Edition
2014–2018 · Business Edition
1.8 l · 1798 cm³
CYGA · ML322
1.8 TFSI Premium Edition
2014–2018 · Premium Edition
1.8 l · 1798 cm³
CYGA · ML322
1.8 TFSI Premium Edition
2014–2018 · Premium Edition
1.8 l · 1798 cm³
CYGA · ML322
1.8 TFSI Sport Edition
2014–2018 · Sport Edition
1.8 l · 1798 cm³
CYGA · ML322
1.8 TFSI Sport Edition
2014–2018 · Sport Edition
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra
2014–2018 · ultra
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra
2014–2018 · ultra
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra Business Edition
2014–2018 · ultra Business Edition
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra Business Edition
2014–2018 · ultra Business Edition
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra Lease Edition
2014–2018 · ultra Lease Edition
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra Lease Edition
2014–2018 · ultra Lease Edition
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra Premium Edition
2014–2018 · ultra Premium Edition
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra Premium Edition
2014–2018 · ultra Premium Edition
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra Sport Edition
2014–2018 · ultra Sport Edition
1.8 l · 1798 cm³
CYGA · DL382
1.8 TFSI ultra Sport Edition
2014–2018 · ultra Sport Edition
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp
2011–2014
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp
2011–2014
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp
2011–2014
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp
2011–2014
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Business Edition
2011–2014 · Business Edition
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Business Edition
2011–2014 · Business Edition
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Business Edition
2011–2014 · Business Edition
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Business Edition
2011–2014 · Business Edition
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Pro Line
2011–2014 · Pro Line
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Pro Line
2011–2014 · Pro Line
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Pro Line
2011–2014 · Pro Line
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Pro Line
2011–2014 · Pro Line
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Pro Line +
2011–2014 · Pro Line +
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Pro Line +
2011–2014 · Pro Line +
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Pro Line +
2011–2014 · Pro Line +
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Pro Line +
2011–2014 · Pro Line +
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Pro Line S
2011–2014 · Pro Line S
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Pro Line S
2011–2014 · Pro Line S
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Pro Line S
2011–2014 · Pro Line S
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Pro Line S
2011–2014 · Pro Line S
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Sport Edition
2011–2014 · Sport Edition
2.0 l · 1968 cm³
CGLE · CSUE · 0AW
2.0 TDI 136hp Sport Edition
2011–2014 · Sport Edition
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Sport Edition
2011–2014 · Sport Edition
2.0 l · 1968 cm³
CGLE · CSUE · ML322
2.0 TDI 136hp Sport Edition
2011–2014 · Sport Edition
2.0 l · 1968 cm³
CSUD · ML322
2.0 TDI ultra 150hp
2014–2018 · ultra 150hp
2.0 l · 1968 cm³
CSUD · ML322
2.0 TDI ultra 150hp
2014–2018 · ultra 150hp
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp
2014–2018 · ultra 150hp
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp
2014–2018 · ultra 150hp
2.0 l · 1968 cm³
CSUD · ML322
2.0 TDI ultra 150hp Business Edition
2014–2018 · ultra 150hp Business Edition
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp Business Edition
2014–2018 · ultra 150hp Business Edition
2.0 l · 1968 cm³
CSUD · ML322
2.0 TDI ultra 150hp Business Edition
2014–2018 · ultra 150hp Business Edition
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp Business Edition
2014–2018 · ultra 150hp Business Edition
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp Lease Edition
2014–2018 · ultra 150hp Lease Edition
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp Lease Edition
2014–2018 · ultra 150hp Lease Edition
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp Premium Edition
2014–2018 · ultra 150hp Premium Edition
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp Premium Edition
2014–2018 · ultra 150hp Premium Edition
2.0 l · 1968 cm³
CSUD · ML322
2.0 TDI ultra 150hp Premium Edition
2014–2018 · ultra 150hp Premium Edition
2.0 l · 1968 cm³
CSUD · ML322
2.0 TDI ultra 150hp Premium Edition
2014–2018 · ultra 150hp Premium Edition
2.0 l · 1968 cm³
CSUD · ML322
2.0 TDI ultra 150hp Sport Edition
2014–2018 · ultra 150hp Sport Edition
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp Sport Edition
2014–2018 · ultra 150hp Sport Edition
2.0 l · 1968 cm³
CSUD · ML322
2.0 TDI ultra 150hp Sport Edition
2014–2018 · ultra 150hp Sport Edition
2.0 l · 1968 cm³
CSUD · DL382
2.0 TDI ultra 150hp Sport Edition
2014–2018 · ultra 150hp Sport Edition
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.