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 DFBA.
Repair: 600–1,500 EUR
2018–2025. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Alexander Migl / CC BY-SA 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 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 DFBA.
Repair: 600–1,500 EUR
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 DDVE.
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 DFBA.
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 DDVB, DDVE, DEWA.
On short urban trips the particulate filter cannot burn through.
Applies to the engine DFBA.
The most common source of faults on the longitudinal 7 speed S tronic that replaced the DL501 (0CJ / 0CK / 0CL) is the mechatronics unit as well.
Applies to the transmission DL382.
On AdBlue (SCR) diesels the NOx sensor after the catalyst ages, and the tip of the dosing valve crystallises.
Applies to the engine DFBA.
The tension of the piston rings is too low, so oil gets into the combustion chamber.
Applies to the engine DLBA.
7 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.
Most recent: 23 April 2021
A12/01220/21Safety recallEnvironment23 April 2021 · EU Safety GateThe 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
A12/00504/22Safety recallInjuriesno date · EU Safety GateAlteration of the rear axle’s toe and/or camber values lead to increased and uneven wear on the rear tyres, and if worn down to its carcass may suffer a sudden loss of pressure. This can lead to loss of traction and may affect vehicle handling, increasing the risk of an accident. 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
A12/00615/21Safety 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
A12/01401/20Safety 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
A12/02640/23Safety recallInjuriesno date · EU Safety GateThe front left side airbag is not properly fixed and the seat may cause the area covered by the airbag to move slightly. As a result, the protective effect of the airbag is reduced, increasing the risk of injury in case of an accident. 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
A12/0382/19Safety 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
A12/0862/19Safety 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
INFO/00089/21Safety recallInjuriesno date · EU Safety GateFaulty crash sensors for the airbag restraint systems may have been installed in both the front doors. This could impair the protective effect of the side airbags, head airbags and/or belt tensioners, 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
INFO/00138/21Safety recallInjuriesno date · EU Safety GateThe nuts on the eccentric bolt of the rear-axle spring-link control arm may break due to stress corrosion. As a result, the rear axle could move in the wrong direction, in an uncontrollable manner at high speeds.
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
SR/00268/25Safety recallFireno date · EU Safety GateDuring the charging process, the high/voltage battery may overheat due to a defect in the battery modules. This can result in a fire and cause injuries to occupants and bystanders. 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
SR/00999/25Safety recallInjuriesno date · EU Safety GateThe vehicles may have been fitted with a damaged module of the passengers airbag, which may impair the restraining effect of the airbag in the event of an accident, posing a risk of injury. 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
SR/03985/25Safety recallFireno date · EU Safety GateThe high-voltage battery’s cell modules could overheat during charging. This may lead to fire. 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
SR/04382/25Safety recallInjuriesno date · EU Safety GateThe product has a defect in the buckle and the anchorage of the seat belt, which may result in insufficient restraining effect of the seatbelt, increasing the risk of injuries, in particular to the passengers of the front seats. 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
C8 · 2018–2025
The fault list opens on the version page.
34 versions
2.0 l · 1968 cm³
DFBA
40 TDI Pro Line
2018–2023 · 40 TDI Pro Line
2.0 l · 1968 cm³
DFBA
40 TDI Pro Line Advanced
2018–2023 · 40 TDI Pro Line Advanced
2.0 l · 1968 cm³
DFBA
40 TDI Pro Line S
2018–2023 · 40 TDI Pro Line S
2.0 l · 1968 cm³
DFBA
40 TDI quattro Pro Line
2018–2023 · 40 TDI quattro Pro Line
2.0 l · 1968 cm³
DFBA
40 TDI quattro Pro Line Plus
2018–2023 · 40 TDI quattro Pro Line Plus
2.0 l · 1968 cm³
DFBA
40 TDI quattro Pro Line S
2018–2023 · 40 TDI quattro Pro Line S
2.0 l · 1984 cm³
no engine code
40 TFSI Pro Line
2018–2023 · 40 TFSI Pro Line
2.0 l · 1984 cm³
no engine code
40 TFSI Pro Line Advanced
2018–2023 · 40 TFSI Pro Line Advanced
2.0 l · 1984 cm³
no engine code
40 TFSI Pro Line S
2018–2023 · 40 TFSI Pro Line S
2.0 l · 1984 cm³
DLBA · DL382
45 TFSI Pro Line
2018–2023 · 45 TFSI Pro Line
2.0 l · 1984 cm³
DLBA · DL382
45 TFSI Pro Line Plus
2018–2023 · 45 TFSI Pro Line Plus
2.0 l · 1984 cm³
DLBA · DL382
45 TFSI Pro Line S
2018–2023 · 45 TFSI Pro Line S
2.0 l · 1984 cm³
DLBA · DL382
45 TFSI quattro Pro Line
2018–2023 · 45 TFSI quattro Pro Line
2.0 l · 1984 cm³
DLBA · DL382
45 TFSI quattro Pro Line Plus
2018–2023 · 45 TFSI quattro Pro Line Plus
2.0 l · 1984 cm³
DLBA · DL382
45 TFSI quattro Pro Line S
2018–2023 · 45 TFSI quattro Pro Line S
2.0 l · 1984 cm³
no engine code
50 TFSI e quattro Pro Line
2018–2023 · 50 TFSI e quattro Pro Line
2.0 l · 1984 cm³
no engine code
50 TFSI e quattro Pro Line Plus
2018–2023 · 50 TFSI e quattro Pro Line Plus
2.0 l · 1984 cm³
no engine code
50 TFSI e quattro Pro Line S
2018–2023 · 50 TFSI e quattro Pro Line S
2.0 l · 1984 cm³
no engine code
55 TFSI e quattro Competition
2018–2023 · 55 TFSI e quattro Competition
2.0 l · 1984 cm³
no engine code
45 TFSI Pro Line
2018–2023 · 45 TFSI Pro Line
2.0 l · 1984 cm³
no engine code
45 TFSI Pro Line Advanced
2018–2023 · 45 TFSI Pro Line Advanced
2.0 l · 1984 cm³
no engine code
45 TFSI Pro Line S
2018–2023 · 45 TFSI Pro Line S
2.0 l · 1984 cm³
no engine code
50 TFSI e quattro Pro Line
2018–2023 · 50 TFSI e quattro Pro Line
2.0 l · 1984 cm³
no engine code
50 TFSI e quattro Pro Line Advanced
2018–2023 · 50 TFSI e quattro Pro Line Advanced
2.0 l · 1984 cm³
no engine code
50 TFSI e quattro Pro Line S
2018–2023 · 50 TFSI e quattro Pro Line S
2.0 l · 1984 cm³
no engine code
55 TFSI e quattro Competition
2018–2023 · 55 TFSI e quattro Competition
3.0 l · 2967 cm³
DDVE
45 TDI quattro Pro Line
2018–2023 · 45 TDI quattro Pro Line
3.0 l · 2967 cm³
DDVE
45 TDI quattro Pro Line Plus
2018–2023 · 45 TDI quattro Pro Line Plus
3.0 l · 2967 cm³
DDVE
45 TDI quattro Pro Line S
2018–2023 · 45 TDI quattro Pro Line S
3.0 l · 2967 cm³
DDVB · DDVC · AL552
50 TDI quattro
2018–2023 · 50 TDI quattro
3.0 l · 2995 cm³
DLZA
55 TFSI quattro
2018–2023 · 55 TFSI quattro
3.0 l · 2995 cm³
DLZA
55 TFSI quattro Pro Line
2018–2023 · 55 TFSI quattro Pro Line
3.0 l · 2995 cm³
DLZA
55 TFSI quattro Pro Line Plus
2018–2023 · 55 TFSI quattro Pro Line Plus
3.0 l · 2995 cm³
DLZA
55 TFSI quattro Pro Line S
2018–2023 · 55 TFSI quattro Pro Line S
Neighbouring generations
C8 (4K, 2018-2025). If the listing is from the changeover year, look at the neighbour too.
Common questions
2018–2025. 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.