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
vinkodex.Audi Allroad C8 common faults.
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
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.
critical2
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 and 1 more.
expensive4
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.
The combined housing of the water pump and the thermostat is plastic, and it is bolted directly to the hot engine block.
Applies to the engine DLGA, DRYA.
The crankcase ventilation (PCV) of the third generation 1.8/2.0 TSI fails less often than its predecessors, but it is not faultless.
Applies to the engine DLGA, DRYA.
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 DLGA, DRYA.
cheap repair1
The per cylinder ignition coil of these direct injection, turbocharged petrol engines fails.
Applies to the engine DLGA, DRYA.
C8 · 2018–2025
Pick the version.
The fault list opens on the version page.
6 versions
EngineVersionPowerFuel · transmissionBody
2.0 l · 1984 cm³
DLGA · AL552
allroad e-hybrid quattro
2025– · allroad e-hybrid quattro
252 HPpetrol · automaticestate3.0 l · 2967 cm³
DDVE · AL552
45 TDI quattro
2019–2023 · 45 TDI quattro
231 HPdiesel · automaticestate3.0 l · 2967 cm³
DDVB · DMGA · AL552
50 TDI quattro
2019–2023 · 50 TDI quattro
286 HPdiesel · automaticestate3.0 l · 2967 cm³
DEWA · AL552
55 TDI quattro
2019–2023 · 55 TDI quattro
349 HPdiesel · automaticestate3.0 l · 2995 cm³
DLZA · AL952
55 TFSI quattro Pro Line
2019–2023 · 55 TFSI quattro Pro Line
340 HPpetrol · automaticestate3.0 l · 2995 cm³
DLZA · AL552
55 TFSI quattro Pro Line Advanced
2019–2023 · 55 TFSI quattro Pro Line Advanced
340 HPpetrol · automaticestate
Neighbouring generations
C8 · 2018–2025
C8 (2018-2025). If the listing is from the changeover year, look at the neighbour too.
Common questions
About this generation
Which years does this page cover?
2018–2025. 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.