Audi Q8 4M (2018-present) reliability
Audi Q8 4M built around 2018: not enough MOT data yet
We've only seen a handful of Audi Q8 4M models built around 2018 so far. Too few to spot a pattern yet.
Looking at an Audi Q8 4M?
Enter its number plate to see its full MOT history, risk rating and running costs.
Key figure
Check a car’s number plate to see its own MOT record, or come back when there’s more MOT history.
Based on 5,382 tests of Q8 models registered 2018+.
About 1 in 10 diesel Q8 cars registered in 2022 (10.5%) failed their first MOT.
Based on 295 first MOTs (DVSA MOT results, 2025).
4M fail rate by age
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 6 years old.
How the Q8 4M compares
At each age below, see how the Q8 4M holds up against other cars the same age. The averages combine all fuel types.
Based on 171,464 tests across 16 Audi models, built around 2018 (7 years old).
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs.
What to check before viewing
The model's most common MOT issues, turned into things you can ask about or look for.
Brake pads
High priorityAsk when the pads were last replaced and check the warning-light history.
Brake discs
High priorityAsk for the date and mileage of the last disc replacement; visually check for a deep wear lip and rust pitting on each disc.
Tyres
Worth checkingCheck tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.
Suspension bushes and joints
Worth checkingListen for knocks over speed bumps and ask about recent control-arm or anti-roll-bar work.
Vehicle-specific check
Worth checkingCheck the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.
Other SUVs to compare
Other SUVs, with each one's figures taken at the same age as the Q8 4M.
- 1
Mitsubishi Eclipse
Same body type, tested at the same age
- Fail rate
- 12.4%
No clear edge over the Audi Q8 4M on these figures.
Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.
3,969 MOT tests on cars built around 2018
- 2
Lexus NX
Same body type, tested at the same age
- Fail rate
- 9.5%
- Fail, no pass in 3 days
- 1%
- Dangerous
- 2.7%
- Still registered at 10 years
- 88.4%
Fewer dangerous faults: 2.7%, against 4.0% for the Audi Q8 4M.
4,706 MOT tests on cars built around 2018
- 3
Volkswagen T-Roc
Same body type, tested at the same age
- Fail rate
- 9.6%
- Fail, no pass in 3 days
- 0.9%
- Dangerous
- 3.9%
No clear edge over the Audi Q8 4M on these figures.
9,233 MOT tests on cars built around 2018
- 4
Porsche Macan
Same body type, tested at the same age
- Fail rate
- 8.7%
- Fail, no pass in 3 days
- 2%
- Dangerous
- 2.4%
- Still registered at 10 years
- 91.6%
Fewer dangerous faults: 2.4%, against 4.0% for the Audi Q8 4M.
4,936 MOT tests on cars built around 2018
- Fail rate
- = the share of MOT tests that ended in a fail. Retests count as tests.
- Fail, no pass in 3 days
- = the share of MOT tests that failed and still hadn't passed 3 days later. A fail that passed a retest within 3 days, even the same day, isn't counted.
- Dangerous
- = the share of MOT tests where the tester marked a fault as dangerous. It is against the law to drive the car until it is fixed.
- Still registered at 10 years
- = the share of cars still registered (taxed or declared off the road) 10 years after they were first registered.
Recall context
9 recalls in allAll 9 Q8 4M recalls cover cars built in these years.
- 1 Critical
- 8 more
Top concerns
- Software update for battery control unit
- Belt buckle rivet missing
- The function of the side airbag may be restricted due to the airbag not being sufficiently secured to the front left sea
For the exact car, check GOV.UK's recall checker with the number plate.
What has gone wrong on Q8 4M cars built around 2018
The share of diesel cars that have ever failed an MOT on each part of the car. Based on 50 cars.
How Q8 4M cars have aged
How Q8 4M cars have aged
How fail rates have changed as these cars got older. Each line follows cars first registered in about the same year across several years of MOT data. Not a prediction for any one car.
Some lines cover only a year or two, so read this as a rough guide.
4M variants compared
Most common issues on Audi Q8 models of this age
This list covers every Audi Q8 built around 2018, whichever generation it is. We don't have a defect list for the 4M on its own.
Most common advisories and fails
In order of the share of MOT tests that recorded each one
- 119.4%Advisory
Tyre worn close to the legal limit or worn on the edge
- 210.3%Advisory
Suspension arm pin or bush worn, but not moving too much
- 39.9%Advisory
Brake pads wearing thin
- 47.5%Advisory
Brake disc worn, pitted or scored, but not seriously weakened
- 54.7%Advisory
Brake disc worn, but not excessively
Based on 253 tests
Looking at an Audi Q8 4M?
Enter its number plate to see its full MOT history, risk rating and running costs.
Frequently asked questions
Built around 2018 (7 years old), the Audi Q8 4M (2018-present) fails MOTs noticeably less often than typical for this age. This is based on 252 7-year-old MOT tests from DVSA data. Each retest counts as a test.