AUDI Q8 (2021)
Running costs, common problems, and reliability data based on 59 real MOT tests in 2024.
MOT Pass Rate
97%
Total Tests (2024)
59
Avg Mileage
33,348 mi
Est. Annual Cost
£1,690
Is the 2021 AUDI Q8 reliable?
Excellent reliability. Very few MOT failures. That's 15 points above the national average of 82%. It also outperforms the AUDI brand average of 90%.
At 3 years old, 97% of AUDI Q8s from 2021 passed their MOT first time in 2024. That's based on 59 tests across the UK. The average mileage at this age is 33,348 miles.
How does the 2021 AUDI Q8 compare?
Mileage Analysis
The average 2021 AUDI Q8 has 33,348 miles on the clock, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.
How much does a 2021 AUDI Q8 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
AUDI Q8 by Year
Checking a specific AUDI Q8?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 AUDI Q8
The 2021 AUDI Q8 is a premium performance with a 2967cc diesel engine. 59 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 13% of all 2021 cars for reliability.
With an average of 33,348 miles at 3 years old, AUDI Q8 owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.
2021 AUDI Q8 Fuel Costs
The 2967cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 AUDI Q8?
Total estimated annual running cost is £1,690 (£141/month), broken down as £1245 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 97% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
AUDI Q8 Reliability Trend
The AUDI Q8 has maintained consistent MOT pass rates across model years, varying by only 2 percentage points.
Buying a Used 2021 AUDI Q8
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. Note: with only 59 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2021 AUDI Q8
The AUDI Q8 is actually the most reliable option among similar diesel premium performances from this era. Here are comparable diesel cars with similar engines:
- MERCEDES E (2019) 90% pass rate (-7%) from 41,000 tests
- FORD RANGER (2019) 87% pass rate (-10%) from 32,194 tests
- AUDI Q5 (2019) 93% pass rate (-4%) from 24,241 tests
- AUDI A5 (2019) 90% pass rate (-7%) from 22,290 tests