AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A (2021)
Running costs, reliability data, and common problems from 255 real MOT tests.
Annual Cost
£1,695
£141/month
MOT Pass Rate
95%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 30-42
2967cc Diesel
Great Choice
95% pass rate, £1695/year to run. 13 points above average.
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Annual Running Costs
~40 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 13 points above the national average of 82%. It also outperforms the AUDI brand average of 90%.
At 5 years old, 95% of AUDI Q8 SLN VSPRUNG 50TDI MHEV QT As from 2021 passed their MOT first time in 2026. That's based on 255 tests across the UK. The average mileage at this age is 34,544 miles.
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How Does It Compare?
Mileage Analysis
34,544
Average miles
37,000
Expected for age
The average 2021 AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A has 34,544 miles on the clock, which is in line with the expected 37,000 miles for a 5-year-old car, suggesting normal everyday use.
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About the 2021 AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A
The 2021 AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A is a premium performance with a 2967cc diesel engine. 255 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 34,544 miles at 5 years old, AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A owners drive about as much as the UK average.
2021 AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A 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). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2021 AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A?
Total estimated annual running cost is £1,695 (£141/month), broken down as £1245 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 95% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A
At 5 years old, the AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Common Issues to Watch For
Based on the 2021 AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Medium riskDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
EGR Valve
Low riskExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
Dual Mass Flywheel
Medium riskLarger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2021 AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| AUDI Q8 SLN VSPRUNG 50TDI MHEV QT A(2021) | 95% | £1245 | £195 | Grp 30-42 | £1695 |
| MERCEDES E(2019) | 90% | £1245 | £190 | Grp 30-42 | £1690-£5 |
| FORD RANGER(2019) | 87% | £1245 | £190 | Grp 35-50 | £1840+£145 |
| AUDI Q5(2019) | 93% | £1245 | £190 | Grp 30-42 | £1690-£5 |
| AUDI A5(2019) | 90% | £1245 | £190 | Grp 30-42 | £1690-£5 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Audi Models
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MERCEDES E
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