Audi Q8 reliability, MPG and running costs
Figures updated
The Audi Q8 is a car. In 2024 MOT tests it scored 180 for reliability (100 is average), ranking 33 of 442, and 8.9% failed first time against a UK average of 28.5%. Its most common MOT failure is condition (1.9% of tests).
Ranked 33 of 442 cars in the 2024 MOT Reliability League
In 2024, 3,956 Audi Q8s aged 3 to 20 had an MOT and 8.9% failed first time (UK average 28.5%). Taking age and mileage into account, the Audi Q8 is 44% less likely to fail than the average car of the same age and mileage. At the first MOT, at three years old, 8.5% failed (UK 12.7%).
First-time fail rate
8.9%
UK 28.5%
Fail rate at 3 years
8.5%
UK 12.7%
Average miles a year
10,600
Typical age at test: 4 years
Audi Q8 MOT failure rate by age
Most common Audi Q8 MOT faults
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.9% of tests
- Tread depth: tread depth below requirements of 1.6mm1.4% of tests
- Malfunction indicator lamp: inoperative or indicates a malfunction1.2% of tests
- Condition: has ply or cords exposed1.0% of tests
- Registration plates: does not conform to the specified requirements0.9% of tests
- Brake pads: less than 1.5 mm thick0.4% of tests
What the Audi Q8 fails on
| Area | Tests failing | vs similar cars |
|---|---|---|
| Tyres | 4.6% | ▼ 21% less often |
| Exhaust and emissions | 1.2% | ▲ 1.2× as often |
| Brakes | 0.9% | ▼ 70% less often |
| Visibility | 0.9% | ▼ 74% less often |
| Lights and electrics | 0.8% | ▼ 78% less often |
| Suspension | 0.4% | ▼ 73% less often |
| Wheels | 0.3% | ▲ 1.3× as often |
| Seat belts and airbags | 0.1% | ▼ 60% less often |
| Body and structure | 0.1% | ▼ 72% less often |
| Steering | 0.0% | ▼ 92% less often |
What MPG does the Audi Q8 do?
Official economy for the Audi Q8 ranges from 27.4 to 41.5mpg across the 8 versions listed by the Vehicle Certification Agency (2018–2025). A typical diesel version manages 41.5mpg. Electric versions average 3 miles per kWh, with an official range of 283 to 345 miles. Expect 10–15% less in real-world driving.
Work out a journey's fuel costHow much is road tax on a Audi Q8?
Any Audi Q8 first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates). A Audi Q8 registered between March 2001 and March 2017 is taxed on its CO2: £360 a year.
Work out tax for a specific carAudi Q8 specs and running costs
Official figures for 8 versions sold in the UK between 2018 and 2025.
Fuel types
Diesel, Electric, Hybrid, Plug-in hybrid
Official economy
27.4–41.5 mpg
Electric range
283–345 miles
Efficiency
3.0 mi/kWh
CO2
35–234 g/km
Power
286–408 PS
| Version | Fuel | Economy | CO2 | Car tax | Company car tax |
|---|---|---|---|---|---|
| Q8 e-tron 50 e-tron340 PS · N/A · listed 2025 | Electric | 3 mi/kWh | 0g | £200 | 4% |
| Q8 Sportback e-tron 50 e-tron340 PS · N/A · listed 2025 | Electric | 3 mi/kWh | 0g | £200 | 4% |
| Q8 e-tron 55 e-tron408 PS · N/A · listed 2025 | Electric | 3 mi/kWh | 0g | £200 | 4% |
| Q8 Sportback e-tron 55 e-tron408 PS · N/A · listed 2025 | Electric | 3 mi/kWh | 0g | £200 | 4% |
| Q8 TDI quattro 286PS tiptronic286 PS · A8 · listed 2025 | Hybrid | 34.9 mpg | 212g | £200 | 37% |
| Q8 SUV TFSI quattro 340PS tiptronic340 PS · A8 · listed 2025 | Hybrid | 27.4 mpg | 234g | £200 | 37% |
| Q8 SUV TFSI e quattro 394PS tiptronic394 PS · A8 · listed 2025 | Plug-in hybrid | 188.3 mpg | 35g | £200 | 10% |
| Q8 50 TDI quattro 286PS 8speed TiptronicA8 · listed 2018 | Diesel | 41.5 mpg | 178g | £200 | – |
Economy and CO2 are official NEDC (before 2018) or WLTP figures. Car tax is the yearly rate at current rates for a car first registered in the year listed, before any expensive car supplement. Company car tax is the 2026/27 benefit-in-kind rate.
What a Audi Q8 costs to fuel
- diesel, typical official 41.5mpg…
- Electric, typical official 3 miles per kWh…
Official figures are usually 10–15% better than real-world driving.
Work out your charging costsWork out a journey in a Audi Q8Buying a used Audi Q8?
Check the MOT history of the exact car: every result, advisory and mileage reading, free.
Other Audi models
Frequently asked questions
›Is the Audi Q8 reliable?
Its MOT record is better than average: the Audi Q8 is 44% less likely to fail than the average car of the same age and mileage, with a reliability score of 180 in our 2024 league (100 is average).
›What are common problems with the Audi Q8?
The most common MOT fault is “Condition: has a cut in excess of the requirements deep enough to reach the ply or cords”, found in 1.9% of tests.
›What MPG does the Audi Q8 do?
Official economy for the Audi Q8 ranges from 27.4 to 41.5mpg across the 8 versions listed by the Vehicle Certification Agency (2018–2025). A typical diesel version manages 41.5mpg. Electric versions average 3 miles per kWh, with an official range of 283 to 345 miles. Expect 10–15% less in real-world driving.
›How much is road tax on a Audi Q8?
Any Audi Q8 first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates). A Audi Q8 registered between March 2001 and March 2017 is taxed on its CO2: £360 a year.
›How many Audi Q8s fail their MOT?
8.9% of Audi Q8s aged 3 to 20 failed their MOT first time in 2024, and 8.5% failed at their first MOT.
Sources: DVSA anonymised MOT tests 2024, all versions of the Audi Q8 combined (Open Government Licence v3.0); official economy and CO2 from Vehicle Certification Agency data, © Crown copyright. VCA cannot accept liability for its accuracy. How we calculate the league.