Audi A8 - 2018
63.5 faults per 100 tests
Year average for all cars of 2018 is 123.2 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Audi A8, model year 2018.
Sample size: 1,224 cars, 2,806 tests and 1,782 recorded faults.
0%
Less faults compared to the average car of same model year
Less faults compared to the average car of same model year
Quick summary
Total: 1,224 cars
The 2018 Audi A8 has an overall defect rate of 64 per 100 vehicles, which is significantly lower than the average for cars of the same year, reported at 120 per 100 vehicles. This model shows particularly strong performance in several categories, including brakes and steering, where it has 44% and 89% fewer defects compared to the average, respectively. Additionally, defects related to visibility and lights are also notably lower than the average. While mileage trends indicate that defect rates increase with distance travelled, the Audi A8 consistently outperforms the average across all mileage segments. Overall, the A8 demonstrates a robust reliability profile in comparison to its peers.
Cars by mileage segment
Total: 1,224 cars
Categories
Brakes
▲ 45.8% better
37.3 faults / 100 tests
Year avg: 68.8 / 100 tests
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
- Brake lining or pad: worn down to wear indicator
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
Steering
▲ 90.0% better
0.5 faults / 100 tests
Year avg: 5.0 / 100 tests
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- A steering ball joint: with excessive wear or free play
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
Visibility
▲ 46.0% better
7.5 faults / 100 tests
Year avg: 13.9 / 100 tests
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Wiper blade: defective
- Obligatory mirror or device: slightly damaged or loose
Lights & Electrics
▲ 83.0% better
3.0 faults / 100 tests
Year avg: 17.6 / 100 tests
- Reflector defective or damaged: by up to 50% of the reflecting surface
- Headlamp cleaning device: inoperative in the case of LED or gas discharge systems (HID)
- The aim of a headlamp is not within limits laid down in the requirements
- Headlamp reflector or lens: slightly defective
- Stop lamp(s): all missing or inoperative
Wheels & Suspension
▲ 39.8% better
76.3 faults / 100 tests
Year avg: 126.7 / 100 tests
- Tyre tread depth not in accordance with the requirements
- A suspension pin, bush, joint or bearing: excessively worn
- A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
Body/Structure
▲ 92.2% better
0.4 faults / 100 tests
Year avg: 5.1 / 100 tests
- Fuel system: leaking, or missing or ineffective filler cap
- A door will not open using the relevant control or close properly
Equipment
▲ 90.9% better
0.2 faults / 100 tests
Year avg: 2.2 / 100 tests
- A statutory seat belt missing
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
Other
▲ 75.7% better
1.7 faults / 100 tests
Year avg: 7.0 / 100 tests
- Engine MIL inoperative or indicating a malfunction
- Engine MIL inoperative or indicating a malfunction
- Engine MIL inoperative or indicating a malfunction
- Engine MIL inoperative or indicating a malfunction
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
Fault rate by mileage segment
Model
Year average
* Metric: faults per 100 tests.
Most common faults (Top 10)
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 564
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 205
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 174
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 154
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 149
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 102
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 68
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 53
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 41
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 37
Serious faults (Top 10)
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 41
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 37
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 34
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 20
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 10
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 9
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 8
A wheel: with a loose or missing wheel nut, bolt or stud
FAIL
Occurrences: 6
A door will not open using the relevant control or close properly
FAIL
Occurrences: 5
A steering ball joint: with excessive wear or free play
FAIL
Occurrences: 4