Audi A8 - 2005
251.9 faults per 100 tests
Year average for all cars of 2005 is 377.4 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Audi A8, model year 2005.
Sample size: 371 cars, 722 tests and 1,819 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: 371 cars
The 2005 Audi A8 has an overall defect rate of 252 defects per 100 vehicles, which is significantly lower than the average of 376 defects per 100 vehicles for cars of the same year, representing a 33% improvement. Notably, the A8 excels in the braking and steering categories, with defect rates considerably below the average, indicating better reliability in these areas. Additionally, the model performs well in wheels, suspensions, and body structure compared to its peers. However, as mileage increases, particularly beyond 124,000 miles, the defect rate climbs to 443 per 100 vehicles, suggesting that older A8s may experience more issues.
Cars by mileage segment
Total: 371 cars
Categories
Brakes
▲ 35.7% better
101.9 faults / 100 tests
Year avg: 158.5 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake pipe damaged or excessively corroded
- Brake hose ferrules: excessively corroded
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
Steering
▲ 74.1% better
5.8 faults / 100 tests
Year avg: 22.4 / 100 tests
- 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.
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- A steering ball joint: with excessive wear or free play
Visibility
▲ 17.3% better
23.5 faults / 100 tests
Year avg: 28.4 / 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
- Wiper blade: missing or obviously not clearing the windscreen
- Obligatory mirror or device: slightly damaged or loose
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 15.4% better
93.1 faults / 100 tests
Year avg: 110.1 / 100 tests
- Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
- Headlamp reflector or lens: slightly defective
- Lamp: multiple light source up to a half not functioning
- Stop lamp(s): with a multiple light source up to 1/2 not functioning
Wheels & Suspension
▲ 31.8% better
214.1 faults / 100 tests
Year avg: 314.1 / 100 tests
- A suspension pin, bush, joint or bearing: excessively worn
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- Tyre tread depth not in accordance with the requirements
- A suspension pin, bush, joint or bearing: excessively worn
Body/Structure
▲ 67.2% better
20.2 faults / 100 tests
Year avg: 61.5 / 100 tests
- Exhaust system has a major leak or is insecure
- Exhaust system has a major leak or is insecure
- A transmission shaft constant velocity joint boot: severely deteriorated
- A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
- A body panel or body component: likely to become detached
Equipment
▲ 20.9% better
10.2 faults / 100 tests
Year avg: 12.9 / 100 tests
- Seat belt buckle missing, damaged or not functioning as intended
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- Seat belt buckle missing, damaged or not functioning as intended
- A seat belt: webbing or flexible stalk significantly stretched or weakened
Other
▲ 25.3% better
34.9 faults / 100 tests
Year avg: 46.7 / 100 tests
- 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
- Smoke opacity levels exceed the manufacturer’s specified limit
- Exhaust emits excessive smoke or vapour of any colour to an extent likely to obscure the vision of other road users
Fault rate by mileage segment
Model
Year average
* Metric: faults per 100 tests.
Most common faults (Top 10)
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 290
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 244
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 168
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 96
Headlamp reflector or lens: slightly defective
MINOR
Occurrences: 80
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 68
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 54
Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow
ADVISORY
Occurrences: 53
Lamp: multiple light source up to a half not functioning
MINOR
Occurrences: 43
A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
MINOR
Occurrences: 40
Serious faults (Top 10)
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 54
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 35
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 15
An SRS malfunction indicator lamp (MIL) indicates a system malfunction
FAIL
Occurrences: 12
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 12
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 11
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 10
Warning device shows system malfunction
FAIL
Occurrences: 8
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 8
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 7