Audi A4 - 2008
299.9 faults per 100 tests
Year average for all cars of 2008 is 340.8 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Audi A4, model year 2008.
Sample size: 16,630 cars, 36,977 tests and 110,886 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: 16,630 cars
The 2008 Audi A4 demonstrates a lower overall defect rate compared to the average car of the same year, with 300 defects per 100 vehicles, which is 11% better than the average of 337. Notably, the A4 excels in the categories of brakes, lights and electrics, and equipment, showing significant improvements over the average defect rates in these areas. In terms of mileage-related trends, the defect rate increases with mileage, but the A4 maintains a relatively steady performance, particularly in the higher mileage segments. Overall, this model stands out for its reliability in critical safety-related categories while showing fewer concerns than its peers.
Cars by mileage segment
Total: 16,630 cars
Categories
Brakes
▲ 26.0% better
98.5 faults / 100 tests
Year avg: 133.1 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
- Brake hose ferrules: excessively corroded
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
Steering
▲ 5.0% better
17.1 faults / 100 tests
Year avg: 18.0 / 100 tests
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- Free play in the steering, measured at the rim of the steering wheel is: excessive
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- A steering ball joint: with excessive wear or free play
- A steering ball joint: with excessive wear or free play
Visibility
▲ 18.6% better
20.6 faults / 100 tests
Year avg: 25.3 / 100 tests
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Wiper blade: defective
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Wiper blade: missing or obviously not clearing the windscreen
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 40.6% better
54.8 faults / 100 tests
Year avg: 92.2 / 100 tests
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
- Beam image obviously incorrect
- Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
- The aim of a headlamp is not within limits laid down in the requirements
- The aim of a headlamp is not within limits laid down in the requirements
Wheels & Suspension
▼ 5.1% worse
326.2 faults / 100 tests
Year avg: 310.3 / 100 tests
- A suspension pin, bush, joint or bearing: excessively worn
- A suspension component: excessively damaged or corroded
- A spring: or spring component fractured or seriously weakened
- Tyre tread depth not in accordance with the requirements
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 12.5% better
44.9 faults / 100 tests
Year avg: 51.3 / 100 tests
- A transmission shaft constant velocity joint boot: severely deteriorated
- 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: missing, split, insecure or no longer prevents the ingress of dirt
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
Equipment
▲ 40.6% better
6.0 faults / 100 tests
Year avg: 10.1 / 100 tests
- ESC MIL indicates a system malfunction
- 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
- Seat belt buckle missing, damaged or not functioning as intended
Other
▲ 23.1% better
31.7 faults / 100 tests
Year avg: 41.2 / 100 tests
- Engine MIL inoperative or indicating a malfunction
- Smoke opacity levels exceed the manufacturer’s specified limit
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Engine MIL inoperative or indicating a malfunction
- Any part of the noise suppression system: insecure
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: 17,662
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 12,641
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 5,691
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 4,094
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 3,887
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 3,528
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 3,321
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 3,112
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 3,090
A transmission shaft constant velocity joint boot: severely deteriorated
MINOR
Occurrences: 3,059
Serious faults (Top 10)
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 2,612
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 2,048
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 1,575
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 1,258
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 1,210
Beam image obviously incorrect
FAIL
Occurrences: 723
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 684
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 670
Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 617
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 556