Audi A4 - 2003
395.2 faults per 100 tests
Year average for all cars of 2003 is 380.4 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Audi A4, model year 2003.
Sample size: 3,968 cars, 8,238 tests and 32,560 recorded faults.
0%
More faults compared to the average car of same model year
More faults compared to the average car of same model year
Quick summary
Total: 3,968 cars
The 2003 Audi A4 has an overall defect rate of 395 per 100 vehicles, which is slightly higher than the yearly average of 378 per 100, indicating a 4.5% increase in defects compared to similar cars of the same year. Notably, this model performs better in categories such as steering and body/structure, with defects in these areas being significantly lower than the average. However, it struggles with wheels, suspensions, and axles, showing a higher rate of defects than the average for its year. As for mileage trends, the defect rate increases with mileage, particularly in the highest mileage category, where it reaches 515 per 100 vehicles.
Cars by mileage segment
Total: 3,968 cars
Categories
Brakes
▲ 6.7% better
158.0 faults / 100 tests
Year avg: 169.3 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
- Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
- Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
- Significant brake effort recorded with no brake applied indicating a binding brake
Steering
▲ 37.7% better
15.7 faults / 100 tests
Year avg: 25.2 / 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.
- A steering ball joint: with excessive wear or free play
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- Free play in the steering, measured at the rim of the steering wheel is: excessive
Visibility
▲ 2.3% better
29.1 faults / 100 tests
Year avg: 29.8 / 100 tests
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Wiper blade: defective
- Obligatory mirror or device: slightly damaged or loose
- Wiper blade: missing or obviously not clearing the windscreen
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▼ 0.9% worse
103.7 faults / 100 tests
Year avg: 102.8 / 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
- Headlamp reflector or lens: slightly defective
- The aim of a headlamp is not within limits laid down in the requirements
- Lamp emitted colour, position or intensity not in accordance with the requirements
- Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow
Wheels & Suspension
▼ 25.7% worse
379.6 faults / 100 tests
Year avg: 302.1 / 100 tests
- A suspension pin, bush, joint or bearing: excessively worn
- A suspension component: excessively damaged or corroded
- 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
▲ 45.7% better
35.4 faults / 100 tests
Year avg: 65.2 / 100 tests
- A transmission shaft constant velocity joint boot: severely deteriorated
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- 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
- Exhaust system has a major leak or is insecure
Equipment
▲ 20.6% better
10.8 faults / 100 tests
Year avg: 13.6 / 100 tests
- ESC MIL indicates a system malfunction
- A seat belt:
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- Seat belt buckle missing, damaged or not functioning as intended
Other
▼ 10.4% worse
58.2 faults / 100 tests
Year avg: 52.7 / 100 tests
- 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
- 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
- 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: 5,093
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 2,863
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 1,844
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 1,680
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 1,652
Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
ADVISORY
Occurrences: 1,288
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 1,192
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: 1,027
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 904
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 697
Serious faults (Top 10)
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 1,192
Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
FAIL
Occurrences: 370
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 262
Warning device shows system malfunction
FAIL
Occurrences: 249
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 235
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 198
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 196
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 182
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 175
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 170