Audi A6 - 2004
354.5 faults per 100 tests
Year average for all cars of 2004 is 384.6 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Audi A6, model year 2004.
Sample size: 1,099 cars, 2,283 tests and 8,093 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: 1,099 cars
The 2004 Audi A6 shows a lower overall defect rate compared to the yearly average, with 354 defects per 100 vehicles, which is 7% better than the average of 382 defects. Notably, the vehicle performs particularly well in the steering and equipment categories, with defect rates significantly below the average. Mileage trends indicate that defects generally increase with distance, but the A6 maintains competitive figures across different mileage brackets, especially in the higher mileage segments. While tyre wear is a common issue across all vehicles, the A6 stands out positively in several areas, making it a reliable choice for its age.
Cars by mileage segment
Total: 1,099 cars
Categories
Brakes
▲ 8.3% better
150.6 faults / 100 tests
Year avg: 164.2 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
- Significant brake effort recorded with no brake applied indicating a binding brake
- Brake pipe damaged or excessively corroded
- Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
Steering
▲ 33.7% better
16.5 faults / 100 tests
Year avg: 24.9 / 100 tests
- 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
- 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
▲ 21.2% better
23.1 faults / 100 tests
Year avg: 29.3 / 100 tests
- Obligatory mirror or device: slightly damaged or loose
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Wiper blade: defective
- Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 11.7% better
97.0 faults / 100 tests
Year avg: 109.9 / 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
- Beam image obviously incorrect
- Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
Wheels & Suspension
▲ 2.3% better
305.8 faults / 100 tests
Year avg: 312.9 / 100 tests
- A suspension pin, bush, joint or bearing: excessively worn
- A suspension component: excessively damaged or corroded
- A suspension pin, bush, joint or bearing: excessively worn
- Tyre tread depth not in accordance with the requirements
- A spring: or spring component fractured or seriously weakened
Body/Structure
▲ 22.0% better
49.6 faults / 100 tests
Year avg: 63.6 / 100 tests
- 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
- 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
Equipment
▲ 29.7% better
9.7 faults / 100 tests
Year avg: 13.8 / 100 tests
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- Seat belt buckle missing, damaged or not functioning as intended
- A seat belt:
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- is significantly reduced or The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a ’prescribed area’): inadequately repaired
Other
▼ 12.1% worse
56.6 faults / 100 tests
Year avg: 50.5 / 100 tests
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Exhaust emits excessive smoke or vapour of any colour to an extent likely to obscure the vision of other road users
- Engine MIL inoperative or indicating a malfunction
- Smoke opacity levels exceed the manufacturer’s specified limit
- Engine MIL inoperative or indicating a malfunction
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: 1,033
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 757
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 533
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 493
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 326
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 312
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 248
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 233
A transmission shaft constant velocity joint boot: severely deteriorated
MINOR
Occurrences: 198
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 179
Serious faults (Top 10)
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 233
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 132
Beam image obviously incorrect
FAIL
Occurrences: 107
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 85
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 68
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 49
A steering ball joint: with excessive wear or free play
FAIL
Occurrences: 41
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 40
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 36
Smoke opacity levels exceed the manufacturer’s specified limit
FAIL
Occurrences: 34