Audi A4 - 2018
108.4 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 A4, model year 2018.
Sample size: 15,153 cars, 36,356 tests and 39,414 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: 15,153 cars
The 2018 Audi A4 exhibits a lower overall defect rate than the average car of the same year, with 108 defects per 100 vehicles compared to the average of 120. Notably, the Audi A4 shows significant strengths in several categories, including brakes, where it has 48 defects per 100 vehicles, considerably better than the average of 67. It also stands out with minimal issues in steering and lights, with only 0.18 and 4.25 defects per 100 vehicles, respectively. While mileage-related trends indicate an increase in defects as mileage rises, the A4 remains competitive across all mileage segments compared to the average. Overall, the Audi A4 demonstrates a reliable performance with fewer defects in key areas compared to its peers.
Cars by mileage segment
Total: 15,153 cars
Categories
Brakes
▲ 29.5% better
48.5 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
- Excessive fluctuation in brake effort through each wheel revolution
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
Steering
▲ 96.0% better
0.2 faults / 100 tests
Year avg: 5.0 / 100 tests
- Track rod or drag link ends seriously misaligned
- Power steering fluid leaking or system malfunctioning
- A steering ball joint: with excessive wear or free play
- Excessive roughness in operation of steering
- Steering linkage retaining or locking device missing or ineffective
Visibility
▲ 27.3% better
10.1 faults / 100 tests
Year avg: 13.9 / 100 tests
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Wiper blade: missing or obviously not clearing the windscreen
- Wiper blade: missing or obviously not clearing the windscreen
- Wiper blade: defective
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 75.6% better
4.3 faults / 100 tests
Year avg: 17.6 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- Reflector defective or damaged: by up to 50% of the reflecting surface
- A lens defective: which has no effect on emitted light
- The aim of a headlamp is not within limits laid down in the requirements
- Lamp: multiple light source up to a half not functioning
Wheels & Suspension
▼ 17.8% worse
149.2 faults / 100 tests
Year avg: 126.7 / 100 tests
- Tyre tread depth not in accordance with the requirements
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A spring: or spring component fractured or seriously weakened
- A suspension pin, bush, joint or bearing: excessively worn
- A spring: or spring component fractured or seriously weakened
Body/Structure
▲ 68.6% better
1.6 faults / 100 tests
Year avg: 5.1 / 100 tests
- 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
- Bumper: insecure or with damage likely to cause injury when grazed or contacted
- A transmission shaft constant velocity joint boot: severely deteriorated
- A main load-bearing structural member: fractured or deformed such that structural rigidity is significantly reduced
Equipment
▲ 68.2% better
0.7 faults / 100 tests
Year avg: 2.2 / 100 tests
- Seat belt buckle missing, damaged or not functioning as intended
- A seat belt:
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- ESC MIL indicates a system malfunction
Other
▲ 70.0% better
2.1 faults / 100 tests
Year avg: 7.0 / 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
- Engine MIL inoperative or indicating a malfunction
- 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)
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 10,547
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 5,354
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 4,009
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 2,603
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 2,451
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 2,155
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 1,490
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 1,271
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 1,169
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 892
Serious faults (Top 10)
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 2,155
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 1,169
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 779
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 560
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 368
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 315
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 229
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 138
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 135
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 118