Audi A4 - 2020
86.4 faults per 100 tests
Year average for all cars of 2020 is 91.3 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Audi A4, model year 2020.
Sample size: 9,969 cars, 22,253 tests and 19,229 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: 9,969 cars
The 2020 Audi A4 demonstrates a slightly lower overall defect rate of 86 per 100 vehicles compared to the yearly average of 90 per 100. Notably, it excels in several categories, including steering, where it shows a significant improvement, with only 0.04 defects per 100 vehicles compared to the average of 1.44. The model also has fewer issues related to visibility and lights, with defects at 7.9 and 3.49 per 100 vehicles, respectively. However, it faces challenges in the wheels, suspensions, and axles category, showing a higher defect rate of 119 compared to the average of 97. Mileage trends indicate that defects tend to increase with higher mileage across both the Audi A4 and the average vehicle.
Cars by mileage segment
Total: 9,969 cars
Categories
Brakes
▲ 20.3% better
40.5 faults / 100 tests
Year avg: 50.8 / 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
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 1.5 / 100 tests
- A steering ball joint: with excessive wear or free play
- Power steering: inoperative and steering adversely affected
- Excessive roughness in operation of steering
Visibility
▲ 44.0% better
7.9 faults / 100 tests
Year avg: 14.1 / 100 tests
- Wiper blade: defective
- 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: missing or obviously not clearing the windscreen
- Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 68.8% better
3.5 faults / 100 tests
Year avg: 11.2 / 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
- The aim of a headlamp is not within limits laid down in the requirements
- Lamp: multiple light source up to a half not functioning
- An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
Wheels & Suspension
▼ 21.6% worse
118.6 faults / 100 tests
Year avg: 97.5 / 100 tests
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
- Tyre tread depth not in accordance with the requirements
- A spring: or spring component fractured or seriously weakened
- Tyre tread depth not in accordance with the requirements
Body/Structure
▲ 70.8% better
0.7 faults / 100 tests
Year avg: 2.4 / 100 tests
- A passenger seat: with a defective structure or the backrest cannot be retained in the upright position
- 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
- A transmission shaft constant velocity joint boot: severely deteriorated
- A door will not open using the relevant control or close properly
Equipment
▲ 60.0% better
0.6 faults / 100 tests
Year avg: 1.5 / 100 tests
- Seat belt buckle missing, damaged or not functioning as intended
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- Seat belt buckle missing, damaged or not functioning as intended
- A seat belt:
Other
▲ 73.0% better
1.0 faults / 100 tests
Year avg: 3.7 / 100 tests
- 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
- 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: 6,260
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 2,392
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 1,571
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 1,547
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 1,200
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 868
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 700
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 585
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 576
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 418
Serious faults (Top 10)
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 700
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 585
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 373
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 277
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 94
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 77
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 52
A wheel: with a loose or missing wheel nut, bolt or stud
FAIL
Occurrences: 48
A shock absorber damaged … or showing signs of severe leakage
FAIL
Occurrences: 46
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 42