Audi S4 - 2020
67.8 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 S4, model year 2020.
Sample size: 883 cars, 2,117 tests and 1,435 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: 883 cars
The 2020 Audi S4 has a notably lower overall defect rate of 68 defects per 100 vehicles compared to the average of 90 defects per 100 vehicles for cars of the same year, representing a 25% improvement. This model performs particularly well in categories such as brakes, steering, and body structure, showing significant reductions in defect rates compared to the average. While tyre wear is a common issue across vehicles, it is not specifically highlighted as a major concern for this model. The defect trends also indicate that as mileage increases, the Audi S4 maintains a relatively consistent performance compared to the yearly average, particularly in the higher mileage categories.
Cars by mileage segment
Total: 883 cars
Categories
Brakes
▲ 25.2% better
38.0 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
- Brake lining or pad: worn down to wear indicator
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
Steering
▲ 86.7% better
0.2 faults / 100 tests
Year avg: 1.5 / 100 tests
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
Visibility
▲ 48.9% better
7.2 faults / 100 tests
Year avg: 14.1 / 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
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Wiper blade: defective
- Windscreen or window damaged or seriously discoloured: and affecting the driver’s view of the road or of an obligatory external mirror
Lights & Electrics
▲ 69.6% better
3.4 faults / 100 tests
Year avg: 11.2 / 100 tests
- 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
- A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
- A lens defective: which has no effect on emitted light
Wheels & Suspension
▲ 13.1% better
84.7 faults / 100 tests
Year avg: 97.5 / 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 tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A spring: or spring component fractured or seriously weakened
- A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
Body/Structure
▲ 87.5% better
0.3 faults / 100 tests
Year avg: 2.4 / 100 tests
- Bumper: insecure or with damage likely to cause injury when grazed or contacted
- A passenger seat: with a defective structure or the backrest cannot be retained in the upright position
Equipment
▲ 73.3% better
0.4 faults / 100 tests
Year avg: 1.5 / 100 tests
- A seat belt:
- Seat belt buckle missing, damaged or not functioning as intended
Other
▲ 62.2% better
1.4 faults / 100 tests
Year avg: 3.7 / 100 tests
- 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
- Emissions test unable to be completed
- Lambda coefficient outside the default limits or the range specified by the manufacturer
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: 392
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 179
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 143
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 143
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 134
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 54
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 44
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 42
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 40
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 39
Serious faults (Top 10)
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 42
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 39
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 13
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 13
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 8
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 8
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 8
A wheel: with a loose or missing wheel nut, bolt or stud
FAIL
Occurrences: 7
Excessive fluctuation in brake effort through each wheel revolution
FAIL
Occurrences: 5
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 4