Audi A1 - 2021
90.1 faults per 100 tests
Year average for all cars of 2021 is 80.0 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Audi A1, model year 2021.
Sample size: 15,782 cars, 37,221 tests and 33,529 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: 15,782 cars
The 2021 Audi A1 exhibits a higher overall defect rate of 90 defects per 100 vehicles, compared to the average of 79 defects per 100 vehicles for its year, indicating a 14.6% increase in issues. Notably, the A1 shows significantly better performance in categories such as visibility, lights and electrics, body/structure, and other defects, all of which have lower defect rates compared to the average. However, the A1 has higher defect rates in critical areas like brakes and wheels, with rates of 51% and 113%, respectively, which surpass the average figures. Additionally, the defect rate increases with mileage, particularly in the highest mileage bracket, suggesting a trend of more issues as the vehicle ages.
Cars by mileage segment
Total: 15,782 cars
Categories
Brakes
▼ 28.3% worse
51.3 faults / 100 tests
Year avg: 40.0 / 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
▼ 28.6% worse
0.9 faults / 100 tests
Year avg: 0.7 / 100 tests
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- Excessive wear or play in a universal joint or a flexible coupling excessively deteriorated
- 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
▲ 42.8% better
8.3 faults / 100 tests
Year avg: 14.5 / 100 tests
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Windscreen washers not working or not providing sufficient fluid to clear 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
▲ 72.3% better
3.1 faults / 100 tests
Year avg: 11.2 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- Headlamp reflector or lens: slightly defective
- The aim of a headlamp is not within limits laid down in the requirements
- Headlamp cleaning device: inoperative in the case of LED or gas discharge systems (HID)
- Headlamp cleaning device: inoperative in the case of LED or gas discharge systems (HID)
Wheels & Suspension
▼ 29.3% worse
112.9 faults / 100 tests
Year avg: 87.3 / 100 tests
- Tyre tread depth not in accordance with the requirements
- Tyre tread depth not in accordance with the requirements
- A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
- 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
Body/Structure
▲ 76.2% better
0.5 faults / 100 tests
Year avg: 2.1 / 100 tests
- 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
- 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
Equipment
▼ 80.0% worse
2.7 faults / 100 tests
Year avg: 1.5 / 100 tests
- Seat belt not functioning as intended or of an incorrect type
- Seat belt buckle missing, damaged or not functioning as intended
- A seat belt:
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
Other
▲ 81.5% better
0.5 faults / 100 tests
Year avg: 2.7 / 100 tests
- Engine MIL inoperative or indicating a malfunction
- Lambda coefficient outside the default limits or the range specified by the manufacturer
- 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
- Any part of the noise suppression system: insecure
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: 9,323
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 8,068
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 3,835
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 3,147
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 1,312
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 824
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 722
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 712
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 697
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 558
Serious faults (Top 10)
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 824
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 712
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 558
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 553
Brake disc or drum: significantly and obviously worn
FAIL
Occurrences: 133
Seat belt not functioning as intended or of an incorrect type
FAIL
Occurrences: 132
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 130
Seat belt buckle missing, damaged or not functioning as intended
FAIL
Occurrences: 85
Excessive fluctuation in brake effort through each wheel revolution
FAIL
Occurrences: 84
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 69