Audi Q4 - 2021
68.3 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 Q4, model year 2021.
Sample size: 4,072 cars, 7,486 tests and 5,110 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: 4,072 cars
The 2021 Audi Q4 displays a lower overall defect rate than the average car of the same year, with 68 defects per 100 vehicles compared to 79 on average, representing a 13% improvement. This model shows significant strengths in several categories, notably with brake issues occurring at just 5%, while the average is 38%, and steering defects at only 0.11% compared to 0.73%. However, it struggles with wheel, suspension, and axle defects, where the occurrence is 119%, exceeding the average of 87%. Mileage trends indicate higher defect rates in the higher mileage brackets, particularly noticeable after 93,000 miles, which aligns with general vehicle wear patterns.
Cars by mileage segment
Total: 4,072 cars
Categories
Brakes
▲ 87.5% better
5.0 faults / 100 tests
Year avg: 40.0 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake disc or drum: significantly and obviously worn
- Brake lining or pad: worn below 1.5mm
- Excessive fluctuation in brake effort through each wheel revolution
- Brakes imbalance across an axle such that: the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle. Or in the case of testing on the road, the vehicle deviates excessively from a straight lin
Steering
▲ 85.7% better
0.1 faults / 100 tests
Year avg: 0.7 / 100 tests
- A steering ball joint: with excessive wear or free play
- Power steering fluid leaking or system malfunctioning
Visibility
▲ 51.7% better
7.0 faults / 100 tests
Year avg: 14.5 / 100 tests
- Wiper blade: defective
- Wiper blade: missing or obviously not clearing the windscreen
- 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
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 65.2% better
3.9 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
- Headlamp cleaning device: inoperative in the case of LED or gas discharge systems (HID)
- The aim of a headlamp is not within limits laid down in the requirements
- Beam image obviously incorrect
Wheels & Suspension
▼ 36.2% worse
118.9 faults / 100 tests
Year avg: 87.3 / 100 tests
- 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 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 lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 90.5% better
0.2 faults / 100 tests
Year avg: 2.1 / 100 tests
- A body panel or body component: damaged or corroded and likely to cause injury when grazed or contacted, or insecure
- Bumper: insecure or with damage likely to cause injury when grazed or contacted
- A transmission shaft constant velocity joint boot: severely deteriorated
- A door will not open using the relevant control or close properly
- A door will not open using the relevant control or close properly
Equipment
▲ 20.0% better
1.2 faults / 100 tests
Year avg: 1.5 / 100 tests
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- Seat belt buckle missing, damaged or not functioning as intended
- A seat belt: or flexible stalk damaged
- A seat belt:
Other
▲ 96.3% better
0.1 faults / 100 tests
Year avg: 2.7 / 100 tests
- Any part of the noise suppression system: insecure
- 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
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: 2,971
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 318
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 282
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 244
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 188
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 168
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 148
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 107
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 105
The aim of a headlamp is not within limits laid down in the requirements
PRS
Occurrences: 87
Serious faults (Top 10)
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 318
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 282
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 148
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 38
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 31
An SRS malfunction indicator lamp (MIL) indicates a system malfunction
FAIL
Occurrences: 26
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 22
Tyres on the same axle or on twin wheels are different sizes
FAIL
Occurrences: 19
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 18
5.2.3 (i) (i)
FAIL
Occurrences: 10