Audi S4 - 2009
153.1 faults per 100 tests
Year average for all cars of 2009 is 311.0 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Audi S4, model year 2009.
Sample size: 164 cars, 341 tests and 522 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: 164 cars
The 2009 Audi S4 shows a significantly lower overall defect rate compared to the average car of the same year, with 153 defects per 100 vehicles versus 310. This model particularly excels in areas such as brakes and steering, where it has a 61% and 93% lower defect rate, respectively. Mileage trends indicate an increase in defects as mileage rises, especially in the 62,000 to 93,000 miles range, where the S4's defect rate spikes to 340. Other categories where the S4 performs well include visibility and lights, both showing much fewer issues than average. Overall, the S4 demonstrates significantly better reliability in critical areas compared to its peers.
Cars by mileage segment
Total: 164 cars
Categories
Brakes
▲ 59.6% better
47.5 faults / 100 tests
Year avg: 117.5 / 100 tests
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake hose ferrules: excessively corroded
Steering
▲ 92.6% better
1.2 faults / 100 tests
Year avg: 16.3 / 100 tests
- A steering ball joint: with excessive wear or free play
- Excessive wear or play in a universal joint or a flexible coupling excessively deteriorated
Visibility
▲ 74.8% better
5.9 faults / 100 tests
Year avg: 23.4 / 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
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- A bonnet: which cannot be safely secured in the closed position
Lights & Electrics
▲ 74.7% better
20.5 faults / 100 tests
Year avg: 80.9 / 100 tests
- Lamp: multiple light source up to a half not functioning
- Stop lamp(s): with a multiple light source up to 1/2 not functioning
- The aim of a headlamp is not within limits laid down in the requirements
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
- The aim of a headlamp is not within limits laid down in the requirements
Wheels & Suspension
▲ 33.5% better
199.4 faults / 100 tests
Year avg: 299.8 / 100 tests
- Tyre tread depth not in accordance with the requirements
- A suspension component: excessively damaged or corroded
- A suspension pin, bush, joint or bearing: excessively worn
- A spring: or spring component fractured or seriously weakened
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 78.8% better
8.8 faults / 100 tests
Year avg: 41.5 / 100 tests
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- Exhaust system has a major leak or is insecure
- 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
Equipment
▲ 85.5% better
1.2 faults / 100 tests
Year avg: 8.3 / 100 tests
- ESC MIL indicates a system malfunction
Other
▲ 36.9% better
21.7 faults / 100 tests
Year avg: 34.4 / 100 tests
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Any part of the noise suppression system: insecure
- Exhaust noise levels in excess of those permitted
- Emissions levels exceed the manufacturer’s specified limits
- Emissions levels exceed default limits
Fault rate by mileage segment
Model
Year average
* Metric: faults per 100 tests.
Most common faults (Top 10)
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 121
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 73
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 31
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 28
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 26
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 26
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 21
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 18
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 15
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 11
Serious faults (Top 10)
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 15
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 10
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 9
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 6
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 3
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 3
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 3
Excessive fluctuation in brake effort through each wheel revolution
FAIL
Occurrences: 2
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 2
ESC MIL indicates a system malfunction
FAIL
Occurrences: 2