Porsche 911 - 2020
24.4 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 Porsche 911, model year 2020.
Sample size: 2,381 cars, 6,242 tests and 1,524 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: 2,381 cars
The 2020 Porsche 911 has a significantly lower overall defect rate of 24 per 100 vehicles, compared to the yearly average of 90 per 100. This model stands out particularly in categories such as brakes, steering, and visibility, where its defect rates are much lower than average, indicating superior performance in these areas. Despite some common tyre wear issues, the 911 also shows strong results in lights and electrics, with markedly fewer defects than typical. Mileage-related trends suggest that the defect rate increases with higher mileage, but the Porsche maintains a consistently low defect rate compared to other vehicles in its age group.
Cars by mileage segment
Total: 2,381 cars
Categories
Brakes
▲ 95.9% better
2.1 faults / 100 tests
Year avg: 50.8 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
- Electronic parking brake MIL indicates a malfunction
- Brake disc or drum: significantly and obviously worn
- Brake lining or pad: worn down to wear indicator
Steering
▲ 86.7% better
0.2 faults / 100 tests
Year avg: 1.5 / 100 tests
- A steering ball joint: with excessive wear or free play
- A steering linkage component: fractured or deformed
Visibility
▲ 82.3% better
2.5 faults / 100 tests
Year avg: 14.1 / 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
▲ 86.6% better
1.5 faults / 100 tests
Year avg: 11.2 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
- Lamp: multiple light source up to a half not functioning
- The aim of a headlamp is not within limits laid down in the requirements
- A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
Wheels & Suspension
▲ 58.4% better
40.6 faults / 100 tests
Year avg: 97.5 / 100 tests
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- 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
Body/Structure
▲ 95.8% better
0.1 faults / 100 tests
Year avg: 2.4 / 100 tests
- A transmission shaft constant velocity joint boot: severely deteriorated
- A door will not open using the relevant control or close properly
Equipment
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 1.5 / 100 tests
- is significantly reduced or The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a ’prescribed area’): inadequately repaired
Other
▲ 54.1% better
1.7 faults / 100 tests
Year avg: 3.7 / 100 tests
- Emissions levels exceed default limits
- 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
- Lambda coefficient outside the default limits or the range specified by the manufacturer
- Emission control equipment fitted by the manufacturer: missing, obviously modified or obviously defective
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: 610
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 386
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 84
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 65
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 52
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 46
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 39
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 36
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 31
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 30
Serious faults (Top 10)
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 52
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 46
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 36
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 10
Emissions levels exceed default limits
FAIL
Occurrences: 6
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 5
Lambda coefficient outside the default limits or the range specified by the manufacturer
FAIL
Occurrences: 5
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 4
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 4
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 4