Porsche 944 - 1991
152.2 faults per 100 tests
Year average for all cars of 1991 is 263.4 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Porsche 944, model year 1991.
Sample size: 326 cars, 609 tests and 927 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: 326 cars
The 1991 Porsche 944 has an overall defect rate of 152 per 100 vehicles, significantly lower than the average of 263 per 100 for cars of the same year, representing a 42% reduction in defects. Notably, the 944 performs exceptionally well in categories such as brakes, steering, and visibility, with defect rates considerably below the average. Mileage-related trends show an increase in defects as mileage rises, particularly in the 31,000 to 62,000 miles range. Overall, the model stands out positively in several key areas, indicating a robust build quality compared to its peers.
Cars by mileage segment
Total: 326 cars
More model years for Porsche 944
Other models from Porsche
Categories
Brakes
▲ 20.4% better
83.7 faults / 100 tests
Year avg: 105.2 / 100 tests
- Brake pipe damaged or excessively corroded
- Brake hose ferrules: excessively corroded
- Parking brake efficiency: below minimum requirement
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Excessive fluctuation in brake effort through each wheel revolution
Steering
▲ 79.7% better
5.9 faults / 100 tests
Year avg: 29.0 / 100 tests
- Excessive wear or play in a universal joint or a flexible coupling excessively deteriorated
- A steering linkage component with: relative movement between components which should be fixed
- Power steering fluid leaking or system malfunctioning
- Power steering fluid leaking or system malfunctioning
- Steering linkage retaining or locking device missing or ineffective
Visibility
▲ 27.4% better
15.4 faults / 100 tests
Year avg: 21.2 / 100 tests
- 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 or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 30.4% better
41.4 faults / 100 tests
Year avg: 59.5 / 100 tests
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
- A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
- 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
- An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
Wheels & Suspension
▲ 42.7% better
101.1 faults / 100 tests
Year avg: 176.5 / 100 tests
- A wheel bearing: with excessive play
- Tyre tread depth not in accordance with the requirements
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A suspension pin, bush, joint or bearing: excessively worn
- The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
Body/Structure
▲ 55.4% better
28.6 faults / 100 tests
Year avg: 64.1 / 100 tests
- Exhaust system has a major leak or is insecure
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
- Body, cab or chassis: excessively corroded at mounting points
Equipment
▲ 78.8% better
3.9 faults / 100 tests
Year avg: 18.4 / 100 tests
- Audible warning:
- 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
- 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
24.3 faults / 100 tests
Year avg: 52.9 / 100 tests
- Emissions levels exceed default limits
- Emissions test unable to be completed
- 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
- 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)
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 79
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 69
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 54
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 50
A wheel bearing: with excessive play
ADVISORY
Occurrences: 46
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 46
Brake hose ferrules: excessively corroded
ADVISORY
Occurrences: 41
Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
ADVISORY
Occurrences: 39
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 33
The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
ADVISORY
Occurrences: 24
Serious faults (Top 10)
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 22
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 18
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 15
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 12
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 12
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 11
The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
FAIL
Occurrences: 10
An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 8
Service brake efficiency: below minimum requirement
FAIL
Occurrences: 7
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 7