Skip to main content

Porsche 911 - 1990

80.3 faults per 100 tests
Year average for all cars of 1990 is 257.0 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Porsche 911, model year 1990. Sample size: 808 cars, 1,373 tests and 1,103 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 808 cars

The 1990 Porsche 911 has an overall defect rate of 80 per 100 vehicles, which is significantly lower than the average of 256 defects per 100 cars for the same year, showing a remarkable 69% improvement. This model performs exceptionally well in several key areas, particularly in brakes and steering, where it has a defect rate that is 76% and 79% lower than the average, respectively. Additionally, the 911 demonstrates strong performance in visibility and lights & electrics, with defect rates well below the average. Mileage-related trends indicate that, while defect rates increase with mileage, this model consistently remains below average across all mileage segments. Overall, the Porsche 911 stands out as a reliable choice compared to its peers from the same year.

Cars by mileage segment

Total: 808 cars

More model years for Porsche 911

1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022

Other models from Porsche

Porsche 718 CAYMAN GT4 Porsche 718 SPYDER Porsche 911 Porsche 924 Porsche 928 Porsche 944 Porsche 968 Porsche BOXSTER Porsche CARRERA Porsche CAYENNE Porsche MACAN Porsche PANAMERA Porsche TAYCAN

Categories

Brakes
▲ 76.2% better
24.2 faults / 100 tests
Year avg: 101.8 / 100 tests
  • Brake hose ferrules: excessively corroded
  • Brake lining or pad: worn below 1.5mm
  • Brake pipe damaged or excessively corroded
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Excessive fluctuation in brake effort through each wheel revolution
Steering
▲ 79.7% better
5.2 faults / 100 tests
Year avg: 25.6 / 100 tests
  • Steering rack gaiter or ball joint dust cover: damaged or deteriorated
  • A steering ball joint: with excessive wear or free play
  • Power steering pipe, hose or wiring: excessively damaged or corroded
  • Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
  • Power steering fluid leaking or system malfunctioning
Visibility
▲ 44.3% better
11.8 faults / 100 tests
Year avg: 21.2 / 100 tests
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Windscreen or window excessively tinted: but not adversely affecting driver’s view
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: defective
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 44.1% better
32.8 faults / 100 tests
Year avg: 58.7 / 100 tests
  • The aim of a headlamp is not within limits laid down in the requirements
  • 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
  • A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
  • Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
  • Beam image obviously incorrect
Wheels & Suspension
▲ 74.8% better
44.6 faults / 100 tests
Year avg: 177.0 / 100 tests
  • A suspension pin, bush, joint or bearing: excessively worn
  • A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
  • Tyre tread depth not in accordance with the requirements
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A spring: or spring component fractured or seriously weakened
Body/Structure
▲ 89.7% better
6.4 faults / 100 tests
Year avg: 62.3 / 100 tests
  • A transmission shaft constant velocity joint boot: severely deteriorated
  • Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
  • Body, cab or chassis: excessively corroded at mounting points
  • 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
Equipment
▲ 87.3% better
2.0 faults / 100 tests
Year avg: 15.7 / 100 tests
  • Audible warning:
  • A seat belt: webbing or flexible stalk significantly stretched or weakened
  • 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
  • A statutory seat belt missing
  • Audible warning:
Other
▲ 35.0% better
33.6 faults / 100 tests
Year avg: 51.7 / 100 tests
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
  • Exhaust noise levels in excess of those permitted
  • Emissions levels exceed default limits
  • Emissions test unable to be completed

Fault rate by mileage segment

Model    Year average
0 471 0–31,000 mi 31,000–62,000 62,000–93,000 93,000–124,000 124,000+
* Metric: faults per 100 tests.

Most common faults (Top 10)

Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 209
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 87
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 49
Brake hose ferrules: excessively corroded
ADVISORY
Occurrences: 44
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 43
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 41
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 38
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 30
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 29
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 26

Serious faults (Top 10)

The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 41
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 29
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 26
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 18
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: 18
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 16
Beam image obviously incorrect
FAIL
Occurrences: 15
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 12
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 12
Emissions levels exceed default limits
FAIL
Occurrences: 11