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Porsche 911 - 1998

164.6 faults per 100 tests
Year average for all cars of 1998 is 342.9 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Porsche 911, model year 1998. Sample size: 1,201 cars, 2,465 tests and 4,058 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 1,201 cars

The 1998 Porsche 911 has an overall defect rate of 165 defects per 100 vehicles, significantly lower than the yearly average of 339 defects per 100 vehicles, indicating a 52% improvement. Notably, the model performs exceptionally well in categories such as brakes and steering, where it shows a much lower incidence of defects compared to the average. However, as mileage increases, the defect rate also rises for this model, peaking at 403 defects per 100 vehicles for those over 124,000 miles. Overall, the Porsche 911 stands out positively in multiple categories, making it a reliable choice compared to other cars of the same year.

Cars by mileage segment

Total: 1,201 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
▲ 33.6% better
99.2 faults / 100 tests
Year avg: 149.4 / 100 tests
  • Brake pipe damaged or excessively corroded
  • Brake pipe damaged or excessively corroded
  • Parking brake efficiency: below minimum requirement
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
Steering
▲ 75.8% better
6.2 faults / 100 tests
Year avg: 25.6 / 100 tests
  • A steering ball joint: with excessive wear or free play
  • A steering ball joint: with excessive wear or free play
  • Steering rack gaiter or ball joint dust cover: damaged or deteriorated
  • Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
  • Power steering pipe, hose or wiring: excessively damaged or corroded
Visibility
▲ 41.1% better
15.5 faults / 100 tests
Year avg: 26.3 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: missing or obviously not clearing the windscreen
  • Wiper not operating or missing
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Wiper blade: defective
Lights & Electrics
▲ 38.1% better
41.3 faults / 100 tests
Year avg: 66.7 / 100 tests
  • A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
  • Lamp emitted colour, position or intensity not in accordance with 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
  • Headlamp reflector or lens: slightly defective
  • The aim of a headlamp is not within limits laid down in the requirements
Wheels & Suspension
▲ 56.2% better
112.9 faults / 100 tests
Year avg: 257.8 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • A shock absorber damaged … or showing signs of severe leakage
  • A suspension pin, bush, joint or bearing: excessively worn
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A suspension component: excessively damaged or corroded
Body/Structure
▲ 82.6% better
14.0 faults / 100 tests
Year avg: 80.5 / 100 tests
  • 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
  • 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: severely deteriorated
Equipment
▲ 57.8% better
8.6 faults / 100 tests
Year avg: 20.4 / 100 tests
  • A seat belt: or flexible stalk damaged
  • Audible warning:
  • 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
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
Other
▲ 46.8% better
31.4 faults / 100 tests
Year avg: 59.0 / 100 tests
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
  • Emissions levels exceed default limits
  • Emissions test unable to be completed
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • Emissions levels exceed the manufacturer’s specified limits

Fault rate by mileage segment

Model    Year average
0 543 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)

Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 523
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 386
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 323
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 320
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 257
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 198
A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
MINOR
Occurrences: 90
Exhaust system has a major leak or is insecure
ADVISORY
Occurrences: 81
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 80
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 79

Serious faults (Top 10)

A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 56
Lambda coefficient outside the default limits or the range specified by the manufacturer
FAIL
Occurrences: 53
Brake pipe damaged or excessively corroded
FAIL
Occurrences: 48
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 41
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 36
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 36
Audible warning:
FAIL
Occurrences: 31
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 28
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 24
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: 22