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Porsche 911 - 2004

122.5 faults per 100 tests
Year average for all cars of 2004 is 384.6 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Porsche 911, model year 2004. Sample size: 2,975 cars, 6,567 tests and 8,047 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 2,975 cars

The 2004 Porsche 911 has a significantly lower overall defect rate compared to the average car of the same year, with 123 defects per 100 vehicles compared to 382. Notably, it excels in several categories, particularly in brakes, steering, and visibility, where its defect rates are substantially better than the average. However, it does see an increase in defects as mileage increases, particularly in the higher mileage brackets. Overall, this model stands out for its reliability in critical areas, making it a strong performer in comparison to its peers.

Cars by mileage segment

Total: 2,975 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
▲ 50.2% better
81.7 faults / 100 tests
Year avg: 164.2 / 100 tests
  • Brake pipe damaged or excessively corroded
  • Brake pipe damaged or excessively corroded
  • Brake hose ferrules: excessively corroded
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake disc or drum: significantly and obviously worn
Steering
▲ 80.7% better
4.8 faults / 100 tests
Year avg: 24.9 / 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: missing or no longer prevents the ingress of dirt etc.
  • Power steering pipe, hose or wiring: excessively damaged or corroded
  • Power steering fluid leaking or system malfunctioning
Visibility
▲ 69.3% better
9.0 faults / 100 tests
Year avg: 29.3 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: defective
  • Obligatory mirror or device: slightly damaged or loose
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 69.5% better
33.5 faults / 100 tests
Year avg: 109.9 / 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
  • Headlamp reflector or lens: slightly defective
  • The aim of a headlamp is not within limits laid down in the requirements
  • Lamp emitted colour, position or intensity not in accordance with the requirements
  • Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow
Wheels & Suspension
▲ 73.4% better
83.1 faults / 100 tests
Year avg: 312.9 / 100 tests
  • A suspension pin, bush, joint or bearing: excessively worn
  • A suspension component: excessively damaged or corroded
  • Tyre tread depth not in accordance with the requirements
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 79.4% better
13.1 faults / 100 tests
Year avg: 63.6 / 100 tests
  • 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
  • Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
  • A transmission shaft constant velocity joint boot: severely deteriorated
  • Exhaust system has a major leak or is insecure
Equipment
▲ 86.2% better
1.9 faults / 100 tests
Year avg: 13.8 / 100 tests
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • A seat belt: webbing or flexible stalk significantly stretched or weakened
  • A seat belt: or flexible stalk damaged
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • A seat belt:
Other
▲ 65.0% better
17.7 faults / 100 tests
Year avg: 50.5 / 100 tests
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • 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
  • Emissions levels exceed default limits
  • Emissions test unable to be completed

Fault rate by mileage segment

Model    Year average
0 533 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: 1,332
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 859
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 782
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 451
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 436
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 325
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 240
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: 163
Exhaust system has a major leak or is insecure
ADVISORY
Occurrences: 159
Lamp emitted colour, position or intensity not in accordance with the requirements
ADVISORY
Occurrences: 148

Serious faults (Top 10)

Lambda coefficient outside the default limits or the range specified by the manufacturer
FAIL
Occurrences: 136
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 131
Brake pipe damaged or excessively corroded
FAIL
Occurrences: 118
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 91
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 90
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 84
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 50
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 46
Exhaust system has a major leak or is insecure
FAIL
Occurrences: 41
Beam image obviously incorrect
FAIL
Occurrences: 40