Skip to main content

Porsche 911 - 2003

141.7 faults per 100 tests
Year average for all cars of 2003 is 380.4 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Porsche 911, model year 2003. Sample size: 3,145 cars, 6,784 tests and 9,611 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 3,145 cars

The 2003 Porsche 911 has an overall defect rate of 142 per 100 vehicles, significantly lower than the yearly average of 378 per 100, representing a 63% improvement. This model shows particularly strong performance in categories such as brakes, steering, and visibility, with defect rates much better than average. Notably, as mileage increases, defect rates also rise, but the Porsche maintains a better-than-average standing across all mileage segments. While tyre wear is a common concern, the 911 excels in several other areas, demonstrating its reliability compared to typical vehicles of the same year.

Cars by mileage segment

Total: 3,145 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
▲ 47.6% better
88.7 faults / 100 tests
Year avg: 169.3 / 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
▲ 76.6% better
5.9 faults / 100 tests
Year avg: 25.2 / 100 tests
  • Power steering pipe, hose or wiring: excessively damaged or corroded
  • Steering rack gaiter or ball joint dust cover: damaged or deteriorated
  • A steering ball joint: with excessive wear or free play
  • Free play in the steering, measured at the rim of the steering wheel is: excessive
  • Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
Visibility
▲ 64.4% better
10.6 faults / 100 tests
Year avg: 29.8 / 100 tests
  • 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
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 55.7% better
45.5 faults / 100 tests
Year avg: 102.8 / 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
  • Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
  • 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
  • Headlamp reflector or lens: slightly defective
Wheels & Suspension
▲ 68.8% better
94.3 faults / 100 tests
Year avg: 302.1 / 100 tests
  • 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 component: excessively damaged or corroded
  • A suspension pin, bush, joint or bearing: excessively worn
  • A spring: or spring component fractured or seriously weakened
Body/Structure
▲ 74.5% better
16.6 faults / 100 tests
Year avg: 65.2 / 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
▲ 80.1% better
2.7 faults / 100 tests
Year avg: 13.6 / 100 tests
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • A seat belt: or flexible stalk damaged
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • Audible warning:
  • A seat belt: webbing or flexible stalk significantly stretched or weakened
Other
▲ 64.1% better
18.9 faults / 100 tests
Year avg: 52.7 / 100 tests
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • 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
  • Engine MIL inoperative or indicating a malfunction
  • Exhaust noise levels in excess of those permitted

Fault rate by mileage segment

Model    Year average
0 538 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: 1,479
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 1,001
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 863
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 584
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 556
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 374
Exhaust system has a major leak or is insecure
ADVISORY
Occurrences: 245
Lamp emitted colour, position or intensity not in accordance with the requirements
ADVISORY
Occurrences: 198
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 172
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 166

Serious faults (Top 10)

Brake pipe damaged or excessively corroded
FAIL
Occurrences: 148
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 138
Lambda coefficient outside the default limits or the range specified by the manufacturer
FAIL
Occurrences: 135
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 103
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 90
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 76
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 71
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 70
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 65
Beam image obviously incorrect
FAIL
Occurrences: 60