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Porsche 911 - 2015

36.8 faults per 100 tests
Year average for all cars of 2015 is 174.5 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Porsche 911, model year 2015. Sample size: 2,406 cars, 6,033 tests and 2,220 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 2,406 cars

The 2015 Porsche 911 shows a significantly lower overall defect rate compared to the average car from the same year, with 37 defects per 100 vehicles, which is 78% better than the average of 170 defects. Notably, this model excels in several categories, particularly in brakes, steering, and visibility, with defect rates far below the average. Mileage-related trends indicate that defect rates increase with mileage, peaking in the 124,000+ miles category, although the Porsche still maintains a better performance overall. Overall, the 911 stands out for its reliability, particularly in critical areas such as brakes and steering, making it a solid choice for those seeking a dependable vehicle.

Cars by mileage segment

Total: 2,406 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
▲ 81.6% better
15.6 faults / 100 tests
Year avg: 84.7 / 100 tests
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake lining or pad: worn below 1.5mm
  • Excessive fluctuation in brake effort through each wheel revolution
  • Brake pipe damaged or excessively corroded
  • Brake disc or drum: significantly and obviously worn
Steering
▲ 99.0% better
0.1 faults / 100 tests
Year avg: 9.9 / 100 tests
  • Track rod or drag link ends seriously misaligned
Visibility
▲ 78.3% better
3.5 faults / 100 tests
Year avg: 16.1 / 100 tests
  • Windscreen washers not working or not providing sufficient fluid to clear 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
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 89.4% better
3.3 faults / 100 tests
Year avg: 31.0 / 100 tests
  • 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
  • Headlamp cleaning device: inoperative in the case of LED or gas discharge systems (HID)
  • A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
  • The aim of a headlamp is not within limits laid down in the requirements
Wheels & Suspension
▲ 73.7% better
46.9 faults / 100 tests
Year avg: 178.3 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
  • A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A suspension pin, bush, joint or bearing: excessively worn
Body/Structure
▲ 86.3% better
1.6 faults / 100 tests
Year avg: 11.7 / 100 tests
  • 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
  • A transmission shaft constant velocity joint boot: severely deteriorated
  • Exhaust system has a major leak or is insecure
  • A door will not open using the relevant control or close properly
Equipment
▲ 90.0% better
0.4 faults / 100 tests
Year avg: 4.0 / 100 tests
  • A seat belt: webbing or flexible stalk significantly stretched or weakened
  • A seat belt: or flexible stalk damaged
  • A seat belt:
  • ESC MIL indicates a system malfunction
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
Other
▲ 84.1% better
2.1 faults / 100 tests
Year avg: 13.2 / 100 tests
  • 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
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
  • Emissions levels exceed default limits
  • Exhaust noise levels in excess of those permitted

Fault rate by mileage segment

Model    Year average
0 342 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)

Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 661
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 404
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 149
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 116
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 89
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 75
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 65
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 53
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 45
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 41

Serious faults (Top 10)

A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 41
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 40
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 33
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 24
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 22
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 15
A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
FAIL
Occurrences: 13
A wheel: with a loose or missing wheel nut, bolt or stud
FAIL
Occurrences: 12
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 9
Lambda coefficient outside the default limits or the range specified by the manufacturer
FAIL
Occurrences: 9