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Porsche 911 - 1986

78.8 faults per 100 tests
Year average for all cars of 1986 is 241.8 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Porsche 911, model year 1986. Sample size: 403 cars, 739 tests and 582 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 403 cars

The 1986 Porsche 911 displays a significantly lower overall defect rate of 79 per 100 vehicles compared to the average of 240 per 100, marking a 67% improvement. This model excels particularly in categories such as brakes, steering, and body structure, with defect rates well below the average, indicating strong reliability in these areas. Mileage trends reveal that defects remain relatively consistent across various mileage brackets, with higher mileage segments showing slightly increased rates. Overall, the Porsche 911 stands out as a notably dependable classic car, outperforming many of its contemporaries in key safety and structural categories.

Cars by mileage segment

Total: 403 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
▲ 71.8% better
24.9 faults / 100 tests
Year avg: 88.2 / 100 tests
  • Significant brake effort recorded with no brake applied indicating a binding brake
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
  • Brake hose ferrules: excessively corroded
  • Significant brake effort recorded with no brake applied indicating a binding brake
Steering
▲ 87.3% better
3.8 faults / 100 tests
Year avg: 30.0 / 100 tests
  • A steering ball joint: with excessive wear or free play
  • Excessive movement of centre of steering wheel up or down
  • Excessive radial movement between the top of the steering column and the shaft indicating an excessively worn top bearing
  • Excessive radial movement between the top of the steering column and the shaft indicating an excessively worn top bearing
  • Relative movement between steering wheel and column: such that there is a serious risk of detachment
Visibility
▲ 35.3% better
14.1 faults / 100 tests
Year avg: 21.8 / 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
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • An obstruction: materially affecting the driver’s view of the road through the swept area of the windscreen or an obligatory external mirror not visible
Lights & Electrics
▲ 37.5% better
37.6 faults / 100 tests
Year avg: 60.2 / 100 tests
  • Beam image obviously incorrect
  • 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 rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
  • A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
Wheels & Suspension
▲ 69.4% better
48.2 faults / 100 tests
Year avg: 157.4 / 100 tests
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A wheel bearing: with excessive play
  • A shock absorber damaged … or showing signs of severe leakage
  • Tyre tread depth not in accordance with the requirements
  • A suspension pin, bush, joint or bearing: excessively worn
Body/Structure
▲ 84.6% better
8.4 faults / 100 tests
Year avg: 54.7 / 100 tests
  • A transmission shaft constant velocity joint boot: severely deteriorated
  • Exhaust system has a major leak or is insecure
  • 6.1.1 (d) (i)
  • 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
Equipment
▲ 81.1% better
3.2 faults / 100 tests
Year avg: 16.9 / 100 tests
  • A statutory seat belt missing
  • 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
  • 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
  • Audible warning:
  • Seat belt not functioning as intended or of an incorrect type
Other
▲ 68.0% better
17.3 faults / 100 tests
Year avg: 54.1 / 100 tests
  • Emissions levels exceed default limits
  • Emissions levels exceed default limits
  • 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
  • Exhaust emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users

Fault rate by mileage segment

Model    Year average
0 464 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)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 48
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 46
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 37
A wheel bearing: with excessive play
ADVISORY
Occurrences: 32
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 26
Significant brake effort recorded with no brake applied indicating a binding brake
ADVISORY
Occurrences: 21
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: 20
Brake hose ferrules: excessively corroded
ADVISORY
Occurrences: 20
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 20
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: 19

Serious faults (Top 10)

Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 26
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: 20
Beam image obviously incorrect
FAIL
Occurrences: 19
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 16
Emissions levels exceed default limits
FAIL
Occurrences: 14
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 9
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 9
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 7
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 5
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 4