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1971 Porsche 911 — MOT History by Age

How cars manufactured in 1971 perform at MOT as they age

55 years
Current Age
90.9%
Latest Pass Rate
1,667
Total Tests (All Years)
59,275 mi
Avg Mileage (Latest)

Data from official DVSA MOT testing records

Insufficient data for same-age comparison.

How This Car Ages

Pass rate progression for the 1971 Porsche 911 as it ages.

38 yrs71.9%
39 yrs72.4%
40 yrs71.0%
41 yrs72.5%
42 yrs76.4%
43 yrs69.6%
44 yrs74.1%
45 yrs77.2%
46 yrs77.8%
47 yrs83.1%
48 yrs87.5%
49 yrs90.9%

Bar chart showing pass rate by car age from 38 to 49 years

Fail Rate %
📊 View as table
AgePass RateTests
38 yrs71.9%178
39 yrs72.4%163
40 yrs71.0%162
41 yrs72.5%153
42 yrs76.4%161
43 yrs69.6%161
44 yrs74.1%166
45 yrs77.2%171
46 yrs77.8%167
47 yrs83.1%77
48 yrs87.5%64
49 yrs90.9%44

Pass Rate Trend

How the 1971 Porsche 911 pass rate changes as it ages, from first MOT to most recent.

Trend shows improving over 12 years

Pass Rate %
📊 View as table
BuiltPass RateTests
2020 (49 yrs)90.9%44
2019 (48 yrs)87.5%64
2018 (47 yrs)83.1%77
2017 (46 yrs)77.8%167
2016 (45 yrs)77.2%171
2015 (44 yrs)74.1%166
2014 (43 yrs)69.6%161
2013 (42 yrs)76.4%161
2012 (41 yrs)72.5%153
2011 (40 yrs)71%162
2010 (39 yrs)72.4%163
2009 (38 yrs)71.9%178

Year-by-Year MOT Results

2009
71.9%
Age (yrs) 38Tests 178Avg Mileage 51,544Top Failure Lamps, Reflectors and Electrical Equipment — 20.2%
2010
72.4%
Age (yrs) 39Tests 163Avg Mileage 53,639Top Failure Lamps, Reflectors and Electrical Equipment — 20.9%
2011
71.0%
Age (yrs) 40Tests 162Avg Mileage 51,674Top Failure Lamps, Reflectors and Electrical Equipment — 16.7%
2012
72.5%
Age (yrs) 41Tests 153Avg Mileage 47,616Top Failure Lamps, Reflectors and Electrical Equipment — 13.1%
2013
76.4%
Age (yrs) 42Tests 161Avg Mileage 51,873Top Failure Lamps, Reflectors and Electrical Equipment — 40.4%
2014
69.6%
Age (yrs) 43Tests 161Avg Mileage 53,963Top Failure Lamps, Reflectors and Electrical Equipment — 51.6%
2015
74.1%
Age (yrs) 44Tests 166Avg Mileage 52,946Top Failure Lamps, Reflectors and Electrical Equipment — 34.9%
2016
77.2%
Age (yrs) 45Tests 171Avg Mileage 50,906Top Failure Lamps, Reflectors and Electrical Equipment — 33.3%
2017
77.8%
Age (yrs) 46Tests 167Avg Mileage 49,454Top Failure Lamps, Reflectors and Electrical Equipment — 30.5%
2018
83.1%
Age (yrs) 47Tests 77Avg Mileage 52,430Top Failure Brakes — 13.0%
2019
87.5%
Age (yrs) 48Tests 64Avg Mileage 58,148Top Failure Brakes — 12.5%
2020
90.9%
Age (yrs) 49Tests 44Avg Mileage 59,275Top Failure Body, chassis, structure — 6.8%

Common MOT Failures

Top failure categories across all test years for 1971 Porsche 911, with age trends.

Lamps, Reflectors and Electrical Equipment
29.1%
↑ Increases with age
Suspension
15.2%
↓ Decreases with age
Brakes
13.5%
— Consistent
Visibility
10.4%
— Consistent
Driver's View of the Road
8.1%
— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

CategoryAt YoungestAt OldestChangeTrend
Suspension12.9% (38 yrs)4.5% (49 yrs)
-8.4%
🟢 ↓

Other Manufacture Years

1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 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
← Back to Porsche 911 overview

Looking for the best year to buy? See the full comparison on the Porsche 911 page →

About This Data

This page shows how Porsche 911 cars manufactured in 1971 perform at MOT as they age. Data spans from 2009 to 2020, covering 1,667 tests. Pass rates naturally decline with age as components wear.

Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.

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