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1975 Porsche 911 — MOT History by Age

How cars manufactured in 1975 perform at MOT as they age

51 years
Current Age
97.7%
Latest Pass Rate
644
Total Tests (All Years)
53,611 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 1975 Porsche 911 as it ages.

34 yrs66.7%
35 yrs64.5%
36 yrs77.6%
37 yrs81.4%
38 yrs72.7%
39 yrs74.6%
40 yrs73.0%
41 yrs78.9%
42 yrs81.9%
43 yrs81.1%
49 yrs97.7%

Bar chart showing pass rate by car age from 34 to 49 years

Fail Rate %
📊 View as table
AgePass RateTests
34 yrs66.7%57
35 yrs64.5%62
36 yrs77.6%58
37 yrs81.4%59
38 yrs72.7%55
39 yrs74.6%67
40 yrs73.0%63
41 yrs78.9%71
42 yrs81.9%72
43 yrs81.1%37
49 yrs97.7%43

Pass Rate Trend

How the 1975 Porsche 911 pass rate changes as it ages, from first MOT to most recent.

Trend shows improving over 11 years

Pass Rate %
📊 View as table
BuiltPass RateTests
2024 (49 yrs)97.7%43
2018 (43 yrs)81.1%37
2017 (42 yrs)81.9%72
2016 (41 yrs)78.9%71
2015 (40 yrs)73%63
2014 (39 yrs)74.6%67
2013 (38 yrs)72.7%55
2012 (37 yrs)81.4%59
2011 (36 yrs)77.6%58
2010 (35 yrs)64.5%62
2009 (34 yrs)66.7%57

Year-by-Year MOT Results

2009
66.7%
Age (yrs) 34Tests 57Avg Mileage 57,880Top Failure Brakes — 21.1%
2010High Fail Rate
64.5%
Age (yrs) 35Tests 62Avg Mileage 56,759Top Failure Lamps, Reflectors and Electrical Equipment — 24.2%
2011
77.6%
Age (yrs) 36Tests 58Avg Mileage 56,117Top Failure Suspension — 13.8%
2012
81.4%
Age (yrs) 37Tests 59Avg Mileage 66,193Top Failure Brakes — 11.9%
2013
72.7%
Age (yrs) 38Tests 55Avg Mileage 83,120Top Failure Lamps, Reflectors and Electrical Equipment — 54.5%
2014
74.6%
Age (yrs) 39Tests 67Avg Mileage 63,852Top Failure Lamps, Reflectors and Electrical Equipment — 58.2%
2015
73.0%
Age (yrs) 40Tests 63Avg Mileage 65,379Top Failure Lamps, Reflectors and Electrical Equipment — 57.1%
2016
78.9%
Age (yrs) 41Tests 71Avg Mileage 68,929Top Failure Lamps, Reflectors and Electrical Equipment — 42.3%
2017
81.9%
Age (yrs) 42Tests 72Avg Mileage 61,334Top Failure Lamps, Reflectors and Electrical Equipment — 26.4%
2018
81.1%
Age (yrs) 43Tests 37Avg Mileage 66,288Top Failure Lamps, Reflectors and Electrical Equipment — 29.7%
2024
97.7%
Age (yrs) 49Tests 43Avg Mileage 53,611Top Failure Suspension — 4.7%

Common MOT Failures

Top failure categories across all test years for 1975 Porsche 911, with age trends.

Lamps, Reflectors and Electrical Equipment
32.9%
↑ Increases with age
Suspension
19.4%
↓ Decreases with age
Brakes
17.5%
↓ Decreases with age
Body, Structure and General Items
10.1%
— Consistent
Driver's View of the Road
9.6%
↑ Increases with age

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

CategoryAt YoungestAt OldestChangeTrend
Brakes21.1% (34 yrs)2.3% (49 yrs)
-18.8%
🟢 ↓
Suspension15.8% (34 yrs)4.7% (49 yrs)
-11.1%
🟢 ↓

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 1975 perform at MOT as they age. Data spans from 2009 to 2024, covering 644 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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