1977 Porsche 911 — MOT History by Age

How cars manufactured in 1977 perform at MOT as they age

49 years

Current Age

90.3%

Latest Pass Rate

1,438

Total Tests (All Years)

106,311 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 1977 Porsche 911 as it ages.

32 yrs68.1%

→ ↓4.8%

33 yrs63.3%

→ ↑5.7%

34 yrs69.0%

→ ↓4.8%

35 yrs64.2%

→ ↑8.3%

36 yrs72.5%

→ ↓11.1%

37 yrs61.4%

→ ↑10.3%

38 yrs71.7%

→ ↓2.4%

39 yrs69.3%

→ ↓1.2%

40 yrs68.1%

→ ↑12.6%

41 yrs80.7%

→ ↓1.5%

42 yrs79.2%

→ ↑2.6%

43 yrs81.8%

→ ↑8.5%

44 yrs90.3%

📊 View as table

Age	Pass Rate	Tests
32 yrs	68.1%	135
33 yrs	63.3%	139
34 yrs	69.0%	126
35 yrs	64.2%	134
36 yrs	72.5%	131
37 yrs	61.4%	145
38 yrs	71.7%	152
39 yrs	69.3%	150
40 yrs	68.1%	141
41 yrs	80.7%	57
42 yrs	79.2%	53
43 yrs	81.8%	44
44 yrs	90.3%	31

Pass Rate Trend

How the 1977 Porsche 911 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2021 (44 yrs)	90.3%	31
2020 (43 yrs)	81.8%	44
2019 (42 yrs)	79.2%	53
2018 (41 yrs)	80.7%	57
2017 (40 yrs)	68.1%	141
2016 (39 yrs)	69.3%	150
2015 (38 yrs)	71.7%	152
2014 (37 yrs)	61.4%	145
2013 (36 yrs)	72.5%	131
2012 (35 yrs)	64.2%	134
2011 (34 yrs)	69%	126
2010 (33 yrs)	63.3%	139
2009 (32 yrs)	68.1%	135

Year-by-Year MOT Results

2009

68.1%

Age (yrs) 32Tests 135Avg Mileage 111,701Top Failure Lamps, Reflectors and Electrical Equipment — 20.0%

2010High Fail Rate

63.3%

Age (yrs) 33Tests 139Avg Mileage 107,143Top Failure Lamps, Reflectors and Electrical Equipment — 24.5%

2011

69.0%

Age (yrs) 34Tests 126Avg Mileage 109,844Top Failure Lamps, Reflectors and Electrical Equipment — 17.5%

2012High Fail Rate

64.2%

Age (yrs) 35Tests 134Avg Mileage 113,376Top Failure Lamps, Reflectors and Electrical Equipment — 22.4%

2013

72.5%

Age (yrs) 36Tests 131Avg Mileage 107,955Top Failure Brakes — 42.7%

2014High Fail Rate

61.4%

Age (yrs) 37Tests 145Avg Mileage 107,723Top Failure Lamps, Reflectors and Electrical Equipment — 54.5%

2015

71.7%

Age (yrs) 38Tests 152Avg Mileage 106,976Top Failure Lamps, Reflectors and Electrical Equipment — 39.5%

2016

69.3%

Age (yrs) 39Tests 150Avg Mileage 106,924Top Failure Lamps, Reflectors and Electrical Equipment — 47.3%

2017

68.1%

Age (yrs) 40Tests 141Avg Mileage 103,451Top Failure Lamps, Reflectors and Electrical Equipment — 48.2%

2018

80.7%

Age (yrs) 41Tests 57Avg Mileage 109,896Top Failure Lamps, Reflectors and Electrical Equipment — 24.6%

2019

79.2%

Age (yrs) 42Tests 53Avg Mileage 91,313Top Failure Lamps, reflectors and electrical equipment — 24.5%

2020

81.8%

Age (yrs) 43Tests 44Avg Mileage 101,610Top Failure Brakes — 20.5%

2021

90.3%

Age (yrs) 44Tests 31Avg Mileage 106,311Top Failure Lamps, reflectors and electrical equipment — 32.3%

MOT results for 1977 Porsche 911 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	32	68.1%	135	111,701	Lamps, Reflectors and Electrical Equipment — 20.0%
2010	33	63.3%	139	107,143	Lamps, Reflectors and Electrical Equipment — 24.5%
2011	34	69.0%	126	109,844	Lamps, Reflectors and Electrical Equipment — 17.5%
2012	35	64.2%	134	113,376	Lamps, Reflectors and Electrical Equipment — 22.4%
2013	36	72.5%	131	107,955	Brakes — 42.7%
2014	37	61.4%	145	107,723	Lamps, Reflectors and Electrical Equipment — 54.5%
2015	38	71.7%	152	106,976	Lamps, Reflectors and Electrical Equipment — 39.5%
2016	39	69.3%	150	106,924	Lamps, Reflectors and Electrical Equipment — 47.3%
2017	40	68.1%	141	103,451	Lamps, Reflectors and Electrical Equipment — 48.2%
2018	41	80.7%	57	109,896	Lamps, Reflectors and Electrical Equipment — 24.6%
2019	42	79.2%	53	91,313	Lamps, reflectors and electrical equipment — 24.5%
2020	43	81.8%	44	101,610	Brakes — 20.5%
2021	44	90.3%	31	106,311	Lamps, reflectors and electrical equipment — 32.3%

Common MOT Failures

Top failure categories across all test years for 1977 Porsche 911, with age trends.

Lamps, Reflectors and Electrical Equipment

33.8%

↑ Increases with age

Suspension

22.2%

↑ Increases with age

Brakes

21.5%

↑ Increases with age

Lamps, reflectors and electrical equipment

18.8%

↑ Increases with age

Driver's View of the Road

12.6%

↑ Increases with age

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Suspension	14.1% (32 yrs)	22.6% (44 yrs)	+8.5%	🔴 ↑
Brakes	13.3% (32 yrs)	19.4% (44 yrs)	+6.1%	🔴 ↑

Other Manufacture Years

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 1977 perform at MOT as they age. Data spans from 2009 to 2021, covering 1,438 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.