1977 Triumph Stag — MOT History by Age

How cars manufactured in 1977 perform at MOT as they age

49 years

Current Age

81.0%

Latest Pass Rate

4,127

Total Tests (All Years)

46,229 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 Triumph Stag as it ages.

32 yrs68.8%

→ ↑1.6%

33 yrs70.4%

→ ↓0.2%

34 yrs70.2%

→ ↓4.5%

35 yrs65.7%

→ ↑3.5%

36 yrs69.2%

→ ↑7.3%

37 yrs76.5%

→ ↓5.4%

38 yrs71.1%

→ ↑4.5%

39 yrs75.6%

→ ↑0.5%

40 yrs76.1%

→ ↓3.3%

41 yrs72.8%

→ ↓1.7%

42 yrs71.1%

→ ↑13.3%

43 yrs84.4%

→ ↓16.9%

44 yrs67.5%

→ ↑10.1%

45 yrs77.6%

→ ↑0.9%

46 yrs78.5%

→ ↑2.5%

47 yrs81.0%

📊 View as table

Age	Pass Rate	Tests
32 yrs	68.8%	365
33 yrs	70.4%	362
34 yrs	70.2%	363
35 yrs	65.7%	362
36 yrs	69.2%	354
37 yrs	76.5%	358
38 yrs	71.1%	381
39 yrs	75.6%	369
40 yrs	76.1%	372
41 yrs	72.8%	162
42 yrs	71.1%	121
43 yrs	84.4%	96
44 yrs	67.5%	120
45 yrs	77.6%	98
46 yrs	78.5%	107
47 yrs	81.0%	137

Pass Rate Trend

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

📊 View as table

Built	Pass Rate	Tests
2024 (47 yrs)	81%	137
2023 (46 yrs)	78.5%	107
2022 (45 yrs)	77.6%	98
2021 (44 yrs)	67.5%	120
2020 (43 yrs)	84.4%	96
2019 (42 yrs)	71.1%	121
2018 (41 yrs)	72.8%	162
2017 (40 yrs)	76.1%	372
2016 (39 yrs)	75.6%	369
2015 (38 yrs)	71.1%	381
2014 (37 yrs)	76.5%	358
2013 (36 yrs)	69.2%	354
2012 (35 yrs)	65.7%	362
2011 (34 yrs)	70.2%	363
2010 (33 yrs)	70.4%	362
2009 (32 yrs)	68.8%	365

Year-by-Year MOT Results

2009

68.8%

Age (yrs) 32Tests 365Avg Mileage 56,906Top Failure Lamps, Reflectors and Electrical Equipment — 18.1%

2010

70.4%

Age (yrs) 33Tests 362Avg Mileage 54,921Top Failure Lamps, Reflectors and Electrical Equipment — 16.3%

2011

70.2%

Age (yrs) 34Tests 363Avg Mileage 55,711Top Failure Lamps, Reflectors and Electrical Equipment — 15.4%

2012

65.7%

Age (yrs) 35Tests 362Avg Mileage 55,646Top Failure Suspension — 20.2%

2013

69.2%

Age (yrs) 36Tests 354Avg Mileage 56,174Top Failure Suspension — 46.3%

2014

76.5%

Age (yrs) 37Tests 358Avg Mileage 56,275Top Failure Lamps, Reflectors and Electrical Equipment — 29.1%

2015

71.1%

Age (yrs) 38Tests 381Avg Mileage 57,671Top Failure Suspension — 46.2%

2016

75.6%

Age (yrs) 39Tests 369Avg Mileage 56,133Top Failure Lamps, Reflectors and Electrical Equipment — 32.2%

2017

76.1%

Age (yrs) 40Tests 372Avg Mileage 57,797Top Failure Lamps, Reflectors and Electrical Equipment — 22.0%

2018

72.8%

Age (yrs) 41Tests 162Avg Mileage 54,248Top Failure Suspension — 31.5%

2019

71.1%

Age (yrs) 42Tests 121Avg Mileage 52,215Top Failure Suspension — 28.9%

2020

84.4%

Age (yrs) 43Tests 96Avg Mileage 56,385Top Failure Suspension — 13.5%

2021

67.5%

Age (yrs) 44Tests 120Avg Mileage 50,545Top Failure Suspension — 34.2%

2022

77.6%

Age (yrs) 45Tests 98Avg Mileage 54,266Top Failure Suspension — 32.7%

2023

78.5%

Age (yrs) 46Tests 107Avg Mileage 53,473Top Failure Suspension — 35.5%

2024

81.0%

Age (yrs) 47Tests 137Avg Mileage 46,229Top Failure Brakes — 15.3%

MOT results for 1977 Triumph Stag by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	32	68.8%	365	56,906	Lamps, Reflectors and Electrical Equipment — 18.1%
2010	33	70.4%	362	54,921	Lamps, Reflectors and Electrical Equipment — 16.3%
2011	34	70.2%	363	55,711	Lamps, Reflectors and Electrical Equipment — 15.4%
2012	35	65.7%	362	55,646	Suspension — 20.2%
2013	36	69.2%	354	56,174	Suspension — 46.3%
2014	37	76.5%	358	56,275	Lamps, Reflectors and Electrical Equipment — 29.1%
2015	38	71.1%	381	57,671	Suspension — 46.2%
2016	39	75.6%	369	56,133	Lamps, Reflectors and Electrical Equipment — 32.2%
2017	40	76.1%	372	57,797	Lamps, Reflectors and Electrical Equipment — 22.0%
2018	41	72.8%	162	54,248	Suspension — 31.5%
2019	42	71.1%	121	52,215	Suspension — 28.9%
2020	43	84.4%	96	56,385	Suspension — 13.5%
2021	44	67.5%	120	50,545	Suspension — 34.2%
2022	45	77.6%	98	54,266	Suspension — 32.7%
2023	46	78.5%	107	53,473	Suspension — 35.5%
2024	47	81.0%	137	46,229	Brakes — 15.3%

Common MOT Failures

Top failure categories across all test years for 1977 Triumph Stag, with age trends.

Suspension

25.9%

↓ Decreases with age

Lamps, Reflectors and Electrical Equipment

23.6%

↑ Increases with age

Brakes

18.3%

— Consistent

Lamps, reflectors and electrical equipment

17.1%

↓ Decreases with age

Noise, emissions and leaks

15.5%

↑ 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	16.2% (32 yrs)	11.7% (47 yrs)	-4.5%	🟢 ↓
Brakes	13.4% (32 yrs)	15.3% (47 yrs)	+1.9%	⚪ —

Other Manufacture Years

1970 1971 1972 1973 1974 1975 1976 1977 1978

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About This Data

This page shows how Triumph Stag cars manufactured in 1977 perform at MOT as they age. Data spans from 2009 to 2024, covering 4,127 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.