1971 Triumph Stag — MOT History by Age

How cars manufactured in 1971 perform at MOT as they age

55 years

Current Age

85.4%

Latest Pass Rate

12,051

Total Tests (All Years)

47,260 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Best vintage for Stag

Insufficient data for same-age comparison.

How This Car Ages

Pass rate progression for the 1971 Triumph Stag as it ages.

38 yrs69.1%

→ ↑1.3%

39 yrs70.4%

→ ↓1.8%

40 yrs68.6%

→ ↓0.7%

41 yrs67.9%

→ ↑2.1%

42 yrs70.0%

→ ↑2.5%

43 yrs72.5%

→ ↑1.5%

44 yrs74.0%

→ ↓0.8%

45 yrs73.2%

→ ↑2.7%

46 yrs75.9%

→ ↑1.5%

47 yrs77.4%

→ ↑0.9%

48 yrs78.3%

→ ↓0.4%

49 yrs77.9%

→ ↓1.6%

50 yrs76.3%

→ ↓2.6%

51 yrs73.7%

→ ↓1.5%

52 yrs72.2%

→ ↑13.2%

53 yrs85.4%

📊 View as table

Age	Pass Rate	Tests
38 yrs	69.1%	1,159
39 yrs	70.4%	1,176
40 yrs	68.6%	1,202
41 yrs	67.9%	1,141
42 yrs	70.0%	1,191
43 yrs	72.5%	1,169
44 yrs	74.0%	1,202
45 yrs	73.2%	1,213
46 yrs	75.9%	1,167
47 yrs	77.4%	518
48 yrs	78.3%	346
49 yrs	77.9%	249
50 yrs	76.3%	93
51 yrs	73.7%	57
52 yrs	72.2%	79
53 yrs	85.4%	89

Pass Rate Trend

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

📊 View as table

Built	Pass Rate	Tests
2024 (53 yrs)	85.4%	89
2023 (52 yrs)	72.2%	79
2022 (51 yrs)	73.7%	57
2021 (50 yrs)	76.3%	93
2020 (49 yrs)	77.9%	249
2019 (48 yrs)	78.3%	346
2018 (47 yrs)	77.4%	518
2017 (46 yrs)	75.9%	1,167
2016 (45 yrs)	73.2%	1,213
2015 (44 yrs)	74%	1,202
2014 (43 yrs)	72.5%	1,169
2013 (42 yrs)	70%	1,191
2012 (41 yrs)	67.9%	1,141
2011 (40 yrs)	68.6%	1,202
2010 (39 yrs)	70.4%	1,176
2009 (38 yrs)	69.1%	1,159

Year-by-Year MOT Results

2009

69.1%

Age (yrs) 38Tests 1,159Avg Mileage 51,661Top Failure Lamps, Reflectors and Electrical Equipment — 17.2%

2010

70.4%

Age (yrs) 39Tests 1,176Avg Mileage 50,473Top Failure Lamps, Reflectors and Electrical Equipment — 16.8%

2011

68.6%

Age (yrs) 40Tests 1,202Avg Mileage 51,952Top Failure Lamps, Reflectors and Electrical Equipment — 16.7%

2012

67.9%

Age (yrs) 41Tests 1,141Avg Mileage 51,202Top Failure Suspension — 18.6%

2013

70.0%

Age (yrs) 42Tests 1,191Avg Mileage 50,359Top Failure Suspension — 36.8%

2014

72.5%

Age (yrs) 43Tests 1,169Avg Mileage 50,329Top Failure Lamps, Reflectors and Electrical Equipment — 31.2%

2015

74.0%

Age (yrs) 44Tests 1,202Avg Mileage 50,580Top Failure Lamps, Reflectors and Electrical Equipment — 32.2%

2016

73.2%

Age (yrs) 45Tests 1,213Avg Mileage 50,871Top Failure Lamps, Reflectors and Electrical Equipment — 27.5%

2017

75.9%

Age (yrs) 46Tests 1,167Avg Mileage 51,791Top Failure Suspension — 28.0%

2018

77.4%

Age (yrs) 47Tests 518Avg Mileage 51,073Top Failure Suspension — 19.5%

2019

78.3%

Age (yrs) 48Tests 346Avg Mileage 49,574Top Failure Suspension — 23.1%

2020

77.9%

Age (yrs) 49Tests 249Avg Mileage 50,849Top Failure Lamps, reflectors and electrical equipment — 26.1%

2021

76.3%

Age (yrs) 50Tests 93Avg Mileage 54,122Top Failure Lamps, reflectors and electrical equipment — 25.8%

2022

73.7%

Age (yrs) 51Tests 57Avg Mileage 52,675Top Failure Suspension — 19.3%

2023

72.2%

Age (yrs) 52Tests 79Avg Mileage 49,089Top Failure Lamps, reflectors and electrical equipment — 29.1%

2024

85.4%

Age (yrs) 53Tests 89Avg Mileage 47,260Top Failure Steering — 14.6%

MOT results for 1971 Triumph Stag by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	38	69.1%	1,159	51,661	Lamps, Reflectors and Electrical Equipment — 17.2%
2010	39	70.4%	1,176	50,473	Lamps, Reflectors and Electrical Equipment — 16.8%
2011	40	68.6%	1,202	51,952	Lamps, Reflectors and Electrical Equipment — 16.7%
2012	41	67.9%	1,141	51,202	Suspension — 18.6%
2013	42	70.0%	1,191	50,359	Suspension — 36.8%
2014	43	72.5%	1,169	50,329	Lamps, Reflectors and Electrical Equipment — 31.2%
2015	44	74.0%	1,202	50,580	Lamps, Reflectors and Electrical Equipment — 32.2%
2016	45	73.2%	1,213	50,871	Lamps, Reflectors and Electrical Equipment — 27.5%
2017	46	75.9%	1,167	51,791	Suspension — 28.0%
2018	47	77.4%	518	51,073	Suspension — 19.5%
2019	48	78.3%	346	49,574	Suspension — 23.1%
2020	49	77.9%	249	50,849	Lamps, reflectors and electrical equipment — 26.1%
2021	50	76.3%	93	54,122	Lamps, reflectors and electrical equipment — 25.8%
2022	51	73.7%	57	52,675	Suspension — 19.3%
2023	52	72.2%	79	49,089	Lamps, reflectors and electrical equipment — 29.1%
2024	53	85.4%	89	47,260	Steering — 14.6%

Common MOT Failures

Top failure categories across all test years for 1971 Triumph Stag, with age trends.

Lamps, Reflectors and Electrical Equipment

23.0%

↓ Decreases with age

Suspension

22.2%

↑ Increases with age

Lamps, reflectors and electrical equipment

20.3%

↓ Decreases with age

Brakes

17.2%

↓ Decreases with age

Steering

12.5%

↑ 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
Brakes	14.0% (38 yrs)	9.0% (53 yrs)	-5.0%	🟢 ↓
Steering	9.6% (38 yrs)	14.6% (53 yrs)	+5.0%	🔴 ↑

Other Manufacture Years

1970 1971 1972 1973 1974 1975 1976 1977 1978

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Looking for the best year to buy? See the full comparison on the Triumph Stag page →

About This Data

This page shows how Triumph Stag cars manufactured in 1971 perform at MOT as they age. Data spans from 2009 to 2024, covering 12,051 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.