1974 Triumph Stag Auto — MOT History by Age

How cars manufactured in 1974 perform at MOT as they age

52 years

Current Age

75.6%

Latest Pass Rate

1,205

Total Tests (All Years)

53,095 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 1974 Triumph Stag Auto as it ages.

35 yrs69.4%

→ ↑0.7%

36 yrs70.1%

→ ↓8.0%

37 yrs62.1%

→ ↑6.2%

38 yrs68.3%

→ ↑1.4%

39 yrs69.7%

→ ↑1.2%

40 yrs70.9%

→ ↑2.6%

41 yrs73.5%

→ ↑2.5%

42 yrs76.0%

→ ↑0.8%

43 yrs76.8%

→ ↓8.2%

44 yrs68.6%

→ ↑4.7%

45 yrs73.3%

→ ↑0.6%

47 yrs73.9%

→ ↑3.6%

48 yrs77.5%

→ ↑2.5%

49 yrs80.0%

→ ↓4.4%

50 yrs75.6%

📊 View as table

Age	Pass Rate	Tests
35 yrs	69.4%	111
36 yrs	70.1%	107
37 yrs	62.1%	116
38 yrs	68.3%	101
39 yrs	69.7%	109
40 yrs	70.9%	103
41 yrs	73.5%	102
42 yrs	76.0%	100
43 yrs	76.8%	99
44 yrs	68.6%	51
45 yrs	73.3%	30
47 yrs	73.9%	46
48 yrs	77.5%	40
49 yrs	80.0%	45
50 yrs	75.6%	45

Pass Rate Trend

How the 1974 Triumph Stag Auto pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2024 (50 yrs)	75.6%	45
2023 (49 yrs)	80%	45
2022 (48 yrs)	77.5%	40
2021 (47 yrs)	73.9%	46
2019 (45 yrs)	73.3%	30
2018 (44 yrs)	68.6%	51
2017 (43 yrs)	76.8%	99
2016 (42 yrs)	76%	100
2015 (41 yrs)	73.5%	102
2014 (40 yrs)	70.9%	103
2013 (39 yrs)	69.7%	109
2012 (38 yrs)	68.3%	101
2011 (37 yrs)	62.1%	116
2010 (36 yrs)	70.1%	107
2009 (35 yrs)	69.4%	111

Year-by-Year MOT Results

2009

69.4%

Age (yrs) 35Tests 111Avg Mileage 57,425Top Failure Lamps, Reflectors and Electrical Equipment — 18.9%

2010

70.1%

Age (yrs) 36Tests 107Avg Mileage 55,640Top Failure Lamps, Reflectors and Electrical Equipment — 17.8%

2011High Fail Rate

62.1%

Age (yrs) 37Tests 116Avg Mileage 52,847Top Failure Lamps, Reflectors and Electrical Equipment — 24.1%

2012

68.3%

Age (yrs) 38Tests 101Avg Mileage 52,989Top Failure Suspension — 17.8%

2013

69.7%

Age (yrs) 39Tests 109Avg Mileage 55,335Top Failure Lamps, Reflectors and Electrical Equipment — 31.2%

2014

70.9%

Age (yrs) 40Tests 103Avg Mileage 54,290Top Failure Suspension — 36.9%

2015

73.5%

Age (yrs) 41Tests 102Avg Mileage 56,883Top Failure Brakes — 27.5%

2016

76.0%

Age (yrs) 42Tests 100Avg Mileage 56,347Top Failure Lamps, Reflectors and Electrical Equipment — 25.0%

2017

76.8%

Age (yrs) 43Tests 99Avg Mileage 56,680Top Failure Lamps, Reflectors and Electrical Equipment — 29.3%

2018

68.6%

Age (yrs) 44Tests 51Avg Mileage 58,558Top Failure Lamps, reflectors and electrical equipment — 29.4%

2019

73.3%

Age (yrs) 45Tests 30Avg Mileage 61,662Top Failure Suspension — 33.3%

2021

73.9%

Age (yrs) 47Tests 46Avg Mileage 56,434Top Failure Lamps, reflectors and electrical equipment — 41.3%

2022

77.5%

Age (yrs) 48Tests 40Avg Mileage 57,617Top Failure Brakes — 17.5%

2023

80.0%

Age (yrs) 49Tests 45Avg Mileage 53,413Top Failure Brakes — 33.3%

2024

75.6%

Age (yrs) 50Tests 45Avg Mileage 53,095Top Failure Suspension — 37.8%

MOT results for 1974 Triumph Stag Auto by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	35	69.4%	111	57,425	Lamps, Reflectors and Electrical Equipment — 18.9%
2010	36	70.1%	107	55,640	Lamps, Reflectors and Electrical Equipment — 17.8%
2011	37	62.1%	116	52,847	Lamps, Reflectors and Electrical Equipment — 24.1%
2012	38	68.3%	101	52,989	Suspension — 17.8%
2013	39	69.7%	109	55,335	Lamps, Reflectors and Electrical Equipment — 31.2%
2014	40	70.9%	103	54,290	Suspension — 36.9%
2015	41	73.5%	102	56,883	Brakes — 27.5%
2016	42	76.0%	100	56,347	Lamps, Reflectors and Electrical Equipment — 25.0%
2017	43	76.8%	99	56,680	Lamps, Reflectors and Electrical Equipment — 29.3%
2018	44	68.6%	51	58,558	Lamps, reflectors and electrical equipment — 29.4%
2019	45	73.3%	30	61,662	Suspension — 33.3%
2021	47	73.9%	46	56,434	Lamps, reflectors and electrical equipment — 41.3%
2022	48	77.5%	40	57,617	Brakes — 17.5%
2023	49	80.0%	45	53,413	Brakes — 33.3%
2024	50	75.6%	45	53,095	Suspension — 37.8%

Common MOT Failures

Top failure categories across all test years for 1974 Triumph Stag Auto, with age trends.

Lamps, Reflectors and Electrical Equipment

23.9%

↑ Increases with age

Lamps, reflectors and electrical equipment

21.7%

↓ Decreases with age

Suspension

21.6%

↑ Increases with age

Brakes

20.5%

↑ Increases with age

Noise, emissions and leaks

16.5%

↓ Decreases 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	13.5% (35 yrs)	37.8% (50 yrs)	+24.3%	🔴 ↑
Brakes	13.5% (35 yrs)	35.6% (50 yrs)	+22.1%	🔴 ↑

Other Manufacture Years

1971 1972 1973 1974 1975 1976 1977 1978

← Back to Triumph Stag Auto overview

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

About This Data

This page shows how Triumph Stag Auto cars manufactured in 1974 perform at MOT as they age. Data spans from 2009 to 2024, covering 1,205 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.