1973 Triumph Stag Auto — MOT History by Age

How cars manufactured in 1973 perform at MOT as they age

53 years

Current Age

82.4%

Latest Pass Rate

1,064

Total Tests (All Years)

49,828 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 1973 Triumph Stag Auto as it ages.

36 yrs67.9%

→ ↑7.1%

37 yrs75.0%

→ ↓4.1%

38 yrs70.9%

→ ↑1.5%

39 yrs72.4%

→ ↑1.0%

40 yrs73.4%

→ ↑3.3%

41 yrs76.7%

→ ↓4.3%

42 yrs72.4%

→ ↓5.3%

43 yrs67.1%

→ ↑6.9%

44 yrs74.0%

→ ↓5.6%

45 yrs68.4%

→ ↑11.6%

46 yrs80.0%

→ ↓2.7%

48 yrs77.3%

→ ↓1.4%

49 yrs75.9%

→ ↑6.6%

50 yrs82.5%

→ ↓0.1%

51 yrs82.4%

📊 View as table

Age	Pass Rate	Tests
36 yrs	67.9%	81
37 yrs	75.0%	72
38 yrs	70.9%	86
39 yrs	72.4%	76
40 yrs	73.4%	79
41 yrs	76.7%	86
42 yrs	72.4%	87
43 yrs	67.1%	85
44 yrs	74.0%	73
45 yrs	68.4%	38
46 yrs	80.0%	35
48 yrs	77.3%	75
49 yrs	75.9%	54
50 yrs	82.5%	63
51 yrs	82.4%	74

Pass Rate Trend

How the 1973 Triumph Stag Auto pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2024 (51 yrs)	82.4%	74
2023 (50 yrs)	82.5%	63
2022 (49 yrs)	75.9%	54
2021 (48 yrs)	77.3%	75
2019 (46 yrs)	80%	35
2018 (45 yrs)	68.4%	38
2017 (44 yrs)	74%	73
2016 (43 yrs)	67.1%	85
2015 (42 yrs)	72.4%	87
2014 (41 yrs)	76.7%	86
2013 (40 yrs)	73.4%	79
2012 (39 yrs)	72.4%	76
2011 (38 yrs)	70.9%	86
2010 (37 yrs)	75%	72
2009 (36 yrs)	67.9%	81

Year-by-Year MOT Results

2009

67.9%

Age (yrs) 36Tests 81Avg Mileage 55,478Top Failure Brakes — 22.2%

2010

75.0%

Age (yrs) 37Tests 72Avg Mileage 45,021Top Failure Brakes — 15.3%

2011

70.9%

Age (yrs) 38Tests 86Avg Mileage 48,058Top Failure Suspension — 16.3%

2012

72.4%

Age (yrs) 39Tests 76Avg Mileage 50,032Top Failure Steering — 23.7%

2013

73.4%

Age (yrs) 40Tests 79Avg Mileage 49,216Top Failure Suspension — 39.2%

2014

76.7%

Age (yrs) 41Tests 86Avg Mileage 47,768Top Failure Lamps, Reflectors and Electrical Equipment — 26.7%

2015

72.4%

Age (yrs) 42Tests 87Avg Mileage 51,825Top Failure Suspension — 28.7%

2016

67.1%

Age (yrs) 43Tests 85Avg Mileage 50,474Top Failure Brakes — 36.5%

2017

74.0%

Age (yrs) 44Tests 73Avg Mileage 51,895Top Failure Lamps, Reflectors and Electrical Equipment — 30.1%

2018

68.4%

Age (yrs) 45Tests 38Avg Mileage 57,596Top Failure Suspension — 31.6%

2019

80.0%

Age (yrs) 46Tests 35Avg Mileage 55,730Top Failure Noise, emissions and leaks — 11.4%

2021

77.3%

Age (yrs) 48Tests 75Avg Mileage 51,518Top Failure Lamps, reflectors and electrical equipment — 33.3%

2022

75.9%

Age (yrs) 49Tests 54Avg Mileage 52,946Top Failure Brakes — 29.6%

2023

82.5%

Age (yrs) 50Tests 63Avg Mileage 51,692Top Failure Lamps, reflectors and electrical equipment — 15.9%

2024

82.4%

Age (yrs) 51Tests 74Avg Mileage 49,828Top Failure Lamps, reflectors and electrical equipment — 24.3%

MOT results for 1973 Triumph Stag Auto by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	36	67.9%	81	55,478	Brakes — 22.2%
2010	37	75.0%	72	45,021	Brakes — 15.3%
2011	38	70.9%	86	48,058	Suspension — 16.3%
2012	39	72.4%	76	50,032	Steering — 23.7%
2013	40	73.4%	79	49,216	Suspension — 39.2%
2014	41	76.7%	86	47,768	Lamps, Reflectors and Electrical Equipment — 26.7%
2015	42	72.4%	87	51,825	Suspension — 28.7%
2016	43	67.1%	85	50,474	Brakes — 36.5%
2017	44	74.0%	73	51,895	Lamps, Reflectors and Electrical Equipment — 30.1%
2018	45	68.4%	38	57,596	Suspension — 31.6%
2019	46	80.0%	35	55,730	Noise, emissions and leaks — 11.4%
2021	48	77.3%	75	51,518	Lamps, reflectors and electrical equipment — 33.3%
2022	49	75.9%	54	52,946	Brakes — 29.6%
2023	50	82.5%	63	51,692	Lamps, reflectors and electrical equipment — 15.9%
2024	51	82.4%	74	49,828	Lamps, reflectors and electrical equipment — 24.3%

Common MOT Failures

Top failure categories across all test years for 1973 Triumph Stag Auto, with age trends.

Suspension

22.6%

↓ Decreases with age

Lamps, Reflectors and Electrical Equipment

22.5%

↑ Increases with age

Brakes

20.6%

— Consistent

Lamps, reflectors and electrical equipment

17.4%

↑ Increases with age

Steering

13.5%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Suspension	18.5% (36 yrs)	14.9% (51 yrs)	-3.6%	🟢 ↓
Brakes	22.2% (36 yrs)	21.6% (51 yrs)	-0.6%	⚪ —

Other Manufacture Years

1971 1972 1973 1974 1975 1976 1977 1978

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About This Data

This page shows how Triumph Stag Auto cars manufactured in 1973 perform at MOT as they age. Data spans from 2009 to 2024, covering 1,064 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.