1971 Triumph Herald — MOT History by Age

How cars manufactured in 1971 perform at MOT as they age

55 years

Current Age

73.5%

Latest Pass Rate

744

Total Tests (All Years)

49,771 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 1971 Triumph Herald as it ages.

38 yrs68.1%

→ ↓7.4%

39 yrs60.7%

→ ↑1.8%

40 yrs62.5%

→ ↑1.0%

41 yrs63.5%

→ ↑2.0%

42 yrs65.5%

→ ↓5.0%

43 yrs60.5%

→ ↑9.1%

44 yrs69.6%

→ ↑0.4%

45 yrs70.0%

→ ↓5.9%

46 yrs64.1%

→ ↑9.4%

47 yrs73.5%

📊 View as table

Age	Pass Rate	Tests
38 yrs	68.1%	91
39 yrs	60.7%	84
40 yrs	62.5%	88
41 yrs	63.5%	74
42 yrs	65.5%	84
43 yrs	60.5%	76
44 yrs	69.6%	79
45 yrs	70.0%	70
46 yrs	64.1%	64
47 yrs	73.5%	34

Pass Rate Trend

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

📊 View as table

Built	Pass Rate	Tests
2018 (47 yrs)	73.5%	34
2017 (46 yrs)	64.1%	64
2016 (45 yrs)	70%	70
2015 (44 yrs)	69.6%	79
2014 (43 yrs)	60.5%	76
2013 (42 yrs)	65.5%	84
2012 (41 yrs)	63.5%	74
2011 (40 yrs)	62.5%	88
2010 (39 yrs)	60.7%	84
2009 (38 yrs)	68.1%	91

Year-by-Year MOT Results

2009

68.1%

Age (yrs) 38Tests 91Avg Mileage 59,352Top Failure Brakes — 18.7%

2010High Fail Rate

60.7%

Age (yrs) 39Tests 84Avg Mileage 48,482Top Failure Brakes — 25.0%

2011High Fail Rate

62.5%

Age (yrs) 40Tests 88Avg Mileage 50,433Top Failure Brakes — 27.3%

2012High Fail Rate

63.5%

Age (yrs) 41Tests 74Avg Mileage 47,983Top Failure Suspension — 23.0%

2013

65.5%

Age (yrs) 42Tests 84Avg Mileage 51,136Top Failure Brakes — 54.8%

2014High Fail Rate

60.5%

Age (yrs) 43Tests 76Avg Mileage 50,280Top Failure Brakes — 57.9%

2015

69.6%

Age (yrs) 44Tests 79Avg Mileage 53,260Top Failure Lamps, Reflectors and Electrical Equipment — 30.4%

2016

70.0%

Age (yrs) 45Tests 70Avg Mileage 49,369Top Failure Suspension — 42.9%

2017High Fail Rate

64.1%

Age (yrs) 46Tests 64Avg Mileage 49,644Top Failure Brakes — 76.6%

2018

73.5%

Age (yrs) 47Tests 34Avg Mileage 49,771Top Failure Brakes — 50.0%

MOT results for 1971 Triumph Herald by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	38	68.1%	91	59,352	Brakes — 18.7%
2010	39	60.7%	84	48,482	Brakes — 25.0%
2011	40	62.5%	88	50,433	Brakes — 27.3%
2012	41	63.5%	74	47,983	Suspension — 23.0%
2013	42	65.5%	84	51,136	Brakes — 54.8%
2014	43	60.5%	76	50,280	Brakes — 57.9%
2015	44	69.6%	79	53,260	Lamps, Reflectors and Electrical Equipment — 30.4%
2016	45	70.0%	70	49,369	Suspension — 42.9%
2017	46	64.1%	64	49,644	Brakes — 76.6%
2018	47	73.5%	34	49,771	Brakes — 50.0%

Common MOT Failures

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

Brakes

38.3%

↑ Increases with age

Suspension

27.8%

↓ Decreases with age

Lamps, Reflectors and Electrical Equipment

24.6%

↓ Decreases with age

Body, Structure and General Items

17.4%

↑ Increases with age

Steering

16.2%

↑ 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	18.7% (38 yrs)	50.0% (47 yrs)	+31.3%	🔴 ↑
Body, Structure and General Items	9.9% (38 yrs)	23.5% (47 yrs)	+13.6%	🔴 ↑
Suspension	16.5% (38 yrs)	11.8% (47 yrs)	-4.7%	🟢 ↓
Lamps, Reflectors and Electrical Equipment	13.2% (38 yrs)	8.8% (47 yrs)	-4.4%	🟢 ↓

Other Manufacture Years

1964 1965 1966 1967 1968 1969 1970 1971

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About This Data

This page shows how Triumph Herald cars manufactured in 1971 perform at MOT as they age. Data spans from 2009 to 2018, covering 744 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.