1975 MG B — MOT History by Age

How cars manufactured in 1975 perform at MOT as they age

51 years

Current Age

83.1%

Latest Pass Rate

4,331

Total Tests (All Years)

45,444 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 1975 MG B as it ages.

34 yrs64.5%

→ ↑2.1%

35 yrs66.6%

→ ↑2.0%

36 yrs68.6%

→ ↑1.0%

37 yrs69.6%

→ ↓0.3%

38 yrs69.3%

→ ↓1.9%

39 yrs67.4%

→ ↑3.8%

40 yrs71.2%

→ ↓0.3%

41 yrs70.9%

→ ↑0.7%

42 yrs71.6%

→ ↑2.5%

43 yrs74.1%

→ ↓0.3%

44 yrs73.8%

→ ↑1.2%

45 yrs75.0%

→ ↓4.7%

46 yrs70.3%

→ ↓4.4%

47 yrs65.9%

→ ↑15.2%

48 yrs81.1%

→ ↑2.0%

49 yrs83.1%

📊 View as table

Age	Pass Rate	Tests
34 yrs	64.5%	386
35 yrs	66.6%	395
36 yrs	68.6%	376
37 yrs	69.6%	372
38 yrs	69.3%	358
39 yrs	67.4%	380
40 yrs	71.2%	368
41 yrs	70.9%	381
42 yrs	71.6%	430
43 yrs	74.1%	174
44 yrs	73.8%	122
45 yrs	75.0%	100
46 yrs	70.3%	138
47 yrs	65.9%	91
48 yrs	81.1%	106
49 yrs	83.1%	154

Pass Rate Trend

How the 1975 MG B pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2024 (49 yrs)	83.1%	154
2023 (48 yrs)	81.1%	106
2022 (47 yrs)	65.9%	91
2021 (46 yrs)	70.3%	138
2020 (45 yrs)	75%	100
2019 (44 yrs)	73.8%	122
2018 (43 yrs)	74.1%	174
2017 (42 yrs)	71.6%	430
2016 (41 yrs)	70.9%	381
2015 (40 yrs)	71.2%	368
2014 (39 yrs)	67.4%	380
2013 (38 yrs)	69.3%	358
2012 (37 yrs)	69.6%	372
2011 (36 yrs)	68.6%	376
2010 (35 yrs)	66.6%	395
2009 (34 yrs)	64.5%	386

Year-by-Year MOT Results

2009High Fail Rate

64.5%

Age (yrs) 34Tests 386Avg Mileage 44,509Top Failure Lamps, Reflectors and Electrical Equipment — 20.5%

2010

66.6%

Age (yrs) 35Tests 395Avg Mileage 44,281Top Failure Lamps, Reflectors and Electrical Equipment — 18.0%

2011

68.6%

Age (yrs) 36Tests 376Avg Mileage 42,961Top Failure Lamps, Reflectors and Electrical Equipment — 18.4%

2012

69.6%

Age (yrs) 37Tests 372Avg Mileage 44,939Top Failure Lamps, Reflectors and Electrical Equipment — 17.7%

2013

69.3%

Age (yrs) 38Tests 358Avg Mileage 45,159Top Failure Lamps, Reflectors and Electrical Equipment — 34.1%

2014

67.4%

Age (yrs) 39Tests 380Avg Mileage 44,580Top Failure Lamps, Reflectors and Electrical Equipment — 39.2%

2015

71.2%

Age (yrs) 40Tests 368Avg Mileage 46,092Top Failure Brakes — 34.0%

2016

70.9%

Age (yrs) 41Tests 381Avg Mileage 45,198Top Failure Lamps, Reflectors and Electrical Equipment — 39.1%

2017

71.6%

Age (yrs) 42Tests 430Avg Mileage 47,219Top Failure Lamps, Reflectors and Electrical Equipment — 35.8%

2018

74.1%

Age (yrs) 43Tests 174Avg Mileage 40,803Top Failure Brakes — 16.7%

2019

73.8%

Age (yrs) 44Tests 122Avg Mileage 45,536Top Failure Brakes — 29.5%

2020

75.0%

Age (yrs) 45Tests 100Avg Mileage 44,323Top Failure Lamps, reflectors and electrical equipment — 25.0%

2021

70.3%

Age (yrs) 46Tests 138Avg Mileage 43,162Top Failure Lamps, reflectors and electrical equipment — 35.5%

2022

65.9%

Age (yrs) 47Tests 91Avg Mileage 44,698Top Failure Lamps, reflectors and electrical equipment — 41.8%

2023

81.1%

Age (yrs) 48Tests 106Avg Mileage 43,362Top Failure Brakes — 22.6%

2024

83.1%

Age (yrs) 49Tests 154Avg Mileage 45,444Top Failure Lamps, reflectors and electrical equipment — 12.3%

MOT results for 1975 MG B by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	34	64.5%	386	44,509	Lamps, Reflectors and Electrical Equipment — 20.5%
2010	35	66.6%	395	44,281	Lamps, Reflectors and Electrical Equipment — 18.0%
2011	36	68.6%	376	42,961	Lamps, Reflectors and Electrical Equipment — 18.4%
2012	37	69.6%	372	44,939	Lamps, Reflectors and Electrical Equipment — 17.7%
2013	38	69.3%	358	45,159	Lamps, Reflectors and Electrical Equipment — 34.1%
2014	39	67.4%	380	44,580	Lamps, Reflectors and Electrical Equipment — 39.2%
2015	40	71.2%	368	46,092	Brakes — 34.0%
2016	41	70.9%	381	45,198	Lamps, Reflectors and Electrical Equipment — 39.1%
2017	42	71.6%	430	47,219	Lamps, Reflectors and Electrical Equipment — 35.8%
2018	43	74.1%	174	40,803	Brakes — 16.7%
2019	44	73.8%	122	45,536	Brakes — 29.5%
2020	45	75.0%	100	44,323	Lamps, reflectors and electrical equipment — 25.0%
2021	46	70.3%	138	43,162	Lamps, reflectors and electrical equipment — 35.5%
2022	47	65.9%	91	44,698	Lamps, reflectors and electrical equipment — 41.8%
2023	48	81.1%	106	43,362	Brakes — 22.6%
2024	49	83.1%	154	45,444	Lamps, reflectors and electrical equipment — 12.3%

Common MOT Failures

Top failure categories across all test years for 1975 MG B, with age trends.

Lamps, Reflectors and Electrical Equipment

26.8%

↓ Decreases with age

Lamps, reflectors and electrical equipment

23.4%

— Consistent

Brakes

21.6%

↓ Decreases with age

Suspension

18.2%

↓ Decreases with age

Noise, emissions and leaks

13.1%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Brakes	17.1% (34 yrs)	11.0% (49 yrs)	-6.1%	🟢 ↓
Suspension	16.1% (34 yrs)	12.3% (49 yrs)	-3.8%	🟢 ↓

Other Manufacture Years

1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

← Back to MG B overview

Looking for the best year to buy? See the full comparison on the MG B page →

About This Data

This page shows how MG B cars manufactured in 1975 perform at MOT as they age. Data spans from 2009 to 2024, covering 4,331 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.