1975 MG B Gt — MOT History by Age

How cars manufactured in 1975 perform at MOT as they age

51 years

Current Age

80.0%

Latest Pass Rate

3,793

Total Tests (All Years)

37,928 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 Gt as it ages.

34 yrs55.7%

→ ↑6.3%

35 yrs62.0%

→ ↓2.9%

36 yrs59.1%

→ ↑1.7%

37 yrs60.8%

→ ↑3.1%

38 yrs63.9%

→ ↑1.7%

39 yrs65.6%

→ ↓1.7%

40 yrs63.9%

→ ↑5.5%

41 yrs69.4%

→ ↑2.5%

42 yrs71.9%

→ ↓0.1%

43 yrs71.8%

→ ↑8.2%

44 yrs80.0%

→ ↓8.3%

45 yrs71.7%

→ ↑0.5%

46 yrs72.2%

→ ↑4.1%

47 yrs76.3%

→ ↑1.1%

48 yrs77.4%

→ ↑2.6%

49 yrs80.0%

📊 View as table

Age	Pass Rate	Tests
34 yrs	55.7%	424
35 yrs	62.0%	363
36 yrs	59.1%	364
37 yrs	60.8%	347
38 yrs	63.9%	366
39 yrs	65.6%	331
40 yrs	63.9%	335
41 yrs	69.4%	359
42 yrs	71.9%	342
43 yrs	71.8%	117
44 yrs	80.0%	85
45 yrs	71.7%	60
46 yrs	72.2%	79
47 yrs	76.3%	59
48 yrs	77.4%	62
49 yrs	80.0%	100

Pass Rate Trend

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

📊 View as table

Built	Pass Rate	Tests
2024 (49 yrs)	80%	100
2023 (48 yrs)	77.4%	62
2022 (47 yrs)	76.3%	59
2021 (46 yrs)	72.2%	79
2020 (45 yrs)	71.7%	60
2019 (44 yrs)	80%	85
2018 (43 yrs)	71.8%	117
2017 (42 yrs)	71.9%	342
2016 (41 yrs)	69.4%	359
2015 (40 yrs)	63.9%	335
2014 (39 yrs)	65.6%	331
2013 (38 yrs)	63.9%	366
2012 (37 yrs)	60.8%	347
2011 (36 yrs)	59.1%	364
2010 (35 yrs)	62%	363
2009 (34 yrs)	55.7%	424

Year-by-Year MOT Results

2009High Fail Rate

55.7%

Age (yrs) 34Tests 424Avg Mileage 48,563Top Failure Lamps, Reflectors and Electrical Equipment — 25.7%

2010High Fail Rate

62.0%

Age (yrs) 35Tests 363Avg Mileage 46,373Top Failure Lamps, Reflectors and Electrical Equipment — 21.2%

2011High Fail Rate

59.1%

Age (yrs) 36Tests 364Avg Mileage 47,043Top Failure Suspension — 23.9%

2012High Fail Rate

60.8%

Age (yrs) 37Tests 347Avg Mileage 48,753Top Failure Suspension — 21.3%

2013High Fail Rate

63.9%

Age (yrs) 38Tests 366Avg Mileage 48,209Top Failure Lamps, Reflectors and Electrical Equipment — 48.4%

2014

65.6%

Age (yrs) 39Tests 331Avg Mileage 47,403Top Failure Lamps, Reflectors and Electrical Equipment — 48.3%

2015High Fail Rate

63.9%

Age (yrs) 40Tests 335Avg Mileage 46,830Top Failure Lamps, Reflectors and Electrical Equipment — 62.1%

2016

69.4%

Age (yrs) 41Tests 359Avg Mileage 49,281Top Failure Brakes — 35.7%

2017

71.9%

Age (yrs) 42Tests 342Avg Mileage 50,164Top Failure Brakes — 27.8%

2018

71.8%

Age (yrs) 43Tests 117Avg Mileage 47,767Top Failure Brakes — 28.2%

2019

80.0%

Age (yrs) 44Tests 85Avg Mileage 45,122Top Failure Brakes — 15.3%

2020

71.7%

Age (yrs) 45Tests 60Avg Mileage 49,475Top Failure Lamps, reflectors and electrical equipment — 40.0%

2021

72.2%

Age (yrs) 46Tests 79Avg Mileage 49,744Top Failure Lamps, reflectors and electrical equipment — 51.9%

2022

76.3%

Age (yrs) 47Tests 59Avg Mileage 49,951Top Failure Lamps, reflectors and electrical equipment — 25.4%

2023

77.4%

Age (yrs) 48Tests 62Avg Mileage 49,665Top Failure Lamps, reflectors and electrical equipment — 24.2%

2024

80.0%

Age (yrs) 49Tests 100Avg Mileage 37,928Top Failure Lamps, reflectors and electrical equipment — 10.0%

MOT results for 1975 MG B Gt by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	34	55.7%	424	48,563	Lamps, Reflectors and Electrical Equipment — 25.7%
2010	35	62.0%	363	46,373	Lamps, Reflectors and Electrical Equipment — 21.2%
2011	36	59.1%	364	47,043	Suspension — 23.9%
2012	37	60.8%	347	48,753	Suspension — 21.3%
2013	38	63.9%	366	48,209	Lamps, Reflectors and Electrical Equipment — 48.4%
2014	39	65.6%	331	47,403	Lamps, Reflectors and Electrical Equipment — 48.3%
2015	40	63.9%	335	46,830	Lamps, Reflectors and Electrical Equipment — 62.1%
2016	41	69.4%	359	49,281	Brakes — 35.7%
2017	42	71.9%	342	50,164	Brakes — 27.8%
2018	43	71.8%	117	47,767	Brakes — 28.2%
2019	44	80.0%	85	45,122	Brakes — 15.3%
2020	45	71.7%	60	49,475	Lamps, reflectors and electrical equipment — 40.0%
2021	46	72.2%	79	49,744	Lamps, reflectors and electrical equipment — 51.9%
2022	47	76.3%	59	49,951	Lamps, reflectors and electrical equipment — 25.4%
2023	48	77.4%	62	49,665	Lamps, reflectors and electrical equipment — 24.2%
2024	49	80.0%	100	37,928	Lamps, reflectors and electrical equipment — 10.0%

Common MOT Failures

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

Lamps, Reflectors and Electrical Equipment

32.8%

↓ Decreases with age

Lamps, reflectors and electrical equipment

25.0%

— Consistent

Suspension

24.5%

↓ Decreases with age

Brakes

24.4%

↓ Decreases with age

Body, chassis, structure

12.6%

↑ 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	22.2% (34 yrs)	7.0% (49 yrs)	-15.2%	🟢 ↓
Suspension	22.4% (34 yrs)	8.0% (49 yrs)	-14.4%	🟢 ↓

Other Manufacture Years

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

← Back to MG B Gt overview

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

About This Data

This page shows how MG B Gt cars manufactured in 1975 perform at MOT as they age. Data spans from 2009 to 2024, covering 3,793 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.