1977 MG B Gt — MOT History by Age

How cars manufactured in 1977 perform at MOT as they age

49 years

Current Age

76.6%

Latest Pass Rate

3,154

Total Tests (All Years)

45,480 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 1977 MG B Gt as it ages.

32 yrs53.9%

→ ↑6.0%

33 yrs59.9%

→ ↑1.0%

34 yrs60.9%

→ ↓3.6%

35 yrs57.3%

→ ↑3.5%

36 yrs60.8%

→ ↓5.3%

37 yrs55.5%

→ ↑4.7%

38 yrs60.2%

→ ↑2.1%

39 yrs62.3%

→ ↑4.1%

40 yrs66.4%

→ ↑4.4%

41 yrs70.8%

→ ↓5.5%

42 yrs65.3%

→ ↑4.3%

43 yrs69.6%

→ ↑14.0%

44 yrs83.6%

→ ↓4.4%

45 yrs79.2%

→ ↓7.5%

46 yrs71.7%

→ ↑4.9%

47 yrs76.6%

📊 View as table

Age	Pass Rate	Tests
32 yrs	53.9%	360
33 yrs	59.9%	342
34 yrs	60.9%	320
35 yrs	57.3%	309
36 yrs	60.8%	278
37 yrs	55.5%	281
38 yrs	60.2%	279
39 yrs	62.3%	273
40 yrs	66.4%	268
41 yrs	70.8%	106
42 yrs	65.3%	72
43 yrs	69.6%	46
44 yrs	83.6%	67
45 yrs	79.2%	53
46 yrs	71.7%	53
47 yrs	76.6%	47

Pass Rate Trend

How the 1977 MG B Gt pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2024 (47 yrs)	76.6%	47
2023 (46 yrs)	71.7%	53
2022 (45 yrs)	79.2%	53
2021 (44 yrs)	83.6%	67
2020 (43 yrs)	69.6%	46
2019 (42 yrs)	65.3%	72
2018 (41 yrs)	70.8%	106
2017 (40 yrs)	66.4%	268
2016 (39 yrs)	62.3%	273
2015 (38 yrs)	60.2%	279
2014 (37 yrs)	55.5%	281
2013 (36 yrs)	60.8%	278
2012 (35 yrs)	57.3%	309
2011 (34 yrs)	60.9%	320
2010 (33 yrs)	59.9%	342
2009 (32 yrs)	53.9%	360

Year-by-Year MOT Results

2009High Fail Rate

53.9%

Age (yrs) 32Tests 360Avg Mileage 49,587Top Failure Brakes — 25.3%

2010High Fail Rate

59.9%

Age (yrs) 33Tests 342Avg Mileage 49,599Top Failure Suspension — 23.1%

2011High Fail Rate

60.9%

Age (yrs) 34Tests 320Avg Mileage 48,773Top Failure Suspension — 20.6%

2012High Fail Rate

57.3%

Age (yrs) 35Tests 309Avg Mileage 50,955Top Failure Lamps, Reflectors and Electrical Equipment — 23.3%

2013High Fail Rate

60.8%

Age (yrs) 36Tests 278Avg Mileage 49,024Top Failure Suspension — 56.1%

2014High Fail Rate

55.5%

Age (yrs) 37Tests 281Avg Mileage 52,189Top Failure Brakes — 65.5%

2015High Fail Rate

60.2%

Age (yrs) 38Tests 279Avg Mileage 49,324Top Failure Suspension — 52.0%

2016High Fail Rate

62.3%

Age (yrs) 39Tests 273Avg Mileage 50,245Top Failure Lamps, Reflectors and Electrical Equipment — 39.9%

2017

66.4%

Age (yrs) 40Tests 268Avg Mileage 49,738Top Failure Lamps, Reflectors and Electrical Equipment — 44.4%

2018

70.8%

Age (yrs) 41Tests 106Avg Mileage 49,946Top Failure Brakes — 20.8%

2019

65.3%

Age (yrs) 42Tests 72Avg Mileage 48,767Top Failure Suspension — 48.6%

2020

69.6%

Age (yrs) 43Tests 46Avg Mileage 50,327Top Failure Suspension — 30.4%

2021

83.6%

Age (yrs) 44Tests 67Avg Mileage 50,099Top Failure Lamps, reflectors and electrical equipment — 20.9%

2022

79.2%

Age (yrs) 45Tests 53Avg Mileage 46,708Top Failure Suspension — 24.5%

2023

71.7%

Age (yrs) 46Tests 53Avg Mileage 46,607Top Failure Suspension — 26.4%

2024

76.6%

Age (yrs) 47Tests 47Avg Mileage 45,480Top Failure Brakes — 23.4%

MOT results for 1977 MG B Gt by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	32	53.9%	360	49,587	Brakes — 25.3%
2010	33	59.9%	342	49,599	Suspension — 23.1%
2011	34	60.9%	320	48,773	Suspension — 20.6%
2012	35	57.3%	309	50,955	Lamps, Reflectors and Electrical Equipment — 23.3%
2013	36	60.8%	278	49,024	Suspension — 56.1%
2014	37	55.5%	281	52,189	Brakes — 65.5%
2015	38	60.2%	279	49,324	Suspension — 52.0%
2016	39	62.3%	273	50,245	Lamps, Reflectors and Electrical Equipment — 39.9%
2017	40	66.4%	268	49,738	Lamps, Reflectors and Electrical Equipment — 44.4%
2018	41	70.8%	106	49,946	Brakes — 20.8%
2019	42	65.3%	72	48,767	Suspension — 48.6%
2020	43	69.6%	46	50,327	Suspension — 30.4%
2021	44	83.6%	67	50,099	Lamps, reflectors and electrical equipment — 20.9%
2022	45	79.2%	53	46,708	Suspension — 24.5%
2023	46	71.7%	53	46,607	Suspension — 26.4%
2024	47	76.6%	47	45,480	Brakes — 23.4%

Common MOT Failures

Top failure categories across all test years for 1977 MG B Gt, with age trends.

Lamps, Reflectors and Electrical Equipment

33.8%

↑ Increases with age

Suspension

31.0%

↓ Decreases with age

Brakes

29.8%

— Consistent

Lamps, reflectors and electrical equipment

21.1%

↑ Increases with age

Exhaust, Fuel and Emissions

19.4%

↑ 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
Suspension	24.7% (32 yrs)	12.8% (47 yrs)	-11.9%	🟢 ↓
Brakes	25.3% (32 yrs)	23.4% (47 yrs)	-1.9%	⚪ —

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 1977 perform at MOT as they age. Data spans from 2009 to 2024, covering 3,154 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.