1977 MG Mgb — MOT History by Age

How cars manufactured in 1977 perform at MOT as they age

49 years

Current Age

58.1%

Latest Pass Rate

678

Total Tests (All Years)

40,994 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 Mgb as it ages.

32 yrs62.3%

→ ↑3.4%

33 yrs65.7%

→ ↓5.4%

34 yrs60.3%

→ ↑8.2%

35 yrs68.5%

→ ↓9.2%

36 yrs59.3%

→ ↑3.7%

37 yrs63.0%

→ ↑13.4%

38 yrs76.4%

→ ↓10.2%

39 yrs66.2%

→ ↑8.0%

40 yrs74.2%

→ ↓16.1%

41 yrs58.1%

📊 View as table

Age	Pass Rate	Tests
32 yrs	62.3%	69
33 yrs	65.7%	70
34 yrs	60.3%	73
35 yrs	68.5%	73
36 yrs	59.3%	81
37 yrs	63.0%	73
38 yrs	76.4%	72
39 yrs	66.2%	74
40 yrs	74.2%	62
41 yrs	58.1%	31

Pass Rate Trend

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

📊 View as table

Built	Pass Rate	Tests
2018 (41 yrs)	58.1%	31
2017 (40 yrs)	74.2%	62
2016 (39 yrs)	66.2%	74
2015 (38 yrs)	76.4%	72
2014 (37 yrs)	63%	73
2013 (36 yrs)	59.3%	81
2012 (35 yrs)	68.5%	73
2011 (34 yrs)	60.3%	73
2010 (33 yrs)	65.7%	70
2009 (32 yrs)	62.3%	69

Year-by-Year MOT Results

2009High Fail Rate

62.3%

Age (yrs) 32Tests 69Avg Mileage 48,733Top Failure Exhaust, Fuel and Emissions — 17.4%

2010

65.7%

Age (yrs) 33Tests 70Avg Mileage 50,774Top Failure Lamps, Reflectors and Electrical Equipment — 24.3%

2011High Fail Rate

60.3%

Age (yrs) 34Tests 73Avg Mileage 47,026Top Failure Suspension — 23.3%

2012

68.5%

Age (yrs) 35Tests 73Avg Mileage 48,113Top Failure Suspension — 16.4%

2013High Fail Rate

59.3%

Age (yrs) 36Tests 81Avg Mileage 58,072Top Failure Lamps, Reflectors and Electrical Equipment — 38.3%

2014High Fail Rate

63.0%

Age (yrs) 37Tests 73Avg Mileage 48,506Top Failure Suspension — 46.6%

2015

76.4%

Age (yrs) 38Tests 72Avg Mileage 51,709Top Failure Suspension — 29.2%

2016

66.2%

Age (yrs) 39Tests 74Avg Mileage 48,067Top Failure Lamps, Reflectors and Electrical Equipment — 50.0%

2017

74.2%

Age (yrs) 40Tests 62Avg Mileage 49,978Top Failure Brakes — 19.4%

2018High Fail Rate

58.1%

Age (yrs) 41Tests 31Avg Mileage 40,994Top Failure Brakes — 38.7%

MOT results for 1977 MG Mgb by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	32	62.3%	69	48,733	Exhaust, Fuel and Emissions — 17.4%
2010	33	65.7%	70	50,774	Lamps, Reflectors and Electrical Equipment — 24.3%
2011	34	60.3%	73	47,026	Suspension — 23.3%
2012	35	68.5%	73	48,113	Suspension — 16.4%
2013	36	59.3%	81	58,072	Lamps, Reflectors and Electrical Equipment — 38.3%
2014	37	63.0%	73	48,506	Suspension — 46.6%
2015	38	76.4%	72	51,709	Suspension — 29.2%
2016	39	66.2%	74	48,067	Lamps, Reflectors and Electrical Equipment — 50.0%
2017	40	74.2%	62	49,978	Brakes — 19.4%
2018	41	58.1%	31	40,994	Brakes — 38.7%

Common MOT Failures

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

Lamps, Reflectors and Electrical Equipment

27.5%

↑ Increases with age

Suspension

25.6%

↑ Increases with age

Brakes

22.6%

↑ Increases with age

Noise, emissions and leaks

19.4%

— Consistent

Exhaust, Fuel and Emissions

17.0%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Brakes	13.0% (32 yrs)	38.7% (41 yrs)	+25.7%	🔴 ↑
Suspension	11.6% (32 yrs)	25.8% (41 yrs)	+14.2%	🔴 ↑
Lamps, Reflectors and Electrical Equipment	17.4% (32 yrs)	29.0% (41 yrs)	+11.6%	🔴 ↑

Other Manufacture Years

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

← Back to MG Mgb overview

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

About This Data

This page shows how MG Mgb cars manufactured in 1977 perform at MOT as they age. Data spans from 2009 to 2018, covering 678 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.