1979 MG B Gt — MOT History by Age

How cars manufactured in 1979 perform at MOT as they age

47 years

Current Age

70.7%

Latest Pass Rate

5,116

Total Tests (All Years)

58,573 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 1979 MG B Gt as it ages.

30 yrs55.1%

→ ↑5.2%

31 yrs60.3%

→ ↓0.5%

32 yrs59.8%

→ ↑2.9%

33 yrs62.7%

→ ↓3.2%

34 yrs59.5%

→ ↑3.3%

35 yrs62.8%

→ ↓1.0%

36 yrs61.8%

→ ↑1.9%

37 yrs63.7%

→ ↑2.6%

38 yrs66.3%

→ ↑3.4%

39 yrs69.7%

→ ↑1.8%

40 yrs71.5%

→ ↑2.4%

41 yrs73.9%

→ ↑5.6%

42 yrs79.5%

→ ↓4.8%

43 yrs74.7%

→ ↑6.2%

44 yrs80.9%

→ ↓10.2%

45 yrs70.7%

📊 View as table

Age	Pass Rate	Tests
30 yrs	55.1%	581
31 yrs	60.3%	529
32 yrs	59.8%	500
33 yrs	62.7%	459
34 yrs	59.5%	462
35 yrs	62.8%	414
36 yrs	61.8%	435
37 yrs	63.7%	410
38 yrs	66.3%	371
39 yrs	69.7%	267
40 yrs	71.5%	207
41 yrs	73.9%	111
42 yrs	79.5%	112
43 yrs	74.7%	87
44 yrs	80.9%	89
45 yrs	70.7%	82

Pass Rate Trend

How the 1979 MG B Gt pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2024 (45 yrs)	70.7%	82
2023 (44 yrs)	80.9%	89
2022 (43 yrs)	74.7%	87
2021 (42 yrs)	79.5%	112
2020 (41 yrs)	73.9%	111
2019 (40 yrs)	71.5%	207
2018 (39 yrs)	69.7%	267
2017 (38 yrs)	66.3%	371
2016 (37 yrs)	63.7%	410
2015 (36 yrs)	61.8%	435
2014 (35 yrs)	62.8%	414
2013 (34 yrs)	59.5%	462
2012 (33 yrs)	62.7%	459
2011 (32 yrs)	59.8%	500
2010 (31 yrs)	60.3%	529
2009 (30 yrs)	55.1%	581

Year-by-Year MOT Results

2009High Fail Rate

55.1%

Age (yrs) 30Tests 581Avg Mileage 52,734Top Failure Brakes — 23.9%

2010High Fail Rate

60.3%

Age (yrs) 31Tests 529Avg Mileage 51,470Top Failure Suspension — 21.9%

2011High Fail Rate

59.8%

Age (yrs) 32Tests 500Avg Mileage 53,325Top Failure Suspension — 20.8%

2012High Fail Rate

62.7%

Age (yrs) 33Tests 459Avg Mileage 51,956Top Failure Lamps, Reflectors and Electrical Equipment — 22.4%

2013High Fail Rate

59.5%

Age (yrs) 34Tests 462Avg Mileage 52,926Top Failure Suspension — 48.5%

2014High Fail Rate

62.8%

Age (yrs) 35Tests 414Avg Mileage 52,193Top Failure Brakes — 39.1%

2015High Fail Rate

61.8%

Age (yrs) 36Tests 435Avg Mileage 52,320Top Failure Brakes — 48.5%

2016High Fail Rate

63.7%

Age (yrs) 37Tests 410Avg Mileage 52,987Top Failure Brakes — 39.3%

2017

66.3%

Age (yrs) 38Tests 371Avg Mileage 53,274Top Failure Suspension — 36.7%

2018

69.7%

Age (yrs) 39Tests 267Avg Mileage 53,082Top Failure Suspension — 33.0%

2019

71.5%

Age (yrs) 40Tests 207Avg Mileage 55,003Top Failure Brakes — 25.1%

2020

73.9%

Age (yrs) 41Tests 111Avg Mileage 54,590Top Failure Brakes — 24.3%

2021

79.5%

Age (yrs) 42Tests 112Avg Mileage 51,527Top Failure Lamps, reflectors and electrical equipment — 32.1%

2022

74.7%

Age (yrs) 43Tests 87Avg Mileage 55,556Top Failure Brakes — 25.3%

2023

80.9%

Age (yrs) 44Tests 89Avg Mileage 51,791Top Failure Suspension — 24.7%

2024

70.7%

Age (yrs) 45Tests 82Avg Mileage 58,573Top Failure Suspension — 23.2%

MOT results for 1979 MG B Gt by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	30	55.1%	581	52,734	Brakes — 23.9%
2010	31	60.3%	529	51,470	Suspension — 21.9%
2011	32	59.8%	500	53,325	Suspension — 20.8%
2012	33	62.7%	459	51,956	Lamps, Reflectors and Electrical Equipment — 22.4%
2013	34	59.5%	462	52,926	Suspension — 48.5%
2014	35	62.8%	414	52,193	Brakes — 39.1%
2015	36	61.8%	435	52,320	Brakes — 48.5%
2016	37	63.7%	410	52,987	Brakes — 39.3%
2017	38	66.3%	371	53,274	Suspension — 36.7%
2018	39	69.7%	267	53,082	Suspension — 33.0%
2019	40	71.5%	207	55,003	Brakes — 25.1%
2020	41	73.9%	111	54,590	Brakes — 24.3%
2021	42	79.5%	112	51,527	Lamps, reflectors and electrical equipment — 32.1%
2022	43	74.7%	87	55,556	Brakes — 25.3%
2023	44	80.9%	89	51,791	Suspension — 24.7%
2024	45	70.7%	82	58,573	Suspension — 23.2%

Common MOT Failures

Top failure categories across all test years for 1979 MG B Gt, with age trends.

Lamps, Reflectors and Electrical Equipment

30.7%

↑ Increases with age

Suspension

27.8%

— Consistent

Brakes

27.3%

↓ Decreases with age

Noise, emissions and leaks

20.1%

— Consistent

Lamps, reflectors and electrical equipment

19.9%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Brakes	23.9% (30 yrs)	19.5% (45 yrs)	-4.4%	🟢 ↓
Suspension	22.4% (30 yrs)	23.2% (45 yrs)	+0.8%	⚪ —

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

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About This Data

This page shows how MG B Gt cars manufactured in 1979 perform at MOT as they age. Data spans from 2009 to 2024, covering 5,116 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.