What year MG B is most reliable?

Based on MOT first-test pass rates, the 1981 MG B has the highest pass rate at 76.7%, out of 709 vehicles tested.

What are the most common MG B MOT failures?

The most common MG B MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

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MG B — Reliability by Year

1,735 vehicles · MOT data 1980–1981 · first-test pass rates

This page shows MOT first-test pass rates for each year the MG B was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

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Best pass rate year

1981

76.7% pass rate · 709 vehicles

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Lowest pass rate year

1980

76.7% pass rate · 1,026 vehicles

Year	Pass rate	Avg mileage	Vehicles
1981	76.7%	50,243 mi	709
1980	76.7%	51,773 mi	1,026

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