Should I check the MOT history before buying a 1980 MG B?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 1980 MG B?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 1980 MG B?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Do I need an HPI check when buying a 1980 MG B?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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MG B (1980)

1,026 real MOT outcomes analysed • 60.7% first-time pass rate

1980 MG B

CarHunch analysed 1,026 real MOT records for the 1980 MG B. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

Below average reliability 19.3% below UK average

60.7%

pass MOT first time

UK average: ~80%

51,785

typical mileage

26,558–75,153 middle half

15.5%

ever had a dangerous defect

recorded at any MOT

2.23

avg MOT failures per car

over 9.5 tests on record

What to check before buying a 1980 MG B

Practical pre-purchase checks for this age and model.

📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.

Before you buy a MG B

MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.

Inspection

Have a qualified mechanic check this car before you commit to buying →

CarHunch may earn a small commission if you buy via these links — at no extra cost to you.

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (99%)	1,014	60.5%	2.25
Other (1%)	11	80.3%	0.36
Electric (0%)	1	57.1%	3

Mileage Distribution

Most 1980 MG B vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.

26,558

low mileage

51,785

typical

75,153

high mileage

Half of all 1980 MG B vehicles fall between 26,558 and 75,153 miles.

1980 MG B — Still on the Road

Numbers are declining — 124 vehicles still getting MOTs in 2025 (28% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.

MOT History Averages

9.5

Avg MOT tests per vehicle

2.23

Avg failures per vehicle

7.2

Avg advisories per vehicle

Most Common MOT Issues — 1980 MG B

Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.

58.8%

Exhaust emissions carbon monoxide content excessive
36.2%

Oil leak
31.3%

Oil leak, but not excessive
28.9%

Exhaust emissions hydrocarbon content excessive
24.7%

Windscreen washer provides insufficient washer liquid
15.7%

Offside Rear fog lamp not working
15%

Parking brake: efficiency below requirements
13.8%

Nearside Front Axle king pin has slight play in pin and/or bush

Data covers a 3-year window centred on 1980. Counts include advisories and failures.

Found a specific MG B?

Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.

Other model years — MG B:

1981