Should I check the MOT history before buying a 1981 MG B GT?

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 1981 MG B GT?

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 1981 MG B GT?

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.

Is the 1981 MG B GT reliable?

Based on MOT data from 1,155 vehicles, the 1981 MG B GT has a first-time MOT pass rate of 70.2%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 1981 MG B GT?

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 GT (1981)

1,155 real MOT outcomes analysed • 70.2% first-time pass rate

1981 MG B GT

CarHunch analysed 1,155 real MOT records for the 1981 MG B GT. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 1981 MG B GT has a below-average first-time pass rate (70.2% vs ~80% UK average) — check the specific vehicle's full MOT history carefully before buying.

⚠️ About 1 in 12 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

70.2%

UK average ~80%

Below average

Dangerous (ever)

8.3%

At least once in MOT history

Check this vehicle

Avg failures / car

1.44

Over 5.4 tests on record

High

Typical mileage

56k

Middle half: 31k–75k

For context

⚠️ Below average. More vehicles in this cohort fail their first MOT than typical. Scrutinise this vehicle's history — look for recurring issues, not just the latest result.

🔧 Expect consumable spend. An average of 4.5 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 1,155 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

Buyer beware — pass it on

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 1,155 MG B GT cars.

Before you buy a 1981 MG B GT

Based on MOT data from 1,155 vehicles — here's what to check.

📋 Check the full MOT history. 8.3% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (100%)	1,151	70.2%	1.44

Colour Breakdown

Based on 47,108 MG B GT vehicles registered in the UK — across all years. From DVLA registration records.

Red 23.9%

11,271

Blue 15.3%

7,224

White 14.8%

6,955

Green 14.3%

6,744

Yellow 9.5%

4,490

Black 9.3%

4,390

Orange 4.9%

2,321

Gold 2.6%

1,205

Brown 2.2%

1,025

Silver 1.3%

606

Purple 1%

459

Grey 0.9%

418

Mileage Distribution

Most 1981 MG B GT vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

55,728

typical

31,102

low mileage

74,537

high mileage

Half of all 1981 MG B GT vehicles fall between 31,102 and 74,537 miles.

Is the mileage you're seeing normal?

✓ Under 31,102 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 31,102–74,537 miles — normal for age. This is where most 1981 MG B GTs sit.

⚠ Over 100,624 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

1981 MG B GT — Still on the Road

Numbers are thinning — 21% of 1981 MG B GTs are still active.

Numbers are declining — 50 vehicles still getting MOTs in 2025 (21% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

5.4

Avg MOT tests per vehicle

1.44

Avg failures per vehicle

4.5

Avg advisories per vehicle

Other model years — MG B GT: All B GT years → Which year to buy? →

1980

Or browse all models: MG →

Compare with another model

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Buyer beware — pass it on