MG Midget 1500 MOT Failures

An analysis of 4,247 real DVSA MOT tests on the MG Midget 1500 — what fails, how often, and how that compares to every other car on UK roads. Generations covered: MK4 (1974–1980).

Where the MG Midget 1500 fails its MOT

The single biggest MOT failure point on the MG Midget 1500 is fluid leak — this model is 56 times more likely to fail on this item than the average car on UK roads. That makes it a major concern for anyone buying or owning this model. Across 4,247 MOT tests, 7.83% of all MG Midget 1500 tests recorded this as a failure.

Exhaust and emissions failures often point to catalytic converter degradation, lambda sensor faults, or — in diesel models — DPF problems. These can be expensive to fix and will cause an immediate MOT failure.

Other notable weak points include emissions failure (766x the fleet average), wheel bearings worn (31x the fleet average), significant brake effort recorded with no brake... (11x the fleet average), and coil springs broken (289x the fleet average). These ratios compare the MG Midget 1500's failure rate on each item against the national average for all cars tested — a ratio of 10x means this model fails ten times more often than a typical car.

The failures span 5 categories: Exhaust & Emissions, Suspension, Brakes, Lights & Electrics, Steering. If you're inspecting a MG Midget 1500 before purchase, these are the areas to focus on — and if any have been flagged as advisories on a previous MOT, they're likely to become failures in the near future.

How failures change with mileage

The MG Midget 1500's weak points shift as the car covers more miles. Understanding these patterns helps you know what to expect — and what to budget for — at each stage of ownership.

Under 60,000 miles

At this mileage, most failures are either design-related or caused by age rather than wear. Components like bushes and drop links may not have been replaced yet, and original-fit parts can deteriorate even on low-mileage cars that spend a lot of time sitting.

For the MG Midget 1500 specifically, the DVSA data shows the most common failures at this mileage are emissions failure (766x the average) and suspension pin, bush or joint worn (222x). fluid leak (56x) and wheel bearings worn (31x) also appear frequently.

60,000 to 100,000 miles

This is where routine wear items start to show up. Brake components, tyres, and exhaust parts have done serious work by this point. Cars that have been well serviced will show fewer of these failures — this mileage band is where good maintenance really separates the well-kept from the neglected.

For the MG Midget 1500 specifically, the DVSA data shows the most common failures at this mileage are emissions failure (361x the average) and coil springs broken (289x). fluid leak (23x) and wheel bearings worn (13x) also appear frequently.

Known issues beyond the MOT

An MOT only tests roadworthiness at a single point in time — it won't catch developing faults, intermittent problems, or issues that haven't yet reached the failure threshold. These are the issues that MG Midget 1500 specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.

Subframe mounting point corrosion (MK4) Dangerous

The rear subframe mounting points in the body structure are prone to corrosion that can compromise structural integrity. Affects MK4; typical independent garage repair cost is £800–£2,000.

Excessive emissions due to carburetor wear (MK4) Major

The 1500 Midget uses twin SU HS4 carburettors that wear over time, causing fuel mixture problems that result in excessive emissions. Affects MK4; typical independent garage repair cost is £400–£800.

Wheel bearing wear and failure (MK4) Major

The Midget 1500 uses wire wheels with knock-off hubs that place different loads on the wheel bearings compared to conventional steel wheels. Affects MK4; typical independent garage repair cost is £150–£300.

Sill corrosion (MK4) Major

The Midget's steel monocoque construction is particularly vulnerable to sill corrosion due to the design's low ground clearance and tendency for debris and moisture to collect in the box-section sills. Affects MK4; typical independent garage repair cost is £600–£1,500.

For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full MG Midget 1500 common problems breakdown.

What to check before buying a MG Midget 1500

Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a MG Midget 1500:

Exhaust & Emissions — check for fluid leak, emissions failure. Suspension — check for wheel bearings worn, coil springs broken, suspension pin, bush or joint worn. Brakes — check for significant brake effort recorded with no brake....

Beyond the MOT items, ask specifically about subframe mounting point corrosion and excessive emissions due to carburetor wear. These won't show up on a standard MOT but can be expensive to fix — repairs start from £800. A specialist pre-purchase inspection is worth the investment on this model.

Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. And verify the service history to confirm maintenance has been kept up to schedule. Enter any reg into our free car check to see the complete picture.

MOT failure data sourced from DVSA bulk test records via data.gov.uk. Ratios compare this model's failure rate against the national fleet average. Known issues sourced from manufacturer bulletins, specialist workshops, and verified owner reports.