Morgan Plus 4 MOT Failures
An analysis of 17,363 real DVSA MOT tests on the Morgan Plus 4 — what fails, how often, and how that compares to every other car on UK roads. Generations covered: CLASSIC (1950–2009), MODERN (2005–2020).
Where the Morgan Plus 4 fails its MOT
The single biggest MOT failure point on the Morgan Plus 4 is fluid leak — this model is 27 times more likely to fail on this item than the average car on UK roads. That makes it a significant weak point for anyone buying or owning this model. Across 17,363 MOT tests, 4% of all Morgan Plus 4 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 suspension pin, bush or joint worn (56x the fleet average), wheel bearings worn (16x the fleet average), steering rack wear (148x the fleet average), and stop lamps all missing or inoperative (19x the fleet average). These ratios compare the Morgan Plus 4'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 6 categories: Exhaust & Emissions, Suspension, Steering, Lights & Electrics, Seatbelts & Airbags and others. If you're inspecting a Morgan Plus 4 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.
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 Morgan Plus 4 specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
Excessive steering roughness Major
The steering system on Morgan Plus 4 models shows abnormally high rates of roughness in operation, appearing predominantly on lower-mileage examples. Affects MODERN; typical independent garage repair cost is £400–£800.
Suspension bushes and joints premature wear Major
Morgan Plus 4 models show exceptionally high rates of suspension component wear, particularly bushes and joints, even at low mileages. Affects MODERN; typical independent garage repair cost is £300–£600.
Wheel bearing wear Major
Wheel bearings on Morgan Plus 4 models show excessive wear rates, particularly concerning given the low annual mileages typical of these sports cars. Affects MODERN; typical independent garage repair cost is £150–£300.
Brake binding and imbalance Major
Morgan Plus 4 brake systems show high rates of binding and imbalance across axles, often appearing on low-mileage cars that may have stood unused for extended periods. Affects MODERN; typical independent garage repair cost is £200–£500.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Morgan Plus 4 common problems breakdown.
What to check before buying a Morgan Plus 4
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Morgan Plus 4:
Exhaust & Emissions — check for fluid leak. Suspension — check for suspension pin, bush or joint worn, wheel bearings worn, axle or kingpin wear. Steering — check for steering rack wear.
Beyond the MOT items, ask specifically about excessive steering roughness and suspension bushes and joints premature wear. These won't show up on a standard MOT but can be expensive to fix — repairs start from £400. 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.
Looking at a specific Morgan Plus 4?
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Morgan Plus 4 MOT FAQs
What are the most common MOT failures on a Morgan Plus 4?
Based on 17,363 DVSA MOT tests, the most common failure is fluid leak — at 27x the national fleet average. Other frequent failures include suspension pin, bush or joint worn and wheel bearings worn.
Is the Morgan Plus 4 reliable based on MOT data?
The Morgan Plus 4 has 8 MOT failure categories above the fleet average. Specialists also flag excessive steering roughness as a concern. A pre-purchase inspection and service history check are recommended.
What MOT failures should I expect at high mileage?
The most common high-mileage failures include fluid leak, suspension pin, bush or joint worn, wheel bearings worn.
How do I check a Morgan Plus 4's MOT history?
Enter the registration number into our free car check above. You'll see every MOT test result, advisories and failures, mileage readings, write-off status, and finance checks.
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.