MOT failure rates

Morgan Plus Four MOT failure rates: what to expect

What fails on a Morgan Plus Four at MOT, how often, and what each fix typically costs.

Updated 4th September 2026

The Morgan Plus Four, a classic British sports car, is known for its unique design and driving experience. Common failures include lighting, suspension, and brakes, with repair costs varying based on the specific problem.

Lighting Issues

One of the most frequent causes of MOT failures for the Morgan Plus Four is lighting problems. This includes issues with headlights, indicators, and brake lights. A blown bulb or misaligned headlight can lead to an automatic failure.

Regular checks and timely replacements can help avoid these problems.

Suspension Problems

The suspension system is crucial for the handling and comfort of the Morgan Plus Four. MOT failures often arise from worn shock absorbers or damaged springs. These components are essential for maintaining vehicle stability and safety.

If multiple components need replacing, the total repair bill can increase significantly. Regular maintenance and inspections can help identify suspension issues before they lead to an MOT failure.

Brake System Deficiencies

Brakes are a critical safety feature, and MOT testers pay close attention to their condition. Common failures for the Morgan Plus Four include worn brake pads, discs, or fluid leaks. Any deficiency in the braking system can lead to serious safety concerns.

Regular brake checks can prevent these issues from arising.

Tyre Condition

Tyres are another common area where the Morgan Plus Four can fail its MOT. Issues such as insufficient tread depth or uneven wear can lead to a failed test. The legal minimum tread depth in the UK is 1.6mm, and anything below this can result in a failure.

Regularly checking tyre pressure and tread depth can help maintain tyre condition and avoid MOT failures.

Exhaust Emissions

The Morgan Plus Four, like all vehicles, must meet specific emissions standards during its MOT. Failures can occur due to a faulty exhaust system or issues with the catalytic converter. High emissions can indicate underlying problems that need addressing.

Regular servicing and checks can help keep emissions within acceptable limits and prevent MOT failures.

Bodywork and Structural Integrity

While not as common, bodywork and structural integrity issues can also lead to MOT failures for the Morgan Plus Four. Rust, particularly on older models, can compromise the vehicle’s safety and lead to a failed test.

Repair costs for bodywork can vary significantly based on the extent of the damage. Regular inspections and timely repairs can help maintain the integrity of the vehicle and ensure it passes its MOT.

Morgan Plus Four recall record

1 recall has been issued for the Morgan Plus Four, in 2022.

  1. PREMATURE DEGRADATION OF THE RUBBER SEALS IN THE BRAKE MASTER CYLINDER

    R/2022/168

    Issued 1 June 2022

    Investigations have identified premature degradation of the rubber seal(s) in the brake master cylinder compromising brake performance and in extreme cases causing brake failure.

    Remedy:Replacement of the master cylinder or the master cylinder seals.

    Affects cars built May 2019 to May 2022

A recall applies to a build range, not to every car of this model. Check a registration to see whether one specific vehicle has an outstanding recall.

Frequently asked questions

What is the Morgan Plus Four mot?

The Morgan Plus Four mot refers to the Ministry of Transport test that assesses the vehicle's roadworthiness. It is a legal requirement for vehicles over three years old in the UK.

How often does a Morgan Plus Four need an mot?

A Morgan Plus Four must have an mot test every year once it is three years old. This ensures that the vehicle meets safety and environmental standards.

What are common reasons for a Morgan Plus Four to fail its mot?

Common reasons for failure include issues with brakes, lights, tyres, and emissions. Regular maintenance can help prevent these problems.

Can I drive my Morgan Plus Four without a valid mot?

No, you cannot legally drive a Morgan Plus Four without a valid mot certificate, except when driving to a pre-booked mot appointment.

How can I prepare my Morgan Plus Four for its mot?

To prepare, check the lights, brakes, and tyres, and ensure all fluids are topped up. It may also be helpful to have a professional inspection before the test.

Where can I get my Morgan Plus Four mot done?

You can get your Morgan Plus Four mot done at any approved mot testing centre in the UK. It's advisable to choose a centre with good reviews.

What should I do if my Morgan Plus Four fails its mot?

If your Morgan Plus Four fails its mot, you will receive a list of issues that need addressing. You can have the repairs done and then retest the vehicle.

Is there a grace period for renewing my Morgan Plus Four mot?

There is no official grace period for renewing your mot. It is best to renew it before the expiry date to avoid legal issues.

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