MOT failure rates

Mazda MX-5 MOT failure rates: what to expect

What fails on a Mazda MX-5 at MOT, how often, and what each fix typically costs.

Updated 4th September 2026 DVSA data: Across 89,699 recorded MOT tests, 21.3% failed.

Mazda MX-5
Image via Wikipedia, CC-licensed.

The Mazda MX-5 is a beloved sports car, but like any vehicle, it is not immune to MOT failures. Common issues include corrosion, suspension wear, and lighting faults. Understanding these problems and their typical repair costs can help owners prepare for their next MOT test.

Corrosion Issues

Corrosion is a frequent culprit for MOT failures in the Mazda MX-5, particularly in older models. The underbody, sills, and wheel arches are common areas where rust can develop. Regular inspections and preventative measures can help mitigate this issue.

Repairing corrosion can vary in cost depending on the extent of the damage. Owners should consider regular rust-proofing treatments to prolong the life of their vehicle.

Suspension Wear

Suspension components, including bushings, dampers, and springs, are often found to be worn during the MOT. The MX-5’s sporty handling can lead to increased wear on these parts, especially if the car has been driven enthusiastically.

Regular maintenance and checks can help identify issues before they lead to MOT failures, ensuring a smoother ride and better handling.

Lighting Failures

Lighting issues are another common reason for MOT failures in the Mazda MX-5. This includes problems with headlights, brake lights, and indicators. Faulty bulbs or electrical issues can easily lead to a failed test.

Regularly checking lights can prevent last-minute fixes before an MOT.

Brake System Deficiencies

The brake system is critical for safety and is closely inspected during the MOT. Common issues include worn brake pads, discs, and fluid leaks. The MX-5’s performance nature means that brakes may wear faster than in more sedate vehicles.

Ensuring brakes are regularly serviced and replaced when needed can help avoid MOT failures and maintain optimal safety.

Exhaust Emissions

Emissions testing is a key part of the MOT, and the Mazda MX-5 can sometimes struggle with emissions if the exhaust system is not functioning properly. Problems can arise from a failing catalytic converter or issues within the engine management system.

Regular servicing and using quality fuel can help keep emissions in check, reducing the likelihood of MOT failures related to exhaust systems.

Tyre Condition

Tyres are vital for safety and performance, and their condition is thoroughly checked during the MOT. Common issues include tread depth below the legal limit and uneven wear, which can indicate alignment problems.

Regularly checking tyre pressure and tread depth can help ensure that they remain within legal limits and can prevent MOT failures related to tyre condition.

Mazda MX-5 recall record

9 recalls have been issued for the Mazda MX-5, between 2000 and 2025.

  1. Fuel Pipe Concern

    R/2025/442

    Issued 3 November 2025

    On affected vehicles The brackets used to secure the fuel pipes to the engine may not be tightened sufficiently. If the engine is repeatedly operated at high speed such as during circuit driving vibrations may cause the fuel pipe to resonate potentially causing the pipe to leak. The fuel leakage may increase the risk of fire.

    Remedy:Replace the fuel pipe with a modified part.

    Affects cars built May 2015 to Apr 2018

  2. MX-5 Traction/Stability Light May Fail to Illuminate

    R/2025/202

    Issued 1 September 2025

    On affected vehicles the Traction Control System (TCS)/Dynamic Stability Control (DSC) indicator light may not illuminate when abnormal yaw rate characteristics are detected due to a software diagnostic programming error. This issue does not affect vehicle drivability or braking performance.

    Remedy:Replace the DSC Hydraulic Unit/Control Module (HU/CM) with a modified part that includes improved software.

    Affects cars built Nov 2023 to Feb 2025

  3. MX-5 Parking Assist Unit Reprogramming

    R/2025/043

    Issued 28 February 2025

    On affected vehicles when reversing obstructions may not be detected correctly due to inappropriate software in the parking assist unit which may increase the risk of an accident.

    Remedy:Reprogram the parking assist unit.

    Affects cars built Nov 2023 to Sept 2024

  4. LOW PRESSURE FUEL PUMP IMPELLER MIGHT BECOME DEFORMED

    R/2021/435

    Issued 4 January 2022

    The impeller in the low-pressure fuel pump may become deformed causing fuel pump failure.

    Remedy:Replace the low-pressure fuel pump with an improved part.

    Affects cars built Apr 2018 to Oct 2018

5 older recalls not shown.

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.

Mazda MX-5 MOT record

From 89,699 recorded MOT tests, 21.3% failed.

MOT pass and failure rates by year of first registration
RegisteredTestsFailedMedian mileage
20221,3023.1%12,636 mi
20211,4303.7%16,750 mi
20201,0305.5%18,582 mi
20193,8926.2%23,083 mi
20184,1597.5%28,143 mi
20174,4798.0%31,756 mi
20164,04111.1%38,019 mi
20152,92711.2%40,584 mi

Most common reasons for failure

  1. A suspension component excessively damaged or corroded28.8%
  2. A tyre seriously damaged20.5%
  3. A suspension pin, bush or joint excessively worn18.0%
  4. The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired17.2%
  5. Tyre tread depth not in accordance with the requirements15.5%

Figures cover every Mazda MX-5 tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Mazda MX-5 official figures

Median across 41 variants on sale, petrol, petrol electric.

Combined economy
41.5 mpg
WLTP median across variants
CO2 emissions
153 g/km
Sets the first-year tax rate

Official figures for new cars. Real economy varies with driving, load and conditions.

Frequently asked questions

What is the Mazda MX-5 mot history?

The Mazda MX-5 has a solid MOT history, known for its reliability and low maintenance costs. Regular checks and servicing can help ensure it remains in good condition.

How often does the Mazda MX-5 need an MOT?

In the UK, the Mazda MX-5 requires an MOT test every 12 months once it is three years old. It's important to keep track of the expiry date to avoid fines.

What common issues should I look for in a used Mazda MX-5?

Common issues include rust, especially in older models, and wear on the suspension components. It's advisable to have a thorough inspection before purchasing.

Can I check the MOT status of a Mazda MX-5 online?

Yes, you can check the MOT status of any vehicle, including the Mazda MX-5, on the UK government's official website. You will need the registration number to access the details.

What should I do if my Mazda MX-5 fails its MOT?

If your Mazda MX-5 fails its MOT, you will receive a list of issues that need addressing. You can either repair the car and retest it or consider whether it is worth fixing.

Are there any specific Mazda MX-5 models that are more reliable?

Generally, newer models of the Mazda MX-5 tend to have fewer issues due to improved engineering. However, regular maintenance is key to reliability across all models.

How can I prepare my Mazda MX-5 for its MOT?

To prepare your Mazda MX-5 for its MOT, check the lights, tyres, and fluid levels. Ensuring the car is clean and free of any obvious defects can also help.

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