MOT failure rates

Mazda MX-30 MOT failure rates: what to expect

What fails on a Mazda MX-30 at MOT, how often, and what each fix typically costs.

Updated 4th September 2026 DVSA data: Across 2,782 recorded MOT tests, 7.2% failed.

Mazda MX-30
Image via Wikipedia, CC-licensed.

The Mazda MX-30 is generally a reliable vehicle, but like any car, it can encounter issues that may lead to an MOT failure. Common failures include problems with the brakes, lights, and suspension components. Addressing these issues can vary in cost, but being aware of them can help you maintain your vehicle effectively.

Brake System Failures

Brake system failures are among the most common reasons for an MOT failure in the Mazda MX-30. Issues can arise from worn brake pads, damaged discs, or fluid leaks. If your brakes are not functioning properly, it can lead to serious safety concerns.

Regular checks and timely replacements can help avoid these expenses.

Lighting Issues

Lighting problems are another frequent cause of MOT failures for the Mazda MX-30. This can include faulty headlights, brake lights, or indicators. A blown bulb or a malfunctioning light can easily lead to a failed test, as proper visibility is crucial for safe driving.

Regularly checking your lights can help you catch these issues before your MOT.

Suspension and Steering Problems

The suspension and steering systems of the Mazda MX-30 are vital for handling and ride comfort. Common issues include worn shock absorbers, damaged springs, or play in the steering components. These problems can significantly affect the vehicle’s performance and safety.

Regular maintenance can help prolong the life of these components.

Tyre Condition and Tread Depth

Tyres are critical for safety and performance, and their condition is a key factor in MOT assessments. Insufficient tread depth or damage to the sidewalls can lead to a failed MOT. The legal minimum tread depth in the UK is 1.6mm, but it is advisable to replace tyres when they reach 3mm for optimal safety.

If multiple tyres need replacing, costs can add up quickly. Regularly inspecting your tyres for wear and damage can help you avoid unexpected expenses during your MOT.

Exhaust Emissions

The Mazda MX-30 is designed to be environmentally friendly, but issues with the exhaust system can still lead to MOT failures. Problems can include leaks, a malfunctioning catalytic converter, or issues with the oxygen sensors. These failures can increase emissions beyond acceptable levels.

Ensuring your exhaust system is in good condition can help maintain compliance with emissions standards.

Windshield and Wiper Failures

Visibility is crucial for safe driving, making windshield and wiper issues significant in MOT assessments. Common problems include cracks in the windshield, ineffective wipers, or damaged washer systems. Any obstruction to the driver’s view can lead to a failed MOT.

Regularly checking your wipers and windshield can help you avoid these issues.

By being aware of these common MOT failures and their associated costs, Mazda MX-30 owners can take proactive steps to maintain their vehicles. Regular maintenance and timely repairs can not only help you pass your MOT but also ensure a safer driving experience.

Mazda MX-30 recall record

2 recalls have been issued for the Mazda MX-30, between 2021 and 2023.

  1. Affected vehicles cannot be driven due to an error within the on-board charger which causes the vehicle to wrongly detect it is connected to an EV charge cable.

    R/2023/159

    Issued 30 May 2023

    Affected vehicles cannot be driven due to an error within the on-board charger which causes the vehicle to wrongly detect it is connected to an EV charge cable.

    Remedy:Reprogram the software of the on-board charger.

    Affects cars built Apr 2022 to Mar 2023

  2. THE FRONT PASSENGER MAIN FRONTAL AIR BAG COULD SPLIT AT THE SEAM AND MAY NOT DEPLOY CORRECTLY WHEN ACTIVATED IN A COLLISION

    R/2021/154

    Issued 27 April 2021

    The front passenger main frontal airbag could split at the seam and may not deploy correctly when the airbag is activated in a collision.

    Remedy:Replace the airbag with an improved version

    Affects cars built May 2020 to Nov 2020

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-30 MOT record

From 2,782 recorded MOT tests, 7.2% failed.

MOT pass and failure rates by year of first registration
RegisteredTestsFailedMedian mileage
20228555.5%18,197 mi
20211,9278.0%23,732 mi

Most common reasons for failure

  1. Tyre tread depth not in accordance with the requirements37.8%
  2. A tyre seriously damaged23.2%
  3. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage14.8%
  4. Brake disc or drum excessively weakened, insecure or fractured14.8%
  5. Wiper blade missing or obviously not clearing the windscreen9.4%

Figures cover every Mazda MX-30 tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Mazda MX-30 official figures

Median across 20 variants on sale, electricity / petrol.

Combined economy
37.2 mpg
WLTP median across variants
CO2 emissions
172 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-30 mot?

The Mazda MX-30 mot refers to the vehicle's Ministry of Transport test, which checks its roadworthiness and safety. It is essential for ensuring that the car meets UK standards for driving on public roads.

How often do I need to get my Mazda MX-30 mot?

In the UK, you must have an mot test done every year once your Mazda MX-30 is three years old. It is important to keep up with this requirement to ensure your vehicle remains legal and safe to drive.

What happens if my Mazda MX-30 fails the mot?

If your Mazda MX-30 fails the mot, you will receive a list of issues that need to be addressed. You must fix these problems and have the vehicle retested before it can be legally driven.

Can I drive my Mazda MX-30 if the mot has expired?

No, you cannot legally drive your Mazda MX-30 if the mot has expired, unless you are taking it to a pre-booked mot appointment. Driving without a valid mot can result in fines and penalties.

Where can I get my Mazda MX-30 mot done?

You can get your Mazda MX-30 mot done at any authorised mot testing centre in the UK. It is advisable to choose a reputable garage to ensure a thorough inspection.

How can I prepare my Mazda MX-30 for the mot?

To prepare your Mazda MX-30 for the mot, check the lights, brakes, tyres, and fluid levels. It is also a good idea to ensure that there are no warning lights on the dashboard before the test.

What documents do I need for the mot test?

You will need to bring your Mazda MX-30's V5C registration certificate and any previous mot certificates. Having these documents ready can help streamline the testing process.

Sources