MOT failure rates
Mazda CX-30 MOT failure rates: what fails, what to fix
What the DVSA MOT data shows for the Mazda CX-30. The most common failure categories and what each one typically costs to put right.
Updated 4th September 2026 DVSA data: Across 20,411 recorded MOT tests, 6.3% failed.

More on the Mazda CX-30
TL;DR
Mazda CX-30 owners should be aware of common MOT failure rates, which often include issues with brakes, suspension, lighting, and emissions. Regular maintenance can help prevent these problems.
Common MOT Failures
The Mazda CX-30 has several common MOT failure categories, primarily involving brakes, suspension, lighting, and emissions. These failures can lead to significant repair costs if not addressed promptly. For instance, worn brake pads can reduce stopping power, while suspension issues can affect handling and comfort, making regular inspections essential.
Age-by-Age Fail Rate
The fail rate for the CX-30 typically increases as the vehicle ages. Vehicles around 3-5 years old show the highest fail rates due to wear and tear on components like brakes and suspension. Regular maintenance can help mitigate these issues, so owners should be vigilant as their vehicles approach the three-year mark.
Cost of Repairs
Repair costs vary depending on the failure type. Emissions-related repairs may also fall within this range, so it is wise for owners to budget for these potential costs.
Quick Fixes vs Structural Issues
Many common failures have quick fixes. For example, replacing a blown bulb or adjusting a loose suspension component can be straightforward and inexpensive. However, structural issues, like significant suspension damage, can lead to costly repairs and should be addressed immediately to avoid further damage and safety risks.
Preparing for Your MOT
To avoid surprises during your MOT, consider a pre-test check. Regularly inspect brakes, lights, and emissions systems. Addressing minor issues early can prevent larger problems down the line. Some owners find it beneficial to take their vehicle to a trusted mechanic for a pre-MOT inspection to uncover hidden issues.
What people are asking
What year to stay away from Mazda CX-30?
If you’re shopping for a CX-30, especially used, knowing which model years and trims have fewer issues can help. Prefer 2022-2024 non-turbo models for lower chances of oil consumption or mechanical issues. Earlier turbo trims, particularly from 2021, have more reported problems, so it is advisable to approach these models with caution.
Is a used Mazda CX-30 a good buy?
With routine servicing and care, a used Mazda CX-30 can easily surpass 150,000 miles. Mazda’s reputation for building durable, low-maintenance vehicles enhances the CX-30’s long-term value, making it a solid choice for buyers who plan to keep their SUV for years. Many owners appreciate the blend of performance and comfort in this model.
Is the Mazda CX-30 a reliable SUV?
Reliability is a strong suit for the Mazda CX-30, though it’s not flawless. This reliability is often reflected in owner satisfaction, with many praising the vehicle’s performance.
Does the Mazda CX-30 have rust issues?
Some models from 2020-2022 have reported rust streaks appearing on the doors from under the mirror housing. This issue has been noted by several owners and may require attention if you notice any signs of corrosion. Regular inspections can help catch these problems early.
What owners say
Many Mazda CX-30 owners express satisfaction with their vehicles, particularly regarding reliability. Discussions reveal that owners appreciate the CX-30’s ability to handle daily driving while maintaining a stylish appearance. However, some users have noted concerns about the fragility of the paint, especially in popular colours like Soul Red, which can chip easily.
Additionally, automatic transmission shifting problems have been mentioned by users, particularly those who have driven their CX-30 for significant mileage, suggesting that early maintenance can be crucial.
Value is another common theme among owners. This sentiment is echoed in discussions about the vehicle’s resale value, with many believing that the CX-30 holds its worth well compared to competitors. Many users highlight the CX-30’s long-term value, stating that with proper care, it can serve reliably for many years.
However, some owners do mention drawbacks, such as road noise and visibility issues. This is something potential buyers should consider when evaluating the CX-30. Feedback indicates that while the driving experience is generally enjoyable, some owners find that cabin noise can be more pronounced than expected, especially at higher speeds.
Mazda CX-30 recall record
3 recalls have been issued for the Mazda CX-30, between 2020 and 2023.
On affected vehicles the images from the rear view / 360 cameras may not display.
R/2023/312Issued 6 November 2023
On affected vehicles the images from the rear view / 360� cameras may not display.
Remedy:Re-program the View Monitor Control (VMC) module with improved software.
Affects cars built Jun 2023 to Sept 2023
THE POWERED TAILGATE MAY PARTIALLY LOWER UNEXPECTEDLY FROM THE FULLY OPENED POSITION IN CERTAIN SITUATIONS
R/2021/077Issued 12 April 2021
The powered tailgate may partially lower unexpectedly from the fully opened position in certain situations.
Remedy:Inspect the production information and update the software of the power tailgate drive unit. Where necessary replace the power tailgate drive unit.
Affects cars built Apr 2019 to Oct 2020
VEHICLES MAY UNEXPECTEDLY STOP DUE TO INADVERTENT ACTIVATION OF THE AUTOMATED SMART BRAKE SUPPORT (SBS) SYSTEM
R/2020/009Issued 29 January 2020
Vehicles may unexpectedly stop due to inadvertent activation of the automated Smart Brake Support (SBS) system
Remedy:The vehicle control module is reprogrammed with modified software.
Affects cars built Apr 2019 to Oct 2019
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 CX-30 MOT record
From 20,411 recorded MOT tests, 6.3% failed.
| Registered | Tests | Failed | Median mileage |
|---|---|---|---|
| 2023 | 246 | 3.3% | 18,794 mi |
| 2022 | 5,943 | 5.1% | 21,902 mi |
| 2021 | 7,884 | 6.2% | 27,924 mi |
| 2020 | 6,108 | 7.7% | 32,395 mi |
| 2019 | 230 | 12.6% | 35,027 mi |
Most common reasons for failure
- Tyre tread depth not in accordance with the requirements31.2%
- a brake lining or pad worn below 1.5mm20.6%
- A tyre seriously damaged19.7%
- Brake disc or drum excessively weakened, insecure or fractured15.7%
- A shock absorber damaged to the extent that it does not function or showing signs of severe leakage12.7%
Figures cover every Mazda CX-30 tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.
Mazda CX-30 official figures
Median across 67 variants on sale, petrol electric.
- Combined economy
- 49.6 mpg
- WLTP median across variants
- CO2 emissions
- 129 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 are the most common MOT failure reasons for the Mazda CX-30?
The most common failure reasons include brakes, suspension, lighting, and emissions.
What is the typical age-by-age fail rate for the CX-30?
Fail rates generally increase with age, peaking around 3-5 years old.
Are there quick fixes for CX-30 MOT failures?
Yes, many issues like bulb replacements are quick and inexpensive.
What structural issues should I be aware of?
Structural issues are less common but can involve serious costs, such as suspension repairs.
What year to stay away from Mazda CX-30?
Prefer 2022-2024 non-turbo models for lower chances of oil consumption or mechanical issues. Earlier turbo trims, especially around 2021, have more reported problems.
Is a used Mazda CX-30 a good buy?
With routine servicing and care, a used Mazda CX-30 can easily surpass 150,000 miles. Mazda's reputation for building durable, low-maintenance vehicles enhances the CX-30's long-term value.
Does the Mazda CX-30 have rust issues?
Some models from 2020-2022 have reported rust streaks appearing on the doors from under the mirror housing.
Sources
- DVSA anonymised MOT tests and results (Open Government Licence v3.0)
- VCA new car fuel consumption and emissions data (Open Government Licence v3.0)
- DVSA vehicle safety recalls (Open Government Licence v3.0)