Used buying checklist
Mazda Cx 30 reliability, common problems and used buying checks
A used Mazda Cx 30 looks better than average for reliability in UK MOT data: 4.7% of 1,288 tests failed, compared with 18.7% across all indexed models. A good example should have a clean MOT history for windscreen, wipers, and mirrors, tyres and wheels, and suspension and steering.
It can be, if the exact car has a clean history for windscreen, wipers, and mirrors, tyres and wheels, and suspension and steering.
Start with windscreen, wipers, and mirrors, tyres and wheels, and suspension and steering, then compare the car's mileage and recall record below.
Sources used: DVSA MOT tests (Apr 2026); vehicle recalls (Apr 2026); MOT fault wording (May 2025). MOT data does not capture every reliability issue, especially intermittent engine, gearbox or infotainment faults that do not appear during the test.
- 4.7% MOT failure rate
- Median tested mileage 18,946 miles
- 61 failed MOT tests analysed
Windscreen, wipers, and mirrors is the clearest area to check
Windscreen, wipers, and mirrors is the clearest named problem area in this model's MOT history (2.7 MOT notes per 100 tests). Example MOT phrases from this area include does not clear the windscreen effectively, items removed from drivers view prior to test, and damaged but not adversely affecting driver's view.
Example MOT phrases to search in the car's history:
- does not clear the windscreen effectively
- Items removed from drivers view prior to test
- damaged but not adversely affecting driver's view
- of an obligatory external mirror significantly affected by an obstruction
- Nail in tyre
- ball joint likely to become detached
- ball joint excessively worn
- across an axle
- ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt
- warning lamp indicates a fault
Focus on windscreen, wipers, and mirrors, tyres and wheels, and suspension and steering
The model's recorded failure rate is 4.7%, -14.0 percentage points compared with the average across all models. Use the seller questions below to check whether repeat MOT notes have actually been repaired.
- MOT tests analysed1,288 tests
- Median tested mileage18,946 miles
- Failed MOT tests61
Should you buy a used Mazda Cx 30?
95.3% of the MOT tests we analysed for this model passed. The model's recorded failure rate is 4.7%, -14.0 percentage points compared with the average across all models. This is a buying brief for the exact car in front of you: clean repeat history matters more than badge reputation.
- Repeat unresolved MOT notes for windscreen, wipers, and mirrors, tyres and wheels, and suspension and steering
- windscreen, wipers, and mirrors appearing across more than one MOT
- Any dangerous MOT failure on the exact car, especially if the same area appears again later
- No paperwork showing applicable recall work has been completed
- A seller who cannot explain MOT wording such as "does not clear the windscreen effectively"
It can be, if the exact car has a clean history for windscreen, wipers, and mirrors, tyres and wheels, and suspension and steering.
Start with windscreen, wipers, and mirrors, tyres and wheels, and suspension and steering, then compare the car's mileage and recall record below.
Windscreen, wipers, and mirrors is the clearest named problem area in the MOT history (2.7 MOT notes per 100 tests). These counts are issue notes, not failure rates, because a single MOT can list several faults.
Past 100k miles on the Mazda Cx 30, MOT records most often point to mixed mot checks.
The MOT failure rate rises from 4.5% at 0-3 years to 5.8% at 3-6 years. Compare the car with the nearest age range before treating a fault as normal wear or a warning sign. The average MOT failure rate across all models in the same dataset is 18.7%.
Start with windscreen, wipers, and mirrors, tyres and wheels, suspension and steering, and lights and electrical. The checklist on this page explains why each area is being recommended, what to inspect, and what to ask the seller.
3 relevant recall notices appear for this model. Treat them as safety checks to verify for the exact car, not as normal MOT wear.
What should I check first?
Start with windscreen, wipers, and mirrors, tyres and wheels, suspension and steering, and lights and electrical. The checklist on this page explains why each area is being recommended, what to inspect, and what to ask the seller. Each item shows whether it comes from MOT results, recall notices, or a standard used-car check.
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Windscreen, wipers, and mirrors Seen in MOT results
Windscreen, wipers, and mirrors is one of the most common MOT problem areas for this model (2.7 MOT notes per 100 tests).
What to check: Check windscreen damage, wiper operation, washers, mirrors, and demisting.
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Tyres and wheels Seen in MOT results
Tyres and wheels is one of the most common MOT problem areas for this model (1.6 MOT notes per 100 tests).
What to check: Check tyre age, tread depth, sidewall damage, wheel condition, and alignment wear.
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Suspension and steering Seen in MOT results
Suspension and steering is one of the most common MOT problem areas for this model (0.3 MOT notes per 100 tests).
What to check: Listen for knocks, check uneven tyre wear, and inspect steering play.
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Lights and electrical Seen in MOT results
Lights and electrical is one of the most common MOT problem areas for this model (0.2 MOT notes per 100 tests).
What to check: Check every lamp, warning light, horn, battery condition, and dashboard messages.
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Emissions, engine, and exhaust Seen in MOT results
Emissions, engine, and exhaust is one of the most common MOT problem areas for this model (0.1 MOT notes per 100 tests).
What to check: Check warning lights, smoke, exhaust leaks, recent emissions failures, and service history.
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Other MOT issues Seen in MOT results
Other MOT issues is one of the most common MOT problem areas for this model (66.1 MOT notes per 100 tests).
What to check: Read the MOT history closely and ask what has changed since the last test.
What changes with mileage?
Past 100k miles on the Mazda Cx 30, MOT records most often point to mixed mot checks.
Common MOT problem areas
Common faults: what usually fails on this model?
Windscreen, wipers, and mirrors is the clearest named problem area in the MOT history (2.7 MOT notes per 100 tests). These counts are issue notes, not failure rates, because a single MOT can list several faults.
Recall-related areas to verify
Official recall areas
Manufacturer recall notices for the Mazda Cx 30 mainly involve 3 areas: windscreen, wipers, and mirrors, mixed recall notices, and brakes. Treat each as something to verify on the specific car you are viewing; the recall table below shows the official notice text.
Mileage and age checks
Mileage changes: what starts showing up after high mileage?
Past 100k miles on the Mazda Cx 30, MOT records most often point to mixed mot checks. On lower-mileage cars, the most common named areas are windscreen, wipers, and mirrors, tyres and wheels, and suspension and steering.
| Mileage range | Tests | Vehicles | Failure rate (vs all models) | Median mileage |
|---|---|---|---|---|
| 0-50k | 1,260 | 1,135 | 4.4%-6.4 percentage points vs all models | 18,687 miles |
| 50-100k | 22 | 15 | 18.2%-2.5 percentage points vs all models | 58,697 miles |
| 150-200k | 2 | 1 | 50.0%+22.7 percentage points vs all models | 159,843 miles |
Problem areas by mileage
Past 100k miles on the Mazda Cx 30, MOT records most often point to mixed mot checks.
| Mileage range | Car areas most often recorded | Specific MOT defect examples |
|---|---|---|
| 0-50k |
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| 50-100k |
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| 150-200k |
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Fair comparisons: is this problem normal for its age?
The MOT failure rate rises from 4.5% at 0-3 years to 5.8% at 3-6 years. Compare the car with the nearest age range before treating a fault as normal wear or a warning sign. The average MOT failure rate across all models in the same dataset is 18.7%. The highest failure rate by age is 5.8% for 3-6 years cars, based on 259 tests.
| Age range | Tests | Vehicles | Failure rate (vs all models) | Median age |
|---|---|---|---|---|
| 0-3 years 2023–2026 reg. |
1,029 | 982 | 4.5%-4.0 percentage points vs all models | 3.0 years |
| 3-6 years 2020–2023 reg. |
259 | 232 | 5.8%-4.8 percentage points vs all models | 3.1 years |
Recall records and data freshness
Recall context: are there safety notices to know about?
3 relevant recall notices appear for this model. Treat them as safety checks to verify for the exact car, not as normal MOT wear.
| 2023-11-06 | On affected vehicles the images from the rear view / 360 cameras may not display. On affected vehicles the images from the rear view / 360� cameras may not display. Re-program the View Monitor Control (VMC) module with improved software. |
|---|---|
| 2021-04-12 | THE POWERED TAILGATE MAY PARTIALLY LOWER UNEXPECTEDLY FROM THE FULLY OPENED POSITION IN CERTAIN SITUATIONS The powered tailgate may partially lower unexpectedly from the fully opened position in certain situations. Inspect the production information and update the software of the power tailgate drive unit. Where necessary replace the power tailgate drive unit. |
| 2020-01-29 | VEHICLES MAY UNEXPECTEDLY STOP DUE TO INADVERTENT ACTIVATION OF THE AUTOMATED SMART BRAKE SUPPORT (SBS) SYSTEM Vehicles may unexpectedly stop due to inadvertent activation of the automated Smart Brake Support (SBS) system The vehicle control module is reprogrammed with modified software. |
Related searches
Common ways people look up the Mazda Cx 30. Each link runs the search and lands on the relevant section of this report.
Related reliability guides
See where this model sits against other Mazda reports by MOT failure rate and common problem area.
Compare high-confidence model reports across all makes.
Use the fleet mileage baseline before checking this model's own mileage table.
Compare this model's age pattern with the wider MOT baseline.
Sources used: DVSA MOT tests (Apr 2026); vehicle recalls (Apr 2026); MOT fault wording (May 2025). These are patterns from many MOT tests and recall notices. They help you decide what to inspect and what to ask; they do not certify the condition of one specific car.