What breaks most · 2020 to 2026 model years
Mazda CX-30 problems by year
Owners have filed 247 safety complaints with NHTSA about the Mazda CX-30 across model years 2020 to 2026. One year stands out: 2021 for engine complaints. The quietest years are 2023, 2024 and 2020.
- Years to check closely: 2021
- Fewest complaints: 2023, 2024, 2020
- Complaints on file
- 2472020 to 2026, all trims
- Worst year
- 2021100 complaints
- Crashes reported
- 251 fires · 21 injuries · 0 deaths
- Typical failure mileage
- 5kMedian where owners gave mileage
- Recall campaigns
- 10Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 33 | 1 | 3 | Unknown or other (9) | |
| 100 | 10 | 2 | Engine (49) | |
| 33 | 4 | 1 | Engine (9) | |
| 23 | 5 | 1 | Brakes (7) | |
| 30 | 2 | 2 | Forward collision system (9) | |
| 25 | 2 | 1 | Electrical system (11) | |
| 3 | 1 | 0 | Unknown or other (1) |
What fails on the 2021 Mazda CX-30
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| EngineEngine gaskets and seals | 49% |
49 | 0 | Shop engine parts for the 2021 Mazda CX-30 |
| Electrical systemAlternators, starters and ignition | 13% |
13 | 0 | Shop electrical system parts for the 2021 Mazda CX-30 |
| Forward collision systemRadar and camera sensors | 12% |
12 | 4 | Shop forward collision system parts for the 2021 Mazda CX-30 |
| Unknown or other | 10% |
10 | 0 | — |
| Wipers and visibilityWiper motors and blades | 9% |
9 | 0 | Shop all wipers and visibility parts, not filtered to this vehicle |
| Speed control and throttleThrottle and pedal sensors | 8% |
8 | 3 | Shop all speed control and throttle parts, not filtered to this vehicle |
| Powertrain and transmissionTransmission parts | 8% |
8 | 0 | Shop all powertrain and transmission parts, not filtered to this vehicle |
| BrakesBrake pads, rotors and calipers | 6% |
6 | 3 | Shop brakes parts for the 2021 Mazda CX-30 |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
-
Excessive oil consumption. Regularly have a low oil warning come up about 6000 kms after an oil change. Oil is always low when checked.
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 6, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which Mazda CX-30 years have the most problems?
By NHTSA complaint volume, 2021 carries the most filings on the Mazda CX-30. The 2021 alone has 100 complaints, led by engine.
What is the most common Mazda CX-30 problem?
On the 2021 model year, the most-reported component is engine with 49 complaints. The table above lists the top components for every year.
At what mileage do Mazda CX-30 problems start?
The median mileage at failure across all Mazda CX-30 complaints that include mileage is about 5,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.