AutoUtility currently tracks 100 official NHTSA owner defect complaints for the 2021 Mazda CX-30. Engine & Cooling issues are the most frequently reported category, appearing in 47 complaints (47% of submitted records). Among these NHTSA complaint records, 10 filings cite a crash, 7 report one or more injuries.
- • Total NHTSA Complaints: 100 reports
- • #1 Reported Problem Area: Engine & Cooling (47 reports • 47% of submitted complaints)
- • Secondary Problem Areas: Driver Assistance & Safety Tech (18), Electrical System (13)
- • Crash-Citing Complaints: 10 filings
- • Fire-Citing Complaints: 0 filings
- • Complaints Reporting Injuries / Fatalities: 7 injury filings • 0 fatality filings
Most Reported Problems for 2021 Mazda CX-30
Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records
Engine & Cooling
Driver Assistance & Safety Tech
Electrical System
Visibility, Wipers & Glass
Brakes & Traction Control
Symptoms Mentioned in NHTSA Owner Reports for 2021 Mazda CX-30
Specific mechanical, electrical, and driver-assist defect symptoms identified via deterministic narrative analysis
AutoUtility uses deterministic phrase matching to identify recurring symptom descriptions within consumer-submitted NHTSA complaint narratives.
Engine Coolant Intrusion / Oil Leak
Recent NHTSA Owner Reports for 2021 Mazda CX-30
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"The climate control system suffered a sudden, complete failure due to an engineering defect documented in Mazda Technical Service Bulletin (TSB) ID: MC-10[PHONE REDACTED]. The factory evaporator core leaked refrigerant rapidly starving the A/C compressor of essential lubricating oil. This caused..."
"Excessive oil consumption. Regularly have a low oil warning come up about 6000 kms after an oil change. Oil is always low when checked."
"The vehicle experienced a premature internal A/C failure, resulting in a total loss of climate control refrigerant. Because the A/C system failed, the vehicle's windshield defroster completely stopped removing humidity and moisture from the cabin air. This caused the front windshield to instantly..."
"On June 3rd, 2026, about 1:15 PM, I braked in the rain because there was a stopped car in front of me. The brakes did not work; the Automatic Emergency brakes did not work; the Forward Collision Warning did not work and I hit the car in front of me causing a 3 car accident. As I hit the car I saw..."
"Following a recent inspection at Perry Mazda in Santa Barbara, my vehicle was diagnosed with a failed clock spring mechanism causing airbag malfunction warnings. Clock spring failure under 70K miles on a 2021 vehicle is premature and suggests a defect rather than normal wear. I contacted Mazda..."
Complaint History for Mazda CX-30
Reported defect complaint volume across sibling model years (2020–2026)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2020 Mazda CX-30 | 32 | 1 | 3 | View 2020 Problems → |
| 2021 Mazda CX-30 Current Page | 100 | 10 | 2 | Current |
| 2022 Mazda CX-30 | 33 | 4 | 1 | View 2022 Problems → |
| 2023 Mazda CX-30 | 23 | 5 | 1 | View 2023 Problems → |
| 2024 Mazda CX-30 | 29 | 2 | 2 | View 2024 Problems → |
| 2025 Mazda CX-30 | 25 | 2 | 1 | View 2025 Problems → |
| 2026 Mazda CX-30 | 0 | 0 | 0 | View 2026 Problems → |
Detailed NHTSA Component Breakdown for 2021 Mazda CX-30
Complete distribution of consumer defect reports across all 36 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Reported Injury Entries | Reported Fatality Entries |
|---|---|---|---|---|---|
| Engine NHTSA category: ENGINE | 35 | 0 | 0 | 0 | 0 |
| Visibility & Wipers NHTSA category: VISIBILITY/WIPER | 8 | 0 | 0 | 0 | 0 |
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 5 | 0 | 0 | 0 | 0 |
| Electrical System NHTSA category: ELECTRICAL SYSTEM | 4 | 0 | 0 | 0 | 0 |
| SERVICE BRAKES,FORWARD COLLISION AVOIDANCE | 4 | 3 | 0 | 0 | 0 |
| Air Bags NHTSA category: AIR BAGS | 3 | 2 | 0 | 3 | 0 |
| Forward Collision Avoidance NHTSA category: FORWARD COLLISION AVOIDANCE | 3 | 1 | 0 | 4 | 0 |
| ELECTRICAL SYSTEM,ENGINE | 2 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,FORWARD COLLISION AVOIDANCE | 2 | 0 | 0 | 0 | 0 |
| ENGINE,FUEL/PROPULSION SYSTEM | 2 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ENGINE | 2 | 0 | 0 | 0 | 0 |
| POWER TRAIN,UNKNOWN OR OTHER,ENGINE | 2 | 0 | 0 | 0 | 0 |
| Seats & Restraints NHTSA category: SEATS | 2 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES | 2 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,ENGINE | 2 | 0 | 0 | 0 | 0 |
| Vehicle Speed Control NHTSA category: VEHICLE SPEED CONTROL | 2 | 2 | 0 | 1 | 0 |
| ELECTRICAL SYSTEM,EXTERIOR LIGHTING | 1 | 0 | 0 | 0 | 0 |
| Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| LANE DEPARTURE,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| Doors, Latches & Locks NHTSA category: LATCHES/LOCKS/LINKAGES | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM,ENGINE | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE | 1 | 0 | 0 | 0 | 0 |
| Seat Belts NHTSA category: SEAT BELTS | 1 | 1 | 0 | 3 | 0 |
| SERVICE BRAKES, HYDRAULIC,VEHICLE SPEED CONTROL | 1 | 1 | 0 | 1 | 0 |
| SERVICE BRAKES, HYDRAULIC,VISIBILITY | 1 | 0 | 0 | 0 | 0 |
| STEERING,ELECTRICAL SYSTEM,ENGINE | 1 | 0 | 0 | 0 | 0 |
| Structure & Body NHTSA category: STRUCTURE | 1 | 0 | 0 | 1 | 0 |
| Suspension NHTSA category: SUSPENSION | 1 | 0 | 0 | 0 | 0 |
| VEHICLE SPEED CONTROL,ENGINE | 1 | 0 | 0 | 0 | 0 |
| VEHICLE SPEED CONTROL,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| VEHICLE SPEED CONTROL,UNKNOWN OR OTHER,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| Visibility / Glass NHTSA category: VISIBILITY | 1 | 0 | 0 | 0 | 0 |
| VISIBILITY/WIPER,VISIBILITY | 1 | 0 | 0 | 0 | 0 |
| Wheels & Hubs NHTSA category: WHEELS | 1 | 0 | 0 | 0 | 0 |
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.