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.
Factual proportion of owner complaints categorized by automotive subsystem in NHTSA records
47 owner complaints submitted to NHTSA ODI for this subsystem.
18 owner complaints submitted to NHTSA ODI for this subsystem.
13 owner complaints submitted to NHTSA ODI for this subsystem.
11 owner complaints submitted to NHTSA ODI for this subsystem.
Specific mechanical, electrical, and driver-assist defect symptoms identified via deterministic narrative analysis
4 complaint narratives describe this symptom.
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..."
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 → |
Complete distribution of consumer defect reports across all 36 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Injury Entries | 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 |
Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year
Key performance indicators, EPA fuel economy specs, powertrain variants, and summary ratings.
Official recall campaigns, safety defect descriptions, and manufacturer free remedy instructions.
NHTSA 5-Star NCAP crash test results, driver assistance systems, and rollover resistance ratings.
EPA fuel economy ratings, electric range, and annual energy cost benchmarks.
Direct, deterministic answers synthesized from verified United States government databases for the 2021 Mazda CX-30
In official NHTSA consumer records, the most frequently cited issue area for the 2021 Mazda CX-30 is Engine & Cooling, appearing in 47 records (47% of submitted filings).
Secondary reported categories include Driver Assistance & Safety Tech (18) and Electrical System (13).
AutoUtility does not issue subjective reliability scores or commercial ratings. In official United States government records, NHTSA tracks 100 consumer defect complaints and 2 safety recall campaigns for the 2021 Mazda CX-30.
Reviewing documented component complaint distributions, recall remedy notices, and active federal investigations provides an objective, evidence-based view of the vehicle's historical safety and defect record.
Among consumer complaint records on file with NHTSA for the 2021 Mazda CX-30, 10 filings cite a crash, 0 cite smoke or fire, and 7 report one or more injuries.
Incident entries represent consumer descriptions at the time of submission to federal authorities and do not establish mechanical causation or legal liability.
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database under 49 CFR Part 576.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.