Before you buy
This 2021 Mazda Cx 30 has 98 NHTSA complaints — top issue: Engine Problems.
A model-year pattern isn't the car in front of you. Check this exact VIN for accidents, open recalls, odometer rollback, and salvage titles.
Free preview · Full report from $12.95.
Based on NHTSA complaint data, the 2021 Mazda Cx 30 has 98 owner complaints, 10 crash-related complaints, and 2 recall campaigns on record. The most frequently reported component is Engine Problems. NHTSA reliability signal: Severe Issues.
- Make
- Mazda
- Model
- Cx 30
- Model year
- 2021
- NHTSA owner complaints
- 98
- Crash-related complaints
- 10
- Safety recall campaigns
- 2
- Top reported component
- Engine Problems
- Reliability signal
- Severe Issues
Common problems
Most common 2021 Mazda Cx 30 problems
Top owner-reported complaint areas and where they often appear.
Engine Problems
Electrical Faults
Forward Collision Avoidance: AEB
Complaint patterns center on Engine Problems, Electrical Faults, Forward Collision Avoidance: AEB. Use these as a pre-purchase inspection guide, then verify recall and damage history on the specific VIN.
Buyer verdict
Should you buy a used 2021 Mazda Cx 30?
This MAZDA CX 30 year shows a meaningful number of reported issues, so buyers should only proceed after a careful records review and inspection.
Model-year complaint trends can reveal recurring trouble spots before you spend money on inspections, financing, or repairs.
May Suit
This year may suit buyers who prioritize complete maintenance records and pass a pre-purchase inspection.
May Want to Avoid
Buyers who want a lower-risk ownership profile may prefer comparing nearby model years before committing.
Pre-purchase
What to check before buying a used 2021 Mazda Cx 30
Inspection Focus
- Inspect the most frequently reported complaint components on this model year
- Confirm recall repairs were completed and documented
- Check for accident damage, title brands, and mileage inconsistencies on the exact VIN
Before You Close the Deal
- Run a VIN check on the specific vehicle you are considering
- Verify all open recalls are completed at nhtsa.gov/recalls
- Request service records for the most-reported complaint components
- Have a certified mechanic inspect the vehicle before purchase
Check the exact car
Shortlist with model-year data. Decide with the exact VIN.
Before buying a used 2021 Mazda Cx 30, run a VIN history report to verify accidents, title brands, odometer records, theft checks, and open recalls for the exact vehicle.
AI verdict
What the complaint data suggests
Editorial interpretation of NHTSA public complaint data. Source: nhtsa.gov. Complaints are owner-submitted and do not confirm a defect. Methodology
The MAZDA CX 30 has 98 NHTSA complaints and 2 recalls on record. 10 complaints involve crash-related incidents. This data reflects owner-reported issues submitted to the National Highway Traffic Safety Administration.
Recall context: 2 recall campaigns are on record, so recall completion status should be confirmed on the exact VIN before purchase.
- 98 total complaints filed with NHTSA
- 2 federal recall campaigns
- 10 crash-related complaints on record
- Review NHTSA complaint history for the most-reported components
- Check recall completion status at nhtsa.gov/recalls
- Verify service records for frequently complained components
Full breakdown
All 2021 Mazda Cx 30 complaints by category
Every owner-reported complaint category filed with NHTSA for the 2021 Mazda Cx 30. Use this as a pre-purchase inspection checklist.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Engine Problems | 49 | — | — | — | |
| Electrical Faults | 13 | — | — | — | |
| Forward Collision Avoidance: AEB | 12 | 4 | — | — | |
| Uncategorized Issues | 11 | — | — | — | |
| Visibility/Wiper | 9 | — | — | — | |
| Brake System | 8 | 4 | — | — | |
| Transmission / Drivetrain | 8 | — | — | — | |
| Unintended Acceleration | 8 | 3 | — | — | |
| Airbag Malfunctions | 3 | 2 | — | — | |
| Fuel/Propulsion System | 3 | — | — | — | |
| Seat-Related Issues | 2 | — | — | — | |
| Hydraulic | 2 | 1 | — | — | |
| Lane Departure | 1 | — | — | — | |
| Wheel Issues | 1 | — | — | — | |
| Visibility | 1 | — | — | — | |
| Door Lock Issues | 1 | — | — | — | |
| Headlight/Taillight Failures | 1 | — | — | — | |
| Suspension Failures | 1 | — | — | — | |
| Seat Belt Issues | 1 | 1 | — | — | |
| Structural Problems | 1 | — | — | — | |
| Steering Defects | 1 | — | — | — |
Source: NHTSA Complaints Database. Complaint counts may exceed total complaints because one report can span multiple categories.
In their words
Real owner complaints
Read what owners actually reported to NHTSA for the 2021 Mazda Cx 30. Type a keyword (e.g. “transmission”, “stalling”, “brakes”) to filter.
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 windsh…
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 …
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 c…
While driving, on approach to a stop signal, at an intersection the car stopped moving. The display said engine malfunction, have inspected. The electronics and engine continued to operate, but the car would not move when gas pedal was depressed. I shut off and restarted my vehic…
The left and/or right side sun visor does not stay in the fully retracted position and may lower slightly due to its own weight. The problem is attributed to a broken connection point where the sun visor attaches to the vehicle. Impaired visibility, particularly in bright sunligh…
The I-Activesense camera disables all the time while driving. It disabled cruise control, LKA and LKA warning as well as auto high beams. While driving at highway speeds, when the vehicle drifts slightly over the line it does not get corrected nor do I receive ANY warning. It's a…
On December 13, 2025, my vehicle (2021 Mazda CX-30) was serviced at a Valvoline Instant Oil Change location. During service, the technician stated he was checking tire pressure and asked whether 36 PSI was acceptable. I agreed. When I pulled out of the bay, the tire pressure war…
Two issues A) my usb or display stop to work often I have reset to make it work again, look like loose electrical 2) many time it has also happened start key malfunction error I have jumped start, I have replaced battery same issue
The contact owns a 2021 Mazda CX-30. The contact stated that while driving at an undisclosed speed, the accelerator pedal was slightly depressed; however, the vehicle speed increased significantly independently. The contact stated that the failure occurred as the contact arrived …
As reported by others, Engine Malfunction light came on. Car running rough. Mazda dealer says corroded wiring harness and $5k to replace. They bypass the conventional repair and splice it in. Within a hour of driving after pick up, same engine malfunction light and rough running …
-Driver seatbelt retractor has failed. Will no longer retract and it is available for inspection. -Safety is compromised due to pretensioner will not function in the event of a collision. Seatbelt will not perform as designed. -I have not taken the vehicle into the dealer but wil…
The contact owns a 2021 Mazda CX-30. The contact stated that while operating the vehicle, the interior rear mirror loosened and eventually fell from the roof of the vehicle. The cause of the failure was not yet determined, and the vehicle was not yet repaired. Additionally, while…
The contact owned 2021 Mazda CX-30. The contact stated while attempting to park the vehicle in the parking garage at her workplace, the contact reversed and then straightened the steering wheel; however, after shifting to drive and attempting to drive 6-10 feet forward into the p…
Received a "LOW ENGINE OIL LEVEL” warning message before the regular oil change interval of 7,500. Light came on 11/20/24 after purchasing the vehicle from a Mazda dealership 8/10/24 (~3 months). Model and VIN were impacted by the Mazda Valve Stem Seal Settlement. This issue was …
Upon opening rear hatch, loud banging/knock developed that happened on every opening. Sounded as if it were damaging the body or latch. Did online research of problem and found through Mazda owners forum Mazda TSB #09-009/23. The TSB notes the rear latch has an "internal fault in…
For 4-5 weeks the car often would not start. Jump the battery and it would start. Run fine 1-2 days then require another jump. At end required jump nearly every time it was to be used. Presently at Mazda dealer. They confirm the problem. They cannot find the cause. Car has b…
The contact owns a 2021 Mazda CX-30. The contact stated while driving 65 MPH, the vehicle stalled. The messages "Engine Malfunction" and "Computer System Issues" were displayed. The contact was able to pull over to the side of the road. Another driver assisted the contact in jump…
Battery would be completely drained overnight if the doors are not locked.
While I was driving on I-90, I lost control of the acceleration of my vehicle. The vehicle was towed and has been diagnosed with a failed transmission! The car would not accelerate or it would accelerate in bursts or rapidly slow down. I was able to pull over and the car failed t…
Vehicle makes a noise on the driver side headlight when light is on. Once headlight is off, noise is gone.
Source: NHTSA Complaints Database. Real owner reports for the 2021 Mazda Cx 30.
Safety recalls
2021 Mazda Cx 30 recalls
2 campaignsNHTSA recall campaigns for the 2021 Mazda Cx 30. 2 recall campaigns are on record, so recall completion status should be confirmed on the exact VIN before purchase. Recalls are free to fix at authorized dealers, but completion status must be verified on the exact VIN.
STRUCTURE:BODY:HATCHBACK/LIFTGATE
TIRES:VALVE
Research more
Keep researching before you buy
Compare brands and categories, then check the exact car's history by VIN.
Questions
2021 Mazda Cx 30 buying FAQ
Buyer-focused answers based on real NHTSA complaint and recall data for this model year.
Is the 2021 Mazda Cx 30 reliable?▾
Severe Issues. NHTSA currently shows 98 owner complaints, 10 crash-related complaints, and 2 recall campaigns for this model year. This MAZDA CX 30 year shows a meaningful number of reported issues, so buyers should only proceed after a careful records review and inspection. Treat this as a model-year signal, then verify the exact vehicle's condition and history before purchase.
What are the most common problems with the 2021 Mazda Cx 30?▾
#1: Engine Problems (49 complaints). #2: Electrical Faults (13 complaints). #3: Forward Collision Avoidance: AEB (12 complaints)
At what mileage do problems start on the 2021 Mazda Cx 30?▾
Mileage data is not available or insufficient for this model year.
How safe is the 2021 Mazda Cx 30?▾
Complaint data is not the same as crash-test scoring, but it does highlight possible risk patterns. For the 2021 Mazda Cx 30, NHTSA complaints include 10 crash-related reports and 0 fire reports out of 98 total complaints. 13 injury reports are also on file. For controlled crash-test ratings, check nhtsa.gov/ratings.
Does the 2021 Mazda Cx 30 have any recalls?▾
Yes. 2 NHTSA recall campaigns affect the 2021 Mazda Cx 30. A major recall area is STRUCTURE:BODY:HATCHBACK/LIFTGATE. 2 recall campaigns are on record, so recall completion status should be confirmed on the exact VIN before purchase. Always verify open recalls by VIN because completion status varies by vehicle.
Should I buy a 2021 Mazda Cx 30?▾
This MAZDA CX 30 year shows a meaningful number of reported issues, so buyers should only proceed after a careful records review and inspection. Model-year complaint trends can reveal recurring trouble spots before you spend money on inspections, financing, or repairs. Pay extra attention to Engine Problems during inspection. Before committing, run a VIN history report to verify accidents, title brands, odometer records, and recall completion for the exact car.
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinSpector AI.
Wider context: See the full Mazda Cx 30 reliability report with year-by-year comparison.
Owner Reliability Rating
Rate the 2021 Mazda Cx 30 based on your ownership experience.
Add your rating:
Ratings are based on owner experience and are separate from NHTSA data shown above.
Before you buy
Check the exact vehicle history before you buy
Model-year complaints and recalls reveal patterns. A VIN report confirms whether the exact car has accident history, title brands, mileage issues, or open recalls.