2021 Mazda CX-30 Fuel system Problems
- Complaints
- 3about this part
- Share
- 3%of 101 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the fuel system of the 2021 Mazda CX-30, 3% of the 101 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Low engine oil light is on again, I had one at 4600 miles and keep happening every 5-6000 miles. I had 7!! oil changes on a car that is 2.5 years old and it is at 29000 miles. I am sitting at the dealership and they are telling me nothing is wrong and despite of the valve stem cap replacement available they are not willing to replace it. In addition I had my battery die and needed to be replaced at 23 months after purchasing a brand new car - due to a faulty system. This is getting extremely upsetting. And dealearships do not care.”
NHTSA complaint #11589759, filed 2024-05Related service bulletins
- 11033445May 2, 2026This SA supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-011/25 10/16/25 and 02/27/25 DESCRIPTION Some customers will report that their fuel…
- 11007024Aug 15, 2024Some customers will report that their fuel door was stuck closed and would not open to refuel the vehicle. Follow the repair steps below unless the conditions outlined in TSB…
Fuel system: other model years
Other parts of the 2021 Mazda CX-30
49 complaintsElectrical system
14 complaintsForward collision avoidance
12 complaintsVisibility (wipers, defrost, mirrors)
11 complaintsOther or unknown
10 complaintsBrakes
8 complaintsTransmission and drivetrain
8 complaintsVehicle speed control
8 complaintsAir bags
3 complaintsSeats
2 complaintsExterior lighting
1 complaintsLane departure
1 complaints
← All problems reported for the 2021 Mazda CX-30
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology