Most common 2021 Mazda CX-30 problems
Share of the 101 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mazda CX-30 complaints by model year
Best CX-30 years: 2022. Years to avoid: 2025, 2024. Compare all years →
2021 Mazda CX-30 recalls (2)
Tires › Valve
Mazda North American Operations (Mazda) is recalling certain 2021 Mazda3 and CX-30 vehicles. Air may suddenly leak from the tire air valve.
Remedy: Mazda will notify owners, and dealers will replace all four tire air valves with new parts, free of charge. The recall began April 6, 2021. Owners may contact Mazda customer service at 1-800-222-5500 Option 4.
Structure › Body › Hatchback/liftgate
Mazda North American Operations (Mazda) is recalling certain 2020-2021 CX-30 vehicles. When fully opened, the power liftgate may partially lower unexpectedly when the vehicle is parked facing uphill on a slope.
Remedy: Mazda will notify owners, and dealers will update the power liftgate control module software and inspect the serial number of the power liftgate drive unit, replacing it if necessary, free of charge.
What 2021 Mazda CX-30 owners say
Engine & cooling all 49 →
The contact owns a 2021 Mazda CX-30. The contact stated that while the contact's wife was driving at an undisclosed speed, several unknown warning lights illuminated. The contact stated that the vehicle decelerated to 20 MPH. The contact's wife drove the vehicle to a safe location and parked the vehicle. The vehicle was towed to an independent mechanic, but the mechanic was unable to duplicate the failure. The contact stated that the independent mechanic reset the codes and the vehicle operated as intended; however, the failure recurred. The vehicle was taken to the dealer and the contact was informed that the battery needed to be replaced. The battery was replaced but the failure reoccurred. The vehicle was taken back to the dealer where it was diagnosed with a failed MAP sensor. The contact was informed that the MAP sensor needed to be replaced. …
The contact leased a 2021 Mazda CX-30. The contact stated that the vehicle had failed to start up after multiple attempts with several unknown warning lights illuminated on the instrument panel. The contact stated that an unauthorized independent tow company towed the vehicle to a dealer two hours away from her home and that the vehicle was stolen from the dealer's lot. A police report was filed. The contact then stated that the vehicle was recovered and returned to the same dealer. The battery was replaced, and the vehicle was towed to an auto body shop to repair the damage to the vehicle. The manufacturer was notified of the failure but offered no assistance. The vehicle had yet to be repaired. The failure mileage was 2,100. The VIN was not available.
Electrical system
The contact owns a 2021 Mazda CX-30. The contact stated that while at a stop sign, the vehicle was bouncing up and down. The contact mentioned that the failure recurred multiple times and only while the vehicle was stopped. The dealer was contacted but was unable to provide a diagnosis. The vehicle was not repaired. The manufacturer was not notified of the failure. In addition, while driving at approximately 8 mph, the brake assist warning light illuminated, and the brake assist applied independently while there was nothing in front of the vehicle. The approximate failure mileage was 3,500. As of November 5, 2021 the mileage was noted as 6,301 by Manchester Mazda. …
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 jumpstarting the vehicle. The contact was able to drive to her friend's residence. The contact then drove to her residence the following day. The contact stated while starting the vehicle, the vehicle jerked and the failure recurred. An unknown dealer was notified of the failure and provided an estimate for a diagnostic test. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 30,590.
Driver assistance
The contact owned a 2021 Mazda CX-30. The contact stated that her husband was driving 60 mph on cruise control and while approaching a traffic light he depressed the brake pedal but failed to deactivate the cruise control and stop the vehicle. The contact stated no warning light was illuminated. The driver steered to the right and crashed into another vehicle. The contact stated all the air bags did deploy. The driver sustained leisure on his back and both legs due to the air bag deployment. The contact sustained leisure on her head, her nose, her left ribs, hips, and both legs due to the air bag deployment. The contact stated they both sought medical attention at a near hospital. The contact did not know in detail the injuries of the other individuals but did know both individuals sought medical attention. A police report was filed. The vehicle was not drivable. …
The contact owns a 2021 Mazda CX-30. The contact stated that while at a stop sign, the vehicle was bouncing up and down. The contact mentioned that the failure recurred multiple times and only while the vehicle was stopped. The dealer was contacted but was unable to provide a diagnosis. The vehicle was not repaired. The manufacturer was not notified of the failure. In addition, while driving at approximately 8 mph, the brake assist warning light illuminated, and the brake assist applied independently while there was nothing in front of the vehicle. The approximate failure mileage was 3,500. As of November 5, 2021 the mileage was noted as 6,301 by Manchester Mazda. …
2021 Mazda CX-30 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.5L 4-cyl | 6-speed automatic | FWD | 25 / 33 / 28 |
| 2.5L 4-cyl | 6-speed automatic | 4WD | 24 / 31 / 26 |
| 2.5L 4-cyl turbo | 6-speed automatic | 4WD | 22 / 30 / 25 |
EPA ratings. Class: Small SUV.
Frequently asked questions
Is the 2021 Mazda CX-30 a good car?
There isn't enough complaint history for the CX-30 to compare model years reliably. So far owners have filed 101 complaints with NHTSA.
What is the most common problem with the 2021 Mazda CX-30?
The engine & cooling — 49 complaints, 49% of all complaints for this model year. Next are the electrical system (14) and driver assistance (12).
How many recalls does the 2021 Mazda CX-30 have?
There are 2 recalls for the 2021 Mazda CX-30, the most recent from February 22, 2021 (valve). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Mazda CX-30?
The best years by complaints, compared at the same age, are 2022. Years to avoid or approach with caution: 2025 and 2024. See the full Mazda CX-30 years comparison.
At what mileage do 2021 Mazda CX-30 problems happen?
The median mileage reported in complaints is about 5,000 miles; 100% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.