2021 Mazda CX-30 Brakes Problems
- Complaints
- 8about this part
- Share
- 8%of 101 total for the year
- Median mileage
- 26,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the brakes of the 2021 Mazda CX-30, 8% of the 101 complaints for this model year. Where a mileage was given, the median is 26,500 miles. 4 of these say a crash was involved, according to the filers.
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.
“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 the Forward Collision Warning come on and then go out. Unfortunately, the brakes worked after that and the Mazda Collision Center cannot find anything wrong with the brakes. I note that the 2022 and 2023 models of the same car did have recalls related to the brakes. …”
NHTSA complaint #11743896, filed 2026-06“The accident occurred on the afternoon of Tuesday, November 14, which I reported to Enterprise, City of Falls Church, on the morning of November 15. Additionally, I provided to Enterprise email links to the many reports about breaking problems about the CX30 2021, 2022, and 2023 MAZA models and the reasons for their recall for repair. Here are the details about what happened. As I was trying to put the car in reverse from a standing position, the car, instead, lurched forward at great speed headed toward the Sun Trust bank. …”
NHTSA complaint #11555773, filed 2023-11“The automatic braking engaged without warning and without cause. There was nothing directly in front of the car that was a possible collision threat. I suffered a neck injury as a result of the force in which the car stopped. Fortunately the driver behind me was able to stop. The car was taken to the original Mazda dealer and I was told this is a problem with my car but that they had no permanent fix, nor the ability to permanently shut off this system available until corporate got back to them. They did not provide any paperwork and stated we will call you when we have something. …”
NHTSA complaint #11475522, filed 2022-07“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 parking space, the vehicle unintendedly accelerated and crashed into a pillar before coming to a stop. The contact stated that the engine had revved up, and the vehicle made an abnormally loud sound before the vehicle unintendedly accelerated. …”
NHTSA complaint #11635826, filed 2025-01, 31,000 miles“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 driving at an undisclosed speed, the message Critical Brake System Malfunction was displayed. The vehicle was taken to the local mechanic; however, the cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure, but no assistance was offered. …”
NHTSA complaint #11641757, filed 2025-02, 22,000 milesRelated service bulletins
- 11032103Apr 21, 2026This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory…
- 11026353Nov 26, 2025Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to…
- 11009644Oct 5, 2024Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to…
- 11008430Sep 26, 2024This information will give you the necessary knowledge to respond to customers concerns of Smart Brake Support (SBS) unintended braking. By educating the customer on the system…
- 11008429Sep 11, 2024Symptom 1: Some customers may complain about hearing a grinding noise and/or vibration occur when applying the brake. This is due to rust on the rear brake disc plate. The brake…
- 11006982Aug 29, 2024Symptom 1: Some customers may complain about hearing a grinding noise and/or vibration occur when applying the brake. This is due to rust on the rear brake disc plate. The brake…
- 11007009Aug 21, 2024Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to…
- 11003396Jun 7, 2024Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to…
Brakes: 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 complaintsTransmission and drivetrain
8 complaintsVehicle speed control
8 complaintsAir bags
3 complaintsFuel system
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 30, 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