2026 Mazda CX-30

Abrupt acceleration while pushing the gas pedal, erratic tachometer. Stays at the same speed for a while when gas is pushed at highway speeds then accelerates abruptly. Vibration and noise during park. During highway driving, merging and passing got risky. Bought the brand new car on 7 September, immediately followed by these issues, got the car towed to the dealership on 10 September. Still in service who confirmed most of the issues were reproduced. No warnings in the console. Today is 16th. The last time I was contacted by the service was 11th. Was not given a timeline.

NHTSA ID

11764594

Incident

Sep 8, 2026

I am reporting a severe electrical fire and system failure hazard resulting from unauthorized, dealership-installed aftermarket wiring modifications on a brand new 2026 Mazda CX-30. ​At the point of sale, Walker's Renton Mazda ([XXX]) spliced invasive, unauthorized aftermarket tracking/security wiring (suspected LoJack or similar) directly into the factory CAN-bus and main wiring harnesses. These modifications were done without consent, actively concealed during the pre-purchase inspection, and compromise the integrity of the vehicle's primary electrical architecture. ​Specifically, the physical installation bypassed standard safety protocols and compromised the vehicle's firewall insulation. As a military electromechanical engineering veteran, I recognize that unauthorized taps into a modern vehicle's high-speed data network and main power lines introduce immense risk of short circuits, signal logic failure, parasitic draw, and most critically, catastrophic electrical fires. ​Despite providing physical evidence of the tampered wiring, the dealership's management has denied the modifications exist and refused to remediate the safety hazard by unwinding the compromised vehicle. Mazda North American Operations (MNAO) has also refused to intervene under Case #XXX. The vehicle remains in my custody, but it is fundamentally compromised and unsafe due to the dealer's tampering with factory safety and electrical standards. I am requesting NHTSA investigate this dealership's practice of covertly installing unregulated electronics into new factory wiring harnesses, as it presents an unreasonable risk to motor vehicle safety. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11759622

Incident

Aug 10, 2026

The high beams would turn on by themselves, and no matter what I did, they wouldn't turn off. Each time the high beams turned on, I would have to fiddle with the control stick for a few minutes until the high beams turned off. Sometimes they would turn off for a second and then just turn back on. This is dangerous as it can blind other drivers. This has happened ever since I bought the car a few month ago. On August 11th the control stick broke off while I was trying to turn off the high beams. Now I have no control over the turn signals or the lights. I brought it to the dealer, but they refused to repair it for free. This is a brand new car which is under warranty.

NHTSA ID

11758126

Incident

Aug 11, 2026

I was driving my 2026 Mazda CX-30 in a parking lot and was pulling into a parking space at a very low speed. I lightly pressed the accelerator to move the car forward, but the car suddenly surged forward much faster than I intended or expected based on how lightly I had pressed the pedal. The sudden acceleration resulted in a collision and property damage. There were no warning lights, warning messages, or other dashboard alerts before or at the time of the incident. I do not know what specifically caused the car to accelerate this way. I am concerned that there may have been an issue with the accelerator/throttle response, engine controls, transmission, PCM, or another part of the powertrain. The vehicle has not yet been inspected by Mazda or an independent engineer specifically for this issue, so the cause has not been determined. It is currently as a collision center. Before the accident, I had also noticed that the vehicle's acceleration and pickup sometimes did not feel normal, although there were no warning lights or messages indicating a problem. I am reporting this because the car's unexpected acceleration at such a low speed created a serious safety concern. I would like the incident and vehicle to be investigated to determine whether a defect or malfunction contributed to the sudden acceleration. The vehicle is available for inspection.

NHTSA ID

11757325

Incident

Aug 13, 2026

This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA-038/26 06/15/26 DESCRIPTION Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote functions inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Index MAZDA CONNECT 2 Center Display Status Icon MAZDA CONNECT 3 Center Display Status Icon Remote Engine Start Will Not Function Remote Engine Start Function Will turn engine OFF Customer Subscription Status TCU Communication Line Status

This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red text. SA-039/26 06/15/26 Mazda Connect Symptom Troubleshooting DESCRIPTION Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.

This Service Alert supersedes the previously issued bulletin(s) listed below. The changes are noted in Red text. SA-006/23 01/23/23 DESCRIPTION Some customers may complain about the infotainment system and/or the MyMazda App showing incorrect clock and/or tire pressures and/or tire pressure missing. This may be caused by: Incorrect calendar entry (month/day/year) after a battery disconnect Infotainment system software update. BCM TPMS unlearn during vehicle storage or transport. Wheel/Tire change REPAIR PROCEDURE This can be corrected by the customer driving the vehicle for a day or two so that the following will occur.

DESCRIPTION Some customers may complain that the Adaptive LED Headlights (ALH) aim upward for several seconds just before the vehicle comes to a stop during nighttime driving. This is caused by improper control logic of the ALH. To eliminate this concern, the control software of the ALH has been modified. REPAIR PROCEDURE 1. Verify the customer concern. 2. Reprogram the ALH with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic And Repair Software (MDARS). Refer to MDARS ECU Reprogramming Procedure.

DESCRIPTION Some vehicles may continue to display the recall notification "IMPORTANT NOTICE. VIEW VEHICLE STATUS MONITOR FOR DETAILS" on the center display even after the recall has been completed. NOTE: Once the warranty claim for the recall campaign is approved by Mazda Japan, the recall notification will be automatically removed via Connected Services on the following day or later. This condition may occur if the Connected Services subscription was canceled while the recall notification was still active. ACTION TO BE TAKEN If you encounter the situation above, use MDARS to manually remove the center display recall notification. Note: MDARS can only remove the recall notification when MCVV shows no CV contract.

This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-012/26 04/17/26, 03/04/26 and 02/26/2026 DESCRIPTION Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode (OTP) may fail. Connected Vehicle Remote functions may fail. The following DTC's may be stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT