2024 Mazda CX-90: engine stalls while driving

Filed Aug 24, 2026 · Engine · FL

My vehicle experienced a total, premature radiator failure at 43,500 miles, after the manufacturer's factory warranty expired. The vehicle began leaking engine coolant rapidly. This creates a severe safety hazard, as a sudden loss of coolant leads to immediate engine overheating, potential engine stall, and catastrophic failure while driving at highway speeds, increasing the risk of a crash.A certified technician diagnosed the vehicle and provided video/photographic evidence confirming that the coolant leak is originating from a specific crack on the lower section of the driver's side radiator.This is a known, systemic manufacturing defect based on my research. Numerous other 2024 Mazda CX-90 owners on automotive forums have documented the exact same failure occurring in the exact same location on the lower driver-side radiator. The defect required a complete radiator replacement, forcing me to pay approximately $2,204 (with taxes and fees) out of pocket for a premature component failure that should safely last past 100,000 miles. I have digital photographic/video proof of the cracked unit from the service technician available for review.

Filed Jun 29, 2026 · Fuel system, Suspension · TN

The lower fuel pump is going out. It is a known issue with the car. I was driving out of town and the car started to stall. My steering has become ruggish while on the trip as well, and steering was complicated during heavy winds. The car has been inspected by dealer and both warning lights have been cleared. But the issues still remain.

Filed May 12, 2026 · Engine, Fuel system · IL

My 2024 Mazda CX-90 MHEV has experienced multiple life-threatening sudden engine stalls and a complete loss of motive power while driving in active traffic lanes. The first incident occurred on December 31, 2024, when the vehicle abruptly shut down with an "Engine Malfunction" dashboard alert. The vehicle was towed to an authorized Mazda dealership (Palatine, IL), where it was held for a week, but technicians stated they could not replicate the issue and returned the car to me as safe. On March 30, 2026, the exact same failure recurred. While driving, the engine suddenly shut off completely at a traffic intersection. After turning the vehicle off for 5 minutes, it was restarted and driven to another authorized Mazda dealership (Crystal Lake, IL) for specialized diagnostic scanning. The second dealership successfully retrieved stored diagnostic trouble code (DTC) P061B, which is directly linked to safety recall 24V‑815 (Loss of Drive Power from Software Errors). Crucially, the detailed diagnostic scan revealed that this code was historically stored with a timestamp dating back to December 2024. This proves that the safety defect was active and detectable during the first dealer visit 16 months prior, but was completely missed by the first dealership, leaving my family with an ongoing crash hazard. To address the failure, the dealership replaced the low-pressure fuel pump in the fuel tank and a mass airflow (MAF) sensor. However, Mazda Corporate customer experience has formally stated to me in writing that they are "not in a position to guarantee the concern will not reoccur." Because this safety-critical propulsion failure causes the vehicle to suddenly die in traffic and has a documented history of ineffective recall remediation, it poses an unresolved, severe crash risk. The vehicle is currently in my possession and available for inspection.

Filed Feb 26, 2026 · Engine, Fuel system · PA

The authorized dealer, Cochran Mazda, previously bypassed the vehicle’s hybrid system and returned the vehicle to us stating it was safe to operate and that we could disregard warning messages until a replacement hybrid battery became available. Prior to this, we had reported repeated drivability concerns, including jerking during operation. We were advised that this behavior was normal for hybrid vehicles. While awaiting a follow-up service appointment, the vehicle displayed a “Critical Engine Malfunction” warning and experienced a significant loss of power while traveling across the Liberty Bridge in Pittsburgh, PA. The vehicle would not accelerate beyond approximately 15 mph and then stalled out on the bridge. We activated hazard lights and were able to proceed slowly to a nearby parking lot, where the vehicle required towing. This incident created a hazardous traffic condition and raised significant safety concerns.

Filed Nov 18, 2025 · Engine · PA

i-Stop Malfunction. Engine not restarting after the hybrid system stalls engine at a stop.

Filed Oct 26, 2025 · Engine, Fuel system · CA

Upon starting the vehicle, on the dash there was a message "hybrid system malfunction" as well as "engine malfunction have the vehicle inspected". Upon driving it home, the same message appeared 10/24/25 as of today when the car starts now the only message that remains is "engine malfunction have the vehicle inspected" I have an appointment at Mazda on 10/30/25 for the vehicle to be inspected. This vehicle has already been taken to this location for two recalls. Today 10/26/25 I looked up my vin for any new recalls and there is an additional recall. Manufacturer Recall Number7825I the federal safety agency Recall Number25V-568 Summary When fuel containing ethanol is used, it may react with materials on the sending unit circuit board in the sub-tank. This reaction can create a buildup that interferes with the gauge function that may cause the display on the instrument cluster to read an incorrect fuel level. Safety Risk If the vehicle incorrectly indicates an inaccurate fuel level, there is a risk of running out of fuel while driving. This would result in an engine stall and the vehicle cannot be restarted, increasing the risk of a crash.

Filed Jun 2, 2025 · Engine, Transmission · FL

I’ve been experiencing power loss and surges/RPMs drop for nearly a month now while driving at various speeds. Each time, the iStop indicator comes on. This is a serious safety concern. I am extremely worried that the vehicle could stall, especially while my family is in the car, while driving on a busy highway. Undoubtedly, this issue presents a significant risk to the safety of drivers and passengers. I am requesting your assistance in initiating an official recall from the manufacturer for this component failure. Based on my research, I am not the only one experiencing this grave issue. Many others have reported similar problems on forums like Reddit, which is proof that this is a widespread issue.

Filed May 7, 2025 · Engine, Transmission · 16,000 miles · NY

The contact owns a 2024 Mazda CX-90. The contact received notification of the federal safety agency Campaign Number: 24V815000 (Power Train, Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The contact stated while driving at approximately 5 MPH, the vehicle stalled and shuddered abnormally. The message to "Please Pull Over to a Safe Place" was displayed on the instrument panel. The vehicle was towed to a dealer where it was diagnosed and determined that an unknown part needed to be replaced. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The failure mileage was approximately 16,000. Parts distribution disconnect.

Filed Apr 24, 2025 · Electrical, Engine · CT

Brought vehicle into Dealer for Service due to Check Engine Light being on and Notification of a Malfunction of the I-Stop System. Service Tech indicates that this is a known issue with the Hybrid Battery in these vehicles that could cause the vehicle to unexpectedly stall. This safety issue is significant enough that they would not let us take our car home while we wait for them to obtain a battery, which are currently on backorder. Pursuant to a conversation with a Mazda Customer Experience Representative this has been a known issue since at least January. We have not received any correspondence from Mazda regarding this issue. It would appear that a Bulletin or Recall is warranted for what appears to be a prevalent issue with significant safety impacts.

Filed Dec 25, 2024 · Transmission · OH

I am writing to formally raise a safety concern regarding my Mazda CX-90 Turbo S Premium Plus, which I purchased and currently have approximately 25,078 miles on. This vehicle is equipped with a mild hybrid 48V battery, which is not a full high-voltage battery. The vehicle has been at the dealer since December 9th for ongoing issues. On [XXX], I began experiencing multiple malfunctions, including the Mild Hybrid System Malfunction, Engine Malfunction, and iStop Malfunction (with the iStop malfunction indicator blinking). This is a serious safety concern. I was extremely worried that the vehicle could stall, especially while driving on a busy highway at high speeds. Both myself and my family felt fearful while driving the car. I believe this issue presents a significant risk to the safety of drivers and passengers. I am requesting your assistance in initiating an official recall from the manufacturer for this component failure. Based on my research, I am not the only one experiencing these issues—many others have reported similar problems on forums like Reddit, which suggests that this could be a widespread issue. Additionally, Mazda offers a 6-year/60,000-mile warranty on this hybrid battery. If the component fails after this period, the cost to replace it could reach $6,000, with the customer being responsible for a large portion of the expense. This is concerning, especially considering that if this part fails after 30,000 miles, the customer may be expected to bear up to 70% of the cost. It is frustrating to see such issues with a vehicle sold in the U.S., and I feel that companies should be held accountable for offering subpar products. For comparison, BMW offers a 100,000-mile warranty on similar components. I hope you will take immediate action to address this issue and help ensure that affected vehicles are recalled for repair or replacement. Thank you in advance for your attention to this matter. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)