Mazda CX-90 stalling problems

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 Jul 4, 2026 · Transmission · NC

My car is literally stalling out on me. It started by sputtering when I put my foot on the gas a week or so ago. Then today It literally started just losing power while driving. It’s not throwing any codes but that’s super dangerous and this car is only a year old. I am extremely concerned for my safety.

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 Mar 27, 2026 · Engine · GA

I am submitting this complaint regarding my 2025 Mazda CX-90 PHEV, leased in April 2025. Since early in my lease, the vehicle has had ongoing drivability issues that have worsened over time and now present a serious safety concern.From the beginning, the vehicle exhibited jerking and hesitation while driving. Initially minor, this has become more frequent and now includes stalling behavior during normal driving conditions, including acceleration and traffic flow. This creates a risk of collision, especially when merging or at intersections.Approximately six months into my lease, the radiator failed and had to be replaced. More recently, while driving, multiple warnings appeared at once: Hybrid System Malfunction, Battery System Malfunction, Oil Monitoring Malfunction, and i-ACTIVSENSE partially disabled. These warnings were documented.Two weeks prior, the dealership reported no diagnostic codes. However, on my most recent visit, I was told via video that the active air shutter is now the issue. The required part is on backorder until August. I was told I could either remain in a non-comparable loaner while still making full lease payments, or continue driving the vehicle in its current condition until the part arrives. I find this unacceptable given the safety concerns.I expressed that I do not feel safe driving this vehicle, but the service advisor stated this is “not a safety concern.” I disagree. A vehicle that jerks, hesitates, or stalls while driving, combined with multiple system malfunctions and disabled safety features, presents a clear safety risk.I also disclosed prior to leasing that I do not have access to charging. I was told this would not be an issue. I am now being told that not charging the vehicle may be contributing to the problem. Service advisors have also indicated these vehicles have known hybrid battery issues.I no longer feel safe driving this vehicle and am concerned for my safety and my family’s safety.

Filed Mar 16, 2026 · Driver assistance · CA · crash

On March 14, 2026, I was attempting to turn left into a parking stall within a busy shopping center lot when my vehicle suddenly accelerated unexpectedly. I lost all control of both the steering and the braking systems. This resulted in my vehicle striking a parked car to my left, jumping a cemented planter border, and coming to rest in the adjacent parking stall. Fortunately, the other vehicle was unoccupied, and both my passenger and I were uninjured. Local law enforcement was contacted; however, they indicated the policy officers will not be sent to the seen to file a report as there were no injuries. They did assist in identifying the owner of the other vehicle. I have initiated a claim with my insurance carrier, American National Property and Casualty Co (Claim #10401408), and have opened a case with Mazda Corporate (Case #00428640). Mazda has indicated that they require a report from my insurance provider to proceed with a technical investigation. Please advise what other steps I need to take.

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.