2024 Mazda CX-90: engine overheating

Filed Nov 9, 2026 · Engine · GA

Around 69,000 miles, radiator started leaking. This is a known issue with this vehicle due to failure of factory crimping machine. Multiple open lawsuits related to this failure. This is a major safety concern as the vehicle could overheat and catch fire or explode. No recalls issued, but more and more complaints and failures reported.

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 Aug 23, 2026 · Transmission · WA

During normal operation of the car the radiator sprung a leak which could have resulted in leaving us stranded with our young kid. this was verified by the dealership who's only solution has been to replace the radiator at our expense. There were no warning lights or other indications of the damage other than coolant leaking from the bottom of the car

Filed Jun 30, 2026 · Electrical, Engine · MT

There was a recall issued within the last year for my make and model vehicle, in March 2026, it was fixed when my car was towed to a Mazda dealership due to a check engine light and "hybrid engine malfunction". On June 24, 2026, the vehicle went into limp mode, the error message resolved upon turning off the vehicle. There were no check engine lights that appeared. On June 25, 2026, the vehicle went into limp mode on I-5 in traffic. We were able to safely get the vehicle to a safe location out of traffic. The error code on dash was "hybrid engine malfunction" again. The radiator was replaced at a second Mazda dealership, we were told "that should fix the problem". There was no indication the radiator needed replaced due to no fluids leaking and no overheating of the vehicle. The battery did fail during this visit. On June 26, 2026, when we were on I-90 in traffic again, the vehicle went into limp mode again with the same hybrid engine malfunction warning. The vehicle was towed to a third Mazda dealership to finally have the hybrid battery finally replaced. The only warnings were when we went into limp mode, no dash lights or check engine lights, nor overheating. The safety of my family was put at risk due to the vehicle decelerating from 75 mph to 35 mph in the fast lane of traffic twice. Mazda has done all service repairs and recalls.

Filed Jun 2, 2026 · NJ

radiator cracked causing overheating in need of repair. did not hit potholes, was not in an accident. 46,000 miles, 2024.

Filed Apr 24, 2026 · Engine · SC

Radiator leaking at seems causing engine to overheat. The radiators on 2024 and earlier CX-90 are failing at the seems of the radiator. This is a known issue to Mazda, hundreds of vehicles are having to be repaired for this manufacturing defect and they are charging the consumer $2800.00 to repair something which should be covered under a recall. This vehicle is a lemon and they refuse to stand behind their product.

Filed Feb 15, 2026 · Acceleration, Steering · NY

To Whom It May Concern, I am submitting this complaint to report serious and ongoing safety concerns regarding my Mazda CX-90. I believe this vehicle presents a significant safety risk to occupants and other drivers on the road. Since the date of purchase, this vehicle has been subject to numerous recalls, repeated software updates, and multiple mechanical issues. The number of recalls alone raises concern about the safety and reliability of this model. In addition, the vehicle has been in service many times, and I have frequently been provided a loaner vehicle due to unresolved problems. On the day of purchase, the vehicle suffered a mechanical failure and had to be towed. While driving in my neighborhood with my children inside, the vehicle suddenly stopped moving and became stuck in reverse. A brand-new vehicle should not experience this type of failure. More recently, I experienced a dangerous steering event on the highway. While traveling in the left lane, the vehicle suddenly swerved into the right lane, then back to the left, and continued oscillating between lanes. The steering felt momentarily out of my control. If surrounding traffic had been heavier, this could have resulted in a serious collision. After inspection, the service department stated that no issue was found and offered no corrective action. Additional safety-related concerns include: The vehicle has unexpectedly stopped driving while in motion on multiple occasions. The steering system behaves unpredictably at times. The hybrid system has malfunctioned repeatedly, the vehicle has overheated and emitted a strong smoke odor. These repeated failures involving steering, powertrain, and hybrid systems raise serious safety concerns.Given the pattern of recalls, ongoing mechanical failures, and the inability of the service to diagnose or correct these issues, I believe this vehicle poses an ongoing safety hazard I respectfully request that the federal safety agency formally investigate these issues Kim

Filed Jan 14, 2024 · IA

Climate control system issues. Fails to maintain set temperature. Overheats interior when temperature is selected at 68 degrees. Have to turn it down to 62 degrees to maintain an acceptable temperature. This is in the Midwest with outside temperature below 30 degrees and climate control set to auto.