2024 Mazda CX-90- Plug-in Hybrid electrical system problems

“Vehicle alarming charging system malfunction. Vehicle lagging and lurching forward. Unable to drive safely. Battery lights on. Second time this has happened. Currently at dealership for repair.”

“While driving through a busy intersection with my family inside the vehicle, my 2024 Mazda CX-90 suddenly experienced a complete loss of propulsion. Pressing the accelerator pedal produced no response, leaving the vehicle unable to accelerate or maintain speed. The vehicle displayed warning messages stating “Engine malfunction” and “Stop safely and shift to Park.” I was forced to rely on the vehicle’s remaining momentum to coast out of the busy intersection and into a nearby gas station. This unexpected loss of propulsion created an extremely dangerous situation and placed my family at serious risk of a collision with surrounding traffic. Following the incident, the vehicle was taken to Hiley Mazda, where technicians diagnosed a failed 48-volt mild-hybrid battery and ordered a replacement under warranty. A leaking radiator was also discovered during the same service visit. This vehicle has an extensive history of electrical malfunctions, abnormal i-Stop operation, software-related issues, and previous safety concerns. However, this incident was particularly alarming because the vehicle completely lost propulsion while operating in active traffic. I am extremely…”

“The contact owns a 2024 Mazda CX-90. The contact stated that the vehicle was previously repaired by a dealer. While driving, the vehicle lost motive power. The contact turned off and restarted the vehicle. Additionally, the front passenger’s seat failed to move as needed. The vehicle was taken to the dealer, and it was determined that there was a radiator and battery case leak. The contact was informed that the vehicle was unsafe to drive and was provided a loaner vehicle. The dealer replaced the battery and the front passenger’s seat electric switch. The battery case and radiator needed to be replaced. The manufacturer was notified of the failure by email. The failure mileage was 46,464.”

“Our 2024 Mazda CX-90 has experienced the same significant malfunction on two separate occasions while being driven on busy public roads. The vehicle displayed an “Acceleration Limited Due to Battery Condition” warning and experienced significantly reduced/limited acceleration while driving. This put the occupants and other motorists at risk because the vehicle could not accelerate normally in traffic. A similar occurrence while merging, crossing an intersection, or traveling in heavy traffic could potentially result in a collision. The vehicle has been taken to an authorized Mazda dealership twice for the same issue and has been out of service for approximately six cumulative weeks. The vehicle is currently at the authorized Mazda dealership and is available for inspection. The dealership has been made aware of and is attempting to diagnose/repair the recurring condition. The exact component or system responsible for the failure is currently UNKNOWN. The issue recurred after the vehicle was previously returned to us following the first repair attempt. Prior to/during the failure, the vehicle displayed the warning message “Acceleration Limited Due to Battery…”

“Driving down the freeway, the car throws an error code, reduces speed from 75 to 40 in seconds, with enough time to pull off the freeway. The car has an error code stating "Hybrid battery malfunction." Now the car will not start. The Dealer could not get it started and now wants to charge me for a diagnostic. But from my understanding, they should cover a new battery under EPA regulations (40 CFR Part 85). Any help would be greatly appreciated.”

“I am reporting a recurring safety-related issue with my 2024 Mazda CX-90 Turbo S Premium involving the mild hybrid system. The first failure occurred at approximately 28,000 miles. While driving, the vehicle displayed multiple warning messages, including "Mild Hybrid Battery Malfunction," "i-Stop Malfunction," and "Engine Malfunction." Shortly afterward, the vehicle entered a reduced-power (limp mode) condition. The loss of normal power made it difficult to safely accelerate and keep pace with surrounding traffic, creating a significant safety concern. The dealership diagnosed the vehicle and replaced the mild hybrid battery. My vehicle remained out of service for approximately one month while repairs were completed. At approximately 56,000–58,000 miles, the same problem occurred again. The vehicle once again displayed the "Mild Hybrid Battery Malfunction," "i-Stop Malfunction," and "Engine Malfunction" warning messages and again entered reduced-power mode while driving. The repeated loss of power created another serious safety concern because the vehicle could not accelerate normally when merging into traffic or driving on higher-speed roads. After diagnosing…”