2024 Mazda CX-90 Plug-In Hybrid: sudden loss of power

Filed Dec 11, 2025 · Electrical, Engine · TX

I am reporting serious safety concerns with my Mazda CX-90 PHEV (leased, manufactured September 2023). These issues create unacceptable risk to occupants and other road users. Multiple Severe Recalls: My vehicle has had at least four major recalls: • 6323J – Engine & Motor Shutdown: Complete loss of propulsion without warning. • 7024J – ECU Software Failures: Loss of drive power and restart failures. • 24V817000 – EV Mode Power Loss: Sudden propulsion loss in EV mode. • 6724E – Sudden Braking: Automatic braking without cause. These defects could lead to crashes or fatalities. Hybrid System Malfunctions: Two recent “Hybrid System Malfunction” warnings required dealer visits. These failures could cause the car to shut off while driving—even at highway speeds. • First incident: Battery-related issue. • Second incident: Triggered by a loud noise during startup, impacting the AVAS system. A loud noise should never disable a family vehicle, indicating a design flaw. Charging Safety Issues: Charging via a standard outlet caused flickering lights and breaker buzzing in my house. A licensed electrician diagnosed harmonic distortion from the onboard charger. I spent $7,500 on electrical upgrades (dedicated EV line and panel upgrade) to charge safely. Manufacturer Response: I have had an open case with Mazda corporate for nearly two weeks. They refuse to acknowledge overall vehicle safety or provide written documentation confirming safety. Request: I urge the federal safety agency to investigate whether these defects represent a systemic safety issue in Mazda CX-90 PHEV models and take appropriate regulatory action

Filed Sep 22, 2025 · Engine, Transmission · UT

While driving 35 mph on a busy street, our vehicle completely lost power. The vehicle started violently shaking until I came to a complete stop. Many warning lights came on. Two primary: "Hybrid Malfunction", "Engine Malfunction" along with a couple others. When I stopped the car completely, it took 5 minutes before I could change the car from park to drive to move the car out of the way of oncoming traffic. Sitting in the middle of a busy road with hazards on is not safe!! Also, Suddenly losing power on a very busy street caused car behind me to slam brakes and honk at us. Very lucky we didnt cause an accident. If this had happened in a different situation such as freeway at 75 mph, major intersection, on a long roadtrip etc... the risk for significant disaster increase significantly! The car is current at Tum Dahle Dealership in Murray, Utah. This is the second time in 4 months we've had to take this car to the dealer for an issue. The first time was just an "Engine Malfunction" light. It sure seems like we bought a lemon. Even if they fix this car, my confidence is extremely low in this car being a safe car that im ok with having my family in.

Filed Sep 2, 2025 · Acceleration, Electrical · CA

Ever since the lease of this vehicle on January 2025 we’ve had problems with the brake/rotors took it in twice for that. As of recent August 2025, we took it in for loss of power going up a hill, hybrid malfunctioning electrical system going out. Dealership gave it back saying everything was fine. We took it on August 29, 2025 to Colorado vehicle failed to perform loss of power going up the mountain almost got hit by a vehicle because I was in a fast lane with my family had to pull over with whatever power I had left in the engine (not the battery). I mean the vehicle just keeps failing to perform as it should as well on the way back. It had the same issues but as severe going to Colorado.Vehicle does not change gears going uphill. When we stopped in Vegas for fuel, fuel door did not open it & malfunctioned. So vehicle does not perform well in cold and hot weather AWD system does not work at all. We feel a jerking, we hear a whistling’s type of noise that the dealership fell to inspect. Per them everything worked fine but when we took it to Colorado this weekend for Labor Day, vehicle underperformed with extreme safety concerns and we contacted Mazda, but they fell to listen to our concerns and say the vehicle is fine but when you drive the vehicle, it does not perform as it should and is a safety hazard to us and anybody around us due to a loss of power and everything I described above.

Filed Jan 31, 2025 · Engine · NC

This is a 2024 Mazda CX-90 PEHV where I took it in for all recalls on January 17th, 2025 related to loss of power and hybrid system malfunction. Today, Jan 31st, 2024 (2 weeks and a few 100 miles later), I now have engine malfunction warnings lights. This car has serious issues that nearly caused a bad accident where POST recall, the issues continue

Filed Jul 26, 2024 · Electrical, Engine · NC

July 11, 2024 – Odometer – 7,604, Gas – Full, Electric – 19 Miles range - From work to Home, Receive the following errors “Engine Malfunction, Have Vehicle Inspected” and “Hybrid System Malfunction, Have Vehicle Inspected” warning lights come on. Cars behavior – Air conditioning motor running but not cooling air, Loss of power and car very sluggish (have to be careful at intersections), seems to maintain speed even when taking foot of gas and requires extra breaking, seems to be clunky when transmission upshifts/downshifts at times. When leaving work, did not seem to like being in EV mode even though fully charged (Chargers at work) and would switch itself out of that move and say unavailable. Outside air temperature 90 degree (Air Conditioning not working, very uncomfortable). This defect is dangerous and I serious concerns driving this car such as unpredictable loss of power when entering traffic and hesitation / unpredictability when hitting the accelerator. In addition, with the car maintain speed while not touching the gas pedal and requiring extra breaking is a scary. June 13 – Issue cleared and wanting lights were gone before I was able to take it in for service. July 25th – Recurrence of the same issue - Odometer – 8,162, Gas – Full, Electric – 14 Miles range - From work to Home, Receive the following errors “Engine Malfunction, Have Vehicle Inspected” and “Hybrid System Malfunction, Have Vehicle Inspected” warning lights come on. Cars behavior – Air conditioning motor running but not cooling air, Loss of power and car very sluggish (have to be careful at intersections), seems to maintain speed even when taking foot of gas and requires extra breaking, seems to be clunky when transmission upshifts/downshifts at times. When leaving work, did not seem to like being in EV mode even though fully charged (Chargers at work) and would switch itself out of that move and say unavailable. Outside air temperature 87 degree (Air Conditioning not workin

Filed Apr 22, 2024 · Fuel system · CA

Car suddenly, unexpectedly, and without warning lost power while driving putting us at risk for serious collision/injury with inability to drive the car and then gave "Hybrid System Malfunction" warning. This occurred AFTER performing the recall which was supposed to address this issue.

Filed Apr 18, 2024 · Electrical, Transmission · WA · crash

Driving up snowy pass on I-90 approaching the top of Snoqualmie Pass. Vehicle stalled and warning lights flashed critical warning and loss of power. The vehicle stopped in the middle of the highway and would not start or go into drive. After a few minutes, because of speeding and adverse conditions, another driver collided with my vehicle from behind. Another following vehicle lost control and ran off the road. Nobody was injured. Mazda has not provided any information to what happened with the vehicle. We added about 12k miles in the 5 months of driving it, so we had lots of testing with it, and never ran into this serious of an issue with this or any other vehicle.