2012 Mazda CX-9 acceleration problems

Filed Jun 9, 2025 · Acceleration · TX

While drive i feel like there is sticking something below the car when i am accelerating. And the acceleration became hard. Also i heard a weird noise at that time. Then a saw a leakage below my car.

Filed Feb 22, 2021 · Acceleration · 112,000 miles · NY · crash

Tl* the contact owns a 2012 mazda cx-9. The contact stated that while driving approximately 5 MPH while pulling into a parking space, the vehicle suddenly experienced unintended acceleration and drove forward crashing into a wooden seating bench which was pushed into a building. During the incident the drivers foot was pressing the brake pedal. No injuries were reported. A police report was taken at the scene and the vehicle was towed away. The cause of the failure was not yet determined. The manufacturer and local dealer was not notified. The failure mileage was 112,000. The VIN was not available.

Filed Oct 8, 2019 · Acceleration, Engine · 72,000 miles · MA

Driving on rte 3 n in braintree. Car was decelerating while I had my foot on gas. Lost steering and barely made it to brake down lane. This car has 72k miles on it. Needs new engine.

Filed Jun 7, 2019 · Acceleration, Brakes · 52,000 miles · IL

Tl* the contact owns a 2012 mazda cx-9. While attempting to accelerate from a traffic light, the accelerator pedal was depressed; however, the vehicle failed to respond. The contact stated that there were no warning indicators before or after the failure. The brake pedal also became extremely difficult to depress. The vehicle was towed to continental mazda (located at 2363 aurora ave, naperville, il 60540, (630) 352-5900) where it was diagnosed that coolant entered the engine oil and caused the engine to fail. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified and provided case number: 1-2189354066. The approximate failure mileage was 52,000.

Filed May 10, 2019 · Acceleration · 56,000 miles · VA · crash

I was turning right into a parking space with my foot on the brake, when the car suddenly accelerated. The engine revved up and the car darted forward. For a split second I lifted my foot to make sure I was not pressing on the accelerator, and immediately pushed back down on the brake as hard as I could; the car continued to speed forward. Instinctively I kept the wheel turned to the right to avoid crashing into the building in front of me as the car jumped the curb, but I hit 2 parked cars. Once I was almost stopped by hitting the 2 parked cars, I quickly turned the key off and put the car in park. I have never experienced this issue before; and let me tell you, I was terrified. I have pictures that show tire marks either from the cars acceleration or dragging the back wheels from pushing on the brake.

Filed May 14, 2018 · Acceleration, Engine · 58,000 miles · CA

The transfer case is leaking and going to go completely out on my 2012 mazda cx-9, I noticed the same gear shifting problem in my 2004 mazda 6 wagon. The car feels like driving a stick, it jolts when shifting to drive and while moving it feels like it is shifting early. This is a known problem with mazda but a recall is yet to surface for this issue.

Filed Sep 5, 2017 · Acceleration · 70,000 miles · CO

Tl* the contact owns a 2012 mazda cx-9. While driving 55 MPH, the vehicle independently accelerated in excess of 75 MPH. The contact was able to stop the vehicle by shifting into neutral and shutting off the engine. The contact waited a few minutes and restarted the engine, and the vehicle returned to normal. The vehicle was driven to the dealer sill-terhar mazda (located at 1551 us-287, broomfield, co 80020; (303) 469-1801), but the failure could not be duplicated. The vehicle was not diagnosed or repaired. The manufacturer was contacted at 800‑222‑5500 and stated that they could not assist without duplicating the failure. The manufacturer also stated that they needed to speak with the technician. The manufacturer did not call the contact back. The approximate failure mileage was 70,000.

Filed Jan 21, 2016 · Acceleration · 41,010 miles · TX

Unintended acceleration in parking lot. Car was in drive, foot lightly on brake waiting on car in front to vacate parking spot. Engine suddenly surged and transmission made strange sound. Barely avoided running over an elderly pedestrian. This is about 4-5 time the car has done this in the last 6 months usually while waiting in a line of cars with foot on brake.

Filed Aug 20, 2014 · Acceleration, Brakes · 36,000 miles · WA · crash

I've purchased 2012 mazda cx-9 awd it late november of 2011.recently I've been experiencing multiple unexpected loss of power-assisted brakes failure incident .I was in a minor fender bendeer. Thank god the driver infront was very nice and didnt file any claim against my insurance. When I brought my vehicle into mazda services department to get it resolve. Instead of taking unexpected loss of power-assisted brakes as an urgent matter. They told me that my car is drivable and it still break. I can drive my mazda in the meanwhile, until they have an open appointment for my mazda to be seen. After speaking to multiple personel at the services department. They were able to take my mazda and fixed the unexpected loss of power-assisted brakes. Now im experiencing speed control and power train. I was at a stop light and my mazda stalled in the middle of a left turning lane, in addtion to the stall incident, I was also experiencing the traction control light came on and the tire pressure monitor light began to flash. It felt like car had downshifted a couple of gears. I lost forward power in all gears. My sons and I came close to multiple rear-ended incident because of the mechanical issue of our mazda cx9. Please becareful when deciding to purchased your mazda vehicle.

Filed Feb 27, 2014 · Acceleration, Brakes · 4,000 miles · IN

I am unsure of the first date of occurrence, but the following have been happening since I purchased this vehicle new with 12 miles on it. And the dealer can't find anything wrong with it. 1. The AC always comes on. Even when it's below zero outside. 2. It fails to go when pushing on the accelerator frequently, and especially in reverse, from a stopped position, until you really push hard on the accelerator causing it jump. 3. Last friday 2/21/2014 as I was on a ramp moving from one interstate to another, the engine continued to rev up even after I let off the gas, and pushed the brake. This is not the first occurrence of this, it's actually happened at least 10-12 times. It was definitely the most scary, as I thought I was going over the side of the ramp or into the semi in front of me for a minute or so. 4. The brakes squeak loudly when it's cold. 5. The brakes are either really sensitive, or you have to stomp them to get them to work, so since you don't know which it's going to be you're likely to jerk yourself and your passengers around a lot. 6. The vehicle pulls to one side or the other, which would seem to indicate that an alignment is needed, however, it can't pick which side it's going to gravitate towards which leads me to believe it's something in the steering.