2010 Mazda CX-9: sudden loss of power

Filed Apr 9, 2022 · Electrical, Engine · TX

I had engine failure with a complete loss of power and a shuttering of the steering wheel while pulling into a parking lot and going less than 30 miles per hour. The temperature gauze went from cold to hot suddenly. There were no leaks of coolant or oil and no signs that the engine was out of water or that the water pump had "melted". On the final car repair trip we found out that the engine has an internal water pump that failed and resulted in oil & water getting into the engine. The engine light NEVER came on, I had complained about the tire pressure light blinking on and off in November 2021 and the deceleration issue I was having. The dealer did a coolant flush 11/2021. In early March 2022 the engine shut off as I was backing out of the driveway. I took it to a repair shop nearby they could not find anything wrong except that the car went into limp mode. They also did a coolant flush and radiator cap exchange since I forgot I had just done one on Nov. Less that a week later the engine failed again. We towed the car to the dealer for the third trip in less than four months. I am really disappointed that Mazda failed to recall the engine. I could have been seriously hurt if I had been traveling at high speeds. The CX9 had less than 135,000 miles at 12 years old.

Filed Sep 16, 2019 · Engine · 66,234 miles · CO

While driving on a city street, and without any indication that something was wrong, all of a sudden three warning lights came on, engine lost power, accelerator, brakes and steering were unresponsive. I am lucky I could manage to get into a turn lane and stop using the emergency brake. Car was towed to mazda. Told water pump failed and now coolant is mixed with engine oil, engine likely ruined. The car has 66,000 miles on it. Internet research shows this is a known problem on cx-9s and mazda did not issue recall. Is it safe for these cars to be on the roads? See https://www.carcomplaints.com/news/2019/mazda-water-pump-lawsuit.shtml

Filed Sep 14, 2019 · Engine · 134,000 miles · KS

Me and my husband were on our way home from work. The car suddenly overheated and we lost power on I-35, we were able to get the car to an exit and was nearly hit by another car due to loss of steering and power. We had the car towed to a mazda dealership. There is engine coolant in the oil and we are told it needs a new motor.

Filed Jul 2, 2019 · Brakes · 100,000 miles · TX

Tl* the contact owns a 2010 mazda cx-9. While driving at any speed, the brakes lost power and the brake pedal was difficult to depress without warning. The contact called mazda of clear lake at 281‑823‑5000 (located at 20101 gulf freeway, webster, tx 77598) and was informed that the warranty was expired. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was approximately 100,000.

Filed Jun 12, 2019 · Brakes · 77,700 miles · MD

As noted by many on this site, I experienced a scary brake booster failure. Complete loss of powered brakes which put my whole family in danger. This is a family car and I have small children so this is appalling that mazda would not issue a recall for this problem. I see that there was a tsb and associated extended warranty period for this issue but as many have noted on this site, the true failure tends to occur after the 7 year warranty period. I actually started noticing some issues with the braking on this vehicle years ago, but assumed that it just needed new brake pads and rotors as the car was getting older. If I had received some type of communication from mazda or the federal safety agency, then I would have known the true issue during the extended warranty. I only have 77,000 miles on this car, but since it is older than 7 years... Mazda refuses to address the problem or take accountability for this quality defect. I paid for the repair myself. Mazda has lost a loyal customer. Shame on them for putting drivers and their families knowingly at risk and not doing the right thing.

Filed May 13, 2018 · Transmission · 62,000 miles · CA

This mazda cx-9 is a 2010 with about 62000 miles on it. I was driving on a highway with 70 MPH. Suddenly, I heard noise and crack. Shortly, after, the car lost power and it won't go forward. Took it to the mechanic and they found the power transfer unit broken. Replacement was $3000. Went back to my paperwork. Found that ptu is under extended warranty program including only 84 months or 90000 miles. I sent reimbursement to the mazda and they refused claiming that the car warranty is more than 84 months (which is not true). It is really disappointing that I have to hire a lawyer to get this flaw in mazda's design reimbursed. The warranty does not start on jan 1st of the manufacturing year. I had to pull the carfax to prove that they car was purchased after april of 2010 to prove the 84 months window is valid. They have this information but they decided to play ignorant. In any case, this a major flow in the cx-9 design for the ptu. They have to take responsibility for such flow and they need to be accountable for such sloppiness in their product that endangers lives on the street. All these cars should be taken off the streets.

Filed Apr 1, 2018 · Engine · 106,000 miles · AZ

The engine completely lost power. Timing chain failure in downtown area / traffic, causing failure of head gasket. Warning and immediate failure when in motion in busy downtown midday traffic.