2010 Mazda CX-9 engine problems

Filed Jun 4, 2023 · Engine · GA

Water pump failure causing catastrophic engine damage

Filed Dec 27, 2022 · Engine · 160,000 miles · OH

The contact owns a 2010 Mazda CX-9. The contact stated while conducting a routine check, he noticed that the coolant and the oil levels were low. An independent mechanic diagnosed that the coolant was leaking into the engine. The vehicle was not repaired. An unknown dealer was contacted and informed the contact that the VIN was not included in a recall related to the failure. The manufacturer was not notified of the failure. The failure mileage was 160,000.

Filed May 11, 2022 · Engine · WA

The water pump failed and leaked coolant into the engine, causing motor damage which requires motor replacement. There was no evidence of any failure until the vehicle overheated while being driven. This is a known design flaw of the engine design but no recall has been issued.

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 Oct 10, 2021 · Engine · MA

Our 2010 Mazda CX-9 stopped on the highway and had to be towed away. The dealer determined it was an engine failure due to a faulty water pump. It had leaked into the engine, causing permanent damage. No warning lights. The car just stopped. Two dealerships did not want to repair. There is a class action lawsuit. https://www.ktmc.com/mazda-water-pump-engine-failure There should be a recall. We need a refund for the repair we had done, totaling more than $7000. Please look into this safety issue. Mazda Corporate has our complaint on file. We are expecting a refund.

Filed Jul 16, 2021 · Engine · NC

My vehicle completely shut off while idling in park with no prior warning to anything being wrong. Put coolant in since the container was empty. Replaced thermostat, but vehicle was still overheating. Had it towed to Flow Mazda of Fayetteville and had them run a diagnostic. They determined that coolant was leaking into the oil due to a broken water pump. It was estimated to cost approximately $5,000 to repair with no guarantee that it would fix the problem. They pulled 4 sludge codes. There is currently a lawsuit against Mazda for this specific problem that was filed in 2019.

Filed Feb 2, 2021 · Engine · 108,000 miles · TX

We were sitting in a parking lot waiting on a pizza. We noticed the A/C wasn't cooling, and then noticed the car was starting to overheat. (this was the first time ever). We checked the radiator, it was empty. We purchased coolant and filled up the reservoir. Never saw any leaks. Car started but seemed sluggish like the battery was low. We got our pizza and drove about 6 miles where we parked till we took it to the dealer on monday. Our mechanic called me later to tell me that the water pump had failed and that it had leaked into the oil pan and we would have to have the engine replaced. The repair total for my cx9 is at $9k. We have 108,000 miles on the vehicle. My vehicle is still sitting at the dealer.

Filed Aug 13, 2020 · Engine · 127,422 miles · PA

Tl* the contact owns a 2010 mazda cx-9. The contact stated that while driving 25-30 MPH, the vehicle shutoff with the check engine warning light illuminated. The contact checked under the hood and noticed the coolant reservoir was empty. The contact pushed the vehicle to her residence. The contact stated that the next day she noticed coolant mixed in with the engine oil. The contact called jack giambalvo mazda (2425 industrial hwy, york, pa 17402, (717) 755-2944) and was informed that the failure may be the water pump however, the vehicle was not diagnosed nor repaired. The failure mileage was 127,422. The water pump was previously replaced at 61,000.

Filed May 14, 2020 · Engine · 108,000 miles · MA

Tl* the contact owns a 2010 mazda cx9. The contact stated that while their son was driving approximately 30 MPH, the vehicle stalled without any warning. The vehicle was taken to an independent mechanic to be diagnosed. The contact was informed that the water pump failed causing coolant to mix with the engine oil and damaged the engine. The contact then took the vehicle to quirk mazda (99 mcgrath hwy, quincy, ma 02169, (617) 773-8000) who confirmed the previous diagnosis. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and stated that the repair was not covered under warranty or recall. The approximate failure mileage was 108,000. Vin not available

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