2015 Mazda CX-9: engine failure

Filed Feb 1, 2024 · Engine · 124,000 miles · MS

The contact owns a 2015 Mazda CX9. The contact stated that while driving at approximately 55 MPH, the vehicle shut off. The contact stated that the engine was overheating. The contact restarted the vehicle, and the vehicle stalled again. The vehicle continued to coast into a parking lot. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the water pump, timing chain, cam phaser, timing chain tensioner, and an engine replacement were needed. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 124,000.

Filed Apr 14, 2023 · Engine · CA

My check engine light came on. Thought it was the oil needing to be changed. Oil was extra dark and muggy. Also notice antifreeze low. Fill up antifreeze and change oil. 2 wks later antifreeze back down low. Check engine still on. Got it diagnosed with auto scanner and says camshaft sensor. Went to autoshop, mechanic says it's not cramshaft sensor but water tank leak in engine which was picked up by camshaft sensor. I have yet to find out what else is wrong or if my engine needs to be replaced. For sure the water tank needs replacement. I read from others of their car over heating or completely stopped working. I fear this because I have 3 kids and on weekends I drive on the highway for about an hour to get to my destination. This is something dangerous because I don't want to get rear ended or hurt if my car suddenly gives out during heavy traffic.

Filed Feb 16, 2023 · Engine · VA

Engine failed suddenly while driving on a busy street. No lights were on, no warnings. Slight hum earlier that day, that was almost indistinguishable from the radio or other road noise. Steering and brakes not responsive. Had it towed to dealer who found that the water pump had failed which allowed coolant to leak into the oil. Dealer mechanic stated that the water pump is not visible to any mechanic without removing the entire engine, therefore would not have been able to see defects or problems ahead of event. Also said the fix would run a minimum of $3400 if a new water pump could even fix the problem. Found that there is a class action lawsuit against Mazda already for the CX9 for my model year because they know of the problem yet refuse to recall. I am one of many this has happened to. It is very unsafe for a car to suddenly seize while driving. Especially with no warnings and with the car having only 97000 miles on it. Had my new teenage driver been behind the wheel or had it happened a few minutes earlier while I was on the interstate, the outcome could have been very different.

Filed Jan 27, 2023 · Engine · GA

Water pump failed and leaked coolant into oil. Known issue by Mazda but they have failed to warn consumers. Repairs roughly 4000 dollars. Luckily I caught before engine failed due to lubricant dilution from coolant. Potentially a very dangerous flaw.

Filed Apr 18, 2022 · Engine · MA

On December 14, 2015, I bought, a Mazda CX-9, at Sentry West Mazda located at 940 Boston Turnpike, Shrewsbury MA 01545. Unfortunately, the car's engine contains a defect in design, manufacturing, materials and/or workmanship that causes the water pump to suddenly and prematurely fail well-before the end of the useful life of the engine, which leads to catastrophic engine failure or a costly replacement due to the water pump’s inaccessible placement in the engine. On March 7, 2022 while driving the car to the dealer to take care of a Check Engine Warning Light, the car started to shake, all the dashboard lights turned on and the car stopped. My car was immediately towed to the dealer, and hours later I was told that my car needed a new engine. I felt paralyzed with awed when I heard that my 2015 Mazda CX-9, which was just 6 years old with no more than 90,000 miles, needed a new engine. I have been taking this vehicle to the Mazda dealer for all its repairs and maintenance needs, so I can be confident that my family were safe in this car. Unfortunately, this has not been the case. In addition, please note that there is a pending litigation against Mazda for this kind of Engine. Please see more information in this link. https://www.ktmc.com/mazda-water-pump-engine-failure I strongly believe that a car like this is a threaten to the life of anyone driving in and to the people around it. Therefore, I am asking to this organization to take immediately action on this case. Thanks in advance for your attention to this matter, [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Filed Mar 20, 2021 · Engine · 107,300 miles · TX

Engine light came on then my vehicle started over heating and leaking coolant. Vehicle was towed to dealership.after technician diagnosed the problem, I was told it was the internal water pump that caused fluid to mix with the engine oil ruining the engine. I was told I had three options: buy a new engine, buy a used engine or buy a new car. I was told that this was an issue with this year, make and model for several customers. I asked why a recall notice was not given to vehicle owners and was told it was not a safety issue. It would have resulted in an accident if I was on the freeway due to the sudden occurrence of the breakdown. I was driving on a street in traffic. (middle lane)when my car started overheating and shut down. I managed to get it to restart and was barely able to safely pull into a parking lot where I quickly turned it off. I contacted the greenway mazda dealership to report problem and request tow service . Mazda has apparently been aware of this issue for a while.

Filed Oct 28, 2020 · Engine · 65,000 miles · MD

We purchased a 2015 mazda cx9 with 30,000 miles three years ago. At the start of the month, the car suddenly overheated while driving and the engine failed! The mechanic said the water pump failed, the coolant mixed with the engine oil and the engine was done. $$7944.41 additionally, the overheated engine caused the transmission fluid to burn to a point the the transmission failed. $$4864. This happened at 65,000 miles, 5,000 miles past warranty. After researching the problem, we learned that this is a common problem on mazdas that use the duratech engine. There are thousands of examples and a class action lawsuit.

Filed Oct 6, 2020 · Engine · 84,564 miles · CA

Code p0016 came up one day prior to engine failure. 30 miles after check engine line came up loss power. Upon inspection water pump failure at 85000 miles. Engine most likely toasted