2017 Mazda CX-9

2017 Mazda CX-9 with crack in engine with coolant leaking out. Informed by mechanic that coolant was leaking out from the engine and was caught by heat shield. I smelled coolant, but never saw any on the ground. Per TSB 01-002/23 there is a crack that can develop in the engine due to stresses from the turbo/exhaust. A crack will develop near studs in the engine. Once crack develops, the coolant can leak out. However, in worst cases (which mine did not suffer from...yet), the coolant can leak into the engine and damage the internal components. Right now, I am looking at a $6254 repair bill to have a mechanic fix the engine. I will probably have to take this bill on as my family needs a second vehicle. Mazda needs to issue a recall that is the fault of their own, not the customer. This is occurring on too many vehicles, with turbos, from 2016-2020 CX-9s, CX-5s, and Mazda6s.

My car gave me a warning that it was overheating... and gave me a warning to pull to the side of the road because of safety and turn off my car engine because the engine is overheating. I was on the highway when this occurred. The engine coolant light was well into the red zone. I had my two kids in the car and my service animal... The car was say overheating and blinking the engine coolant red warning sign I brought the vehicle to a dealership and it was confirmed that my engine coolant was leaking behind the gasket head and is damaging the turbo charger. The same issue word for word that was stated in the TSB... Yes the warning sign of engine overheating and the engine coolant light to high flashing showed up on the vehicle and the warning of pulling over to a safe place to allow the car to cool down. I was on the interstate when the problem occurred. I also had to put coolant in the car because the reservoir was completely empty to take it to dealership for diagnostic assessment...I bought this car 6 months ago and it was running fine until 3 weeks ago. When the coolant continued to leak and the warning signs would not go away stating the engine was overheating. The repair for this known problem is astronomical and I'm wondering why Mazda has not sent a safety recall and why we are on the hook for the repairs when they know it's a manufacturer defect.

August 1, 2023, I discovered the coolant reservoir for my CX9 was empty, had to tow the car to the Mazda dealership, after a few days, the dealership informed me that I have a coolant leak at the cylinder head. This issue is related to the TSB #01-013-21-3753a. The Mazda dealership and Mazda USA informed me that I will have to pay $7,800.00 to have the car fixed, which is ridiculous, but the more serious part is that the car did not gave me any warnings, lights, overheating nothing. If it wasn't because I personally check the car fluid and didn't used the car afterwards, I could have hit the road and be left stranded in the heat or have an engine failure and cause an accident while on the highway.

I experienced coolant leaking from the cylinder head. Mazda is quoting me over $7700 for the repairs. There was a TSB released, there had been numerous revised versions re: the same issue, in Feb 2023 finally including my vehicle. Mazda knowingly put me and my family’s safety in jeopardy by not including me sooner, and now have left me with an astronomical repair bill for an issue they’ve known has existed for years. Had they alerted me when the originally discovered the issue, the vehicle would’ve been under warranty and they would’ve had to replace the parts under warranty.

I was driving on the highway and noticed my car engine temp was way too high. pulled off to the side and found out it lost all its coolant. looked under the car and saw the coolant dripping from the engine. If i didnt notice the car was over heating it could of shut down on me causing a safety issue for me or others. I checked online for the issue and found out this has been a problem for years. the mazda dealership i bought the car from 2 months ago should of known seeing how a TSB was sent out by mazda. There were no symptoms or warnings prior to this.

Engine cylinder cracked causing overheating and need for a total engine replacement. Service technician said that crack was due to an in factory assembly error - overtightening of components of the exhaust system. This is an issue that has happened in other Mazda CX-9's and Mazda is aware of the problem. Vehicle overheated while on a very busy highway and throttled my speed - I could have easily been hit while trying to get to a safe place to park.

Driving home the car said 26 miles to E. while in gear going down the road it popped engine system malfunction and the whole car shut off and wouldn't start. Didn't drive the vehicle for 2 days- filled the gas tank and it drove fine for 5 days. Day 6- 4/8/2023, fine driving down the highway 45 minutes. Go down about a mile and it still doesn't seem right, I move lanes and the thermostat light starts flashing at 260, as soon as I make the turn it tells me to pull over and turn the car off-it was at 270. Go to drive across the street to get coolant later- car stalls when I shift into drive. Park it- get coolant takes an entire jug. Idling a little rough, but not bad. Mechanic he can't see any issues, computer is throwing out fuel system codes but no, issues that can be found. Does a tune up on it, pick it up. Smoking when I start the car and something smells burning. Driving home, it stalls again while in gar at a red light. RPM jumping between 500 and 750 while in gear. Park it for a few hours- everything seems fine. Drive 35 minutes- mostly highway. RPM isn't moving when in park vs neutral. While at last red light before home- engine system malfunction comes on. Driving a few miles down the road still on, temperature at 200. Drive about half a mile down the road- at 260 as I'm pulling into my driveway. Towed to Mazda the next day. Got diagnosis that the head lifted and coolant mixed into oil, flooding engine. Need a new engine and turbo- $10,000 to fix it. Never had issues prior and no signs of anything going wrong. Oil change done 2 weeks prior to this all starting.