2019 Mazda CX-5

Went to drive home from work one night, car had been normal until this event. Car suddenly began to state that it was overheating and throttled my speed down to 20 MPH. I was in the middle of traffic going 40-50 at this time. Turns out there is a VSB regarding a coolant leak that can occur and break. Nothing about how you are suddenly governed to 20 MPH

I had just had my car serviced for 30k services and about 2 months later smoke was coming out of my engine after driving. Took it in and it turned out to be a cracked cylinder head. None of my lights were on indicating there was an issue either. I was told this is a known issue with Mazda and should be a recall but there still isn’t one. TSB#SA-031-21

The Cylinder head cracked and caused oil to spill out. This was inspected at Towne Mazda in Orchard Park, NY. I was driving ~50 miles when the issue occurred, and had driven approximately 40 of the 50 miles when me and my sister pulled over and noticed my engine smoking and the burning smell to be pungent. Had I not pulled over, It could have led to engine misfire and damage to other parts of my vehicle. The Dealer confirmed the need for a new cylinder head and parts, and is currently repairing the vehicle. The Component was not recently inspected by the manufacturer, police, insurance. During the course of driving, after about ~35 miles, the oil pressure light turned on. I drove roughly 5 more miles before I pulled the car over to have it towed to my Mazda dealership.

As I was driving home one day in February 2024, my car felt like a strong gust of wind was getting up underneath the hood of my car, causing it to pull left and right slightly. When checking the weather, wind gusts were at 5 MPH and you could barely see trees/leaf movement. I pulled off the side of the road, checked underneath the car to see if anything was dragging/missing and all was fine. As I started driving again, I then noticed my RPM's vs MPH was very strange. When accelerating, the car randomly increased up to 4,500 RPM when trying to go 45 MPH, then shifted down to 2,000 RPM's once I reached 45 MPH. But, no matter if I left my foot on the gas pedal, lifted my foot off of the gas pedal or hit the breaks, the car would not move off of 2,000 RPM's until I pressed my foot on the break all the way down to the floorboard. No lights came on at all. I took it to the dealership that I purchased it from, expressing the scary feeling of the driving the car and showing video proof of what the car was doing in RPM's vs MPH. After further conclusion, they determined that a "sensor" had gone bad. The thought that a plastic, electronic sensor going back caused my car to feel that way and put my life at risk while driving is a scary thought. Fast-forward to April of 2024, similar symptoms have come back again. Wind feeling like it's getting under my hood, causing the car to pull left and right, RPM's not matching up and now a hot engine with no warning light coming on, is questioning if it's this particular sensor again. Not to mention, I had it inspected by the dealership two weeks ago and had an oil change done to it and the dealership said "everything looks great". You should have zero thought or worry when operating your personal vehicle, but in the past three months, I have taken my car to the dealership and or a mechanic 7 times with thoughts/worries about my car. This car has now turned into a "lemon" as one would call it and I'm terrified to even start the car.

I developed a cracked cylinder head in my 2019 Mazda CX-5 that only had 33,000 miles on it. I lost approximately 50% of my oil in a 4 mile drive. I believed I had been leaking oil, checked the dipstick, drove 4 miles (max speed of 35 mph), smelled the burning oil, pulled over, saw smoke coming from the hood and checked the dipstick again. Losing this much oil is a safety risk with the possibility of a fire especially if driving at a faster speed and inability to have a safe place to pull over along with smoke from the burning oil causing visibility issues which at higher speeds such as on an interstate can cause a safety concern. No indicator lights/messages appeared, this was determined from seeing what I thought was oil on the ground and then checking the dipstick. Mazda is well aware of the issue. When picking up the car for the dealership after being fixed, I asked what kind of parts were used to ensure this does it happen again. The shop employee said they were “revamped” parts due to the known issue with this model and pointed out 4 other Mazda cx5s currently in the shop with the same issue getting repaired.

Had the sudden onset of strong exhaust fumes in the cabin as others have described - especially when idling at a light. Returned to dealer after having it up on a rack to find oil dripping everywhere (shield underneath prevents from seeing drops when parked) - got word today it is indeed the cylinder head assembly. How is oil running on hot exhaust not a fire concern? I had to roll my windows down for fresh air in zero degree weather the fumes were so strong inside the vehicle. On top of that the P0126 (thermostat stuck open) diagnostic code is back for the second year in a row after having the “fix” installed under warranty last year.