Smoke started coming from the front end of the car so I brought my car into the Boniface Heirs Mazda dealership for a diagnostic. I was informed by the mechanic that my car has a factory defect and the head of the engine was welded wrong. Apparently this is a known factory defect in the 2018-2019 Mazda CX-5s as I have seen other reports for the same issue. I reached out to Mazda corporate to see if they could help with -??after warranty assistance-?? since this was a manufacturers issue and I do everything to maintain my car properly. They denied any help and do not plan on recalling the part. I had no warning lights just smoke pouring from the font of my car. I do not understand how this is not considered a safety issue. I-??m lucky my car didn-??t catch on fire. I now have to decide between spending $5000 to fix the engine head or to sell my car and find a new one.

- Palm Bay, FL, USA

While driving down the road my Mazda CX-5 continues to just stall and the engine light turns on and the safety features turn off. I was driving down a road in town and the engine started stalling as I came to a red light and slowed the engine shut off and I was almost hit from behind. It took several attempts at starting before the car would start. This has now happened for the past 3 days and is happening more and more frequently. I do not have any other means of transportation and after attempting to get the dealership to check due to the recalls on the Mazda CX-5 for fuel pump failure and the mechanic saying it appears the fuel pump is bad the dealership refuses to attempt any repair because the VIN is not listed in the recall at this time. This is a severe safety problem because if it stalls in traffic I will be in an accident as I have no ability to maneuver the vehicle when it stalls to get out of the way of vehicles approaching. If this issue isn't resolved it is going to cause injury to myself or others. People have had to swerve into the path of other vehicles to keep from hitting me when it stalls, which is eventually going to result in harm to others and/or myself and family.

- Lake City, FL, USA

purchase a new 2019 cx5 at riley mazda stamford. after 3 years and with 88t miles, the head gasket cylinder gasket needs a replacement for $4500. while searching i read the same complaints from 2019 cx5 owners about head gasket blownout. a TSB Technician Service Bulletin was release by Mazda in 2019 regarding this issue and another one 2021 with affected vin numbers included, this car is un drivable, oil leaks like water falls and burning smells along w

- Stamford, CT, USA

Crack in Cylinder Head at only 67,000 miles, leaking fuel into exhaust system, causing smoke while driving. Multiple shops consistently mentioned seeing this problem with this year, make and model. Due to 60k powertrain warranty, no fixes are being covered by Mazda

- Grand Rapids, MI, USA

After noticing a burning oil smell following an oil change, I brought my 2019 Mazda CX-5 Touring (42,000 miles) back to the Mazda dealership assuming an issue with the fuel filter. There were no warning lights/messages associated with the smell. The Mazda dealership inspected the vehicle and indicated the leaking oil was due to a cracked cylinder head, which was known issue covered under Mazda's warranty.

- Bourne, MA, USA

Vehicle warning system notified operator of engine overheating. Operator took vehicle to repair shop where mechanic identified a cracked cylinder head. Mechanic mentioned no reason crack should have occurred, potential manufacturer defect with forged aluminum casing.

- Carbondale, CO, USA

Oil light came on. Cracked cylinder head causing oil to leak in rear of engine onto exhaust system. This gives off burnt oil smell into vehicle passenger area. Concerned this could cause fire. Vehicle was taken back to dealer where it was found to be leaking. Dealer stated will order new cylinder head but does not know when it will be in. dealer stated drive vehicle until part comes in.

- Hannastown, PA, USA

The cylinder head is -??seeping-?? out oil Not a crack and not gasket failure Dealer service advises they could help us get it fixed IF ONLY we had receipts of oil changes. We do not because we change the oil ourself.

- Cedar Hill, TN, USA

My 2019 Mazda CX-5 has 61,500 miles on it and has a cracked cylinder head and has a massive oil leak. I took it to the dealer and they are aware of this issue but told me Mazda hasn't so far made a recall. No warning lights went off and i lost 1 quart of oil over a 30 mile drive. Upon Acceleration the engine could seize and could cause a crash. A fire is also not out of the question as the parts in the engine area are hot and oil can catch fire. Mazda declined to pay for the total cost of the repair but did partially pay for some of it. They should be held accountable for the lousy design and it's only a matter of time someone will have an accident because of it.

- South Lyon, MI, USA

While driving the vehicle at highway speed, the check engine light came on at just under 28,000 miles. I took the vehicle to AutoZone, who did not come up with a code; however, I took it to the dealer with engine code P0126, which stands for insufficient coolant temperature. Apparently, there is a flaw in the coolant control valve, but the part is on backorder until June or July. In the meantime, my gas mileage is awful, my car takes forever to warm up, and the engine performance is awful and the vehicle is not safe to drive at highway speeds. This really merits a recall and a whole lot more attention from a company that was Consumer Reports most reliable brand for 2022. I am really disappointed with Mazda and how they have handled this situation and they have permanently lost my business over this.

- Brook Park, OH, USA

I drove my wife to work and noticed that the car was stuttering and had weak acceleration. I parked in my garage and a couple of hours later returned to see a massive oil leak on my driveway, I had to tow the car to the nearest dealership where a cracked cylinder was diagnosed. There was also a terrible burning smell. If the massive leak happened on an acceleration ramp or on the highway there could have been an accident.

- Lansing , MI, USA

I was driving on the highway, at about 65 mph. The engine lost power and the car began to slow down. It did not respond to the accelerator, but the power was still on. I was lucky enough to be able to pull over to the shoulder without colliding, but it was extremely fortunate that no cars were obstructing me at the time. I put the car into park once stopped and turned the engine off. I tried to restart but the engine did not turn over and several warning signs came up on the dash and the car emitted irregular dinging/beeping noises before going silent (I do not recall specifically, but I believe the check engine and/or battery indicator lights came on) The hazards worked, also the interior lights. But I was stranded in a remote area in complete darkness on a very narrow shoulder with large trucks whizzing by. A CHP officer appeared eventually and expedited a tow truck, which brought me to the nearest Mazda dealership 100 miles away. It was midnight by the time we arrived. Both the tow truck driver and the technician (the next morning) were both unable to jumpstart the car. Engine would not turn over at all. The technician opened up the engine and sent reports to Mazda. We are waiting to hear back but they would not give me a loaner vehicle without knowing the cause of the failure. Very relieved I was not hurt but also very upset at the chance I could have been.

- South Lake Tahoe, CA, USA

The contact owns a 2019 Mazda CX-5. The contact stated while driving 40 MPH with the accelerator pedal depressed and shifting from second to third gear, the engine revved up, hesitated, and lost motive power. The contact was able to restart the vehicle. The check engine warning light was illuminated. The contact also stated that the low-beam headlights were inoperable. There was a clunking noise detected while making a three-point turn. The vehicle was taken to the local dealer and the mechanic diagnosed that there was an electrical failure. The vehicle was not repaired. The manufacturer was notified of the failure however, no further assistance was provided. The contact stated the failure was related to NHTSA Campaign number 19V497000 (Engine, Power Train). The failure mileage was approximately 1,000.

- Carlisle, MA, USA

1) It happened last week on 8/30, when I drove back home after work at night. After I parked my vehicle at the driveway and I had noticed there's smoke going into the cabin through the vent. The smell was very bad, it smells like burning rubber/plastic type. Then I went underneath the car and checked, the oil dripping out from the plastic panels where the oil pan is. Next morning, I jacked the car up and have a deeper inspection. I have notice the oil actually leaking from the Timing belt/chain cover area. I immediately called local dealership @ Putnam Mazda and drove it in for service on 8/31. When I arrived to the service department, my whole front end was full of smoke coming out from the hood. After a hour of inspection, service advisor told me that my car is having a blown cylinder #3 and oil leaks from cracked cylinder head. They will have to order a new cylinder head from Japan for my replacement, which will take more than 2 weeks or even longer due to part shortage. This is ridiculous!!! My car only have 21,500 miles on it, and it's a 2019 model year. The advisor told me they had quite a few were having the same issue. I guess he doesn't want to give me the exact numbers. But this is a safety concerns for other Mazda customers as well. I guess it has to do with the cylinder deactivation they put into the engine which cause this problem. The recalls that they had last year was not a fix or cure. 2) This is a safety concern and putting my life on risk, the oil leaks might cause fire or create accident on the road while operating. The smoke that I suck into my system may cause permanent damage to my lung and my health concern. 3) Problem had been confirmed with dealership. Mazda should declare a recall. You can't just wait for someone have an accident or cause their life to correct the issue. 4) The vehicle is at the servicer dept. and been inspected. 5) This is critical, I don't have any engine light or any indication. Even my scanner detected no code.

- San Francisco, CA, USA

The contact owns a 2019 Mazda CX-5. The contact stated that on five separate occasions, intermittently there was an abnormal grinding noise detected underneath the hood. The contact stated that while driving 65 mph, the vehicle inadvertently decelerated to 20 mph. Additionally, while accelerating the vehicle slowed down without warning. The vehicle was taken to an independent mechanic where no codes had been detected. The vehicle was towed to the local dealer where they were unable to duplicate the failure. The vehicle was not diagnosed nor repaired. Additionally, the vehicle was towed to Sport Mazda North (400 N US Hwy 17 92, Longwood, FL 32750, (407) 339-4777) where they were unable to duplicate the failure. The vehicle was not diagnosed nor repaired. The manufacturer was notified of the failure. The failure mileage was approximately 17,000.

- Longwood, FL, USA

Driving on highway, cruise control ser to 82, no cars in front. The car suddenly jolted twice, engine light and battery light comes, lost of power. Pulled over to shoulder in the middle of nowhere in Nevada. Tried to start the car, engine won't turn on, starter just kept cycling. Veh temp was just below 210 with a 1/4 tank of gas. Called dealership and service person asked is to use key to turn on car, no change and provided no other solution other than to take to dealership with the closest one being over 300 miles away. We decided to unhook and rebook the positive side of battery. Car restarted and currently driving it home as I write this complaint. 600 miles overdue for maintenance (by date due on July 26, 2021) and was scheduled upon return from trip which at the time should be approx 1000 miles over due.

- Sacramento, CA, USA

The contact owns a 2019 Mazda CX5. The contact stated that he noticed an oil leak on top of the engine. The vehicle was taken to compass Mazda (200 dolson ave lot a 204, middletown, NY 10940: (844) 258-3818) to be diagnosed. The contact was informed that the mastercycler needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 63,000.

- Bloomingburg, NY, USA

Brought it in Nov 2020 regarding smells and engine issues as well as alignment. Neither were taken care of. Then March 2021, engine was leaking fluid and smoking, and the engine needed to be replaced at 20K. Did not provide a rental until later that week. After a month, I got my car back. After leaving the engine continued to smoke, brought it back. Gave no rental. Dealer said it was left over fluid from when they replaced it. Car is still having issues with the engine and smells. Under shield fell off and needed to be replaced twice.tire pressure was going off and brought it in twice for them to say they cant find where the slow leak is or why so they wouldn't fix it even though I have the Mazda insurance for tires.

- West Islip, NY, USA

Vehicle having significant drop in power output in 1st and 2nd gear when ambient temperatures below freezing. Issue resolves when finally shifting to 3rd gear, but lack of predictable response when merging is unsettling.

- Chesapeake, VA, USA

The contact owns a 2019 Mazda CX5. The contact stated that the engine failed. The driver noticed that engine oil was leaking on the ground. The vehicle was towed to an unknown dealer whom advised that the engine needed to be replaced. The engine was replaced. However, the repair did not correct the failure. The vehicle cabin filled up with smoke when the contact drove the vehicle home and the contact found that the engine was leaking oil. The vehicle was towed back to an unknown dealer for inspection. The vehicle was not repaired. The manufacturer was contacted. The approximate failure mileage was 7,800.

- Scott Township, PA, USA