Noticed an oil smell when driving the vehicle, slightly premature to when it was due for an oil change. Engine was emitting light blue smoke when parked after driving for more than 20 minutes. Took the car to a Mazda dealership to get serviced two days after noticing the issue and was told that the cylinder head was cracked and needed to be replaced. There was oil leaking from the vehicle, which I had not noticed, and it had soaked a lot of the front undercarriage of the car. Research into the effects of an oil leak indicate that it can cause a serious malfunction of the engine and other components of the car, but I did not experience that in the time of noticing the problem and taking the vehicle to get serviced. The problem was diagnosed by the service department at a Mazda dealership and is being repaired there. The oil indicator came on a day after noticing the smell.

- Golden, CO, USA

The cylinder head and timing cover are leaking oil and need to be replaced. It is at the dealer and available for inspection. The car started smoking and lost oil obscuring my vision. The problem appears to be well known by the dealer and they were able to diagnose the issue. The vehicle has only been inspected by the dealer where I purchased it. There were no warning lamps, messages or other symptoms. This vehicle has had regular maintenance per the manufacturers specifications since it was purchased new.

- Laguna Beach, CA, USA

Oil started to leak along with a burning smell, ended up being a cracked cylinder head at 77k miles. It was not in an accident & it did not overheat. But it appears this is a known issue with this make, model & year. Now Mazda only wants to pay $1k of $5k charge. I bought the dealers extended warranty, up to 75k miles, which apparently means nothing. My next car will not be Mazda.

- Yukon, OK, USA

Cracked cylinder head at 75000 miles causing oil to leak, Mazda dealership called it a fire risk

- N. Middletown, NJ, USA

Head cracked at just under 49,000. Oil dripping on exhaust entering cabin continuously. This issue was identified by Mazda to dealers in 2021 via Mazda TSB SA-031/21. Despite having our vehicle serviced multiple times at the Puyallup Mazda dealership after that date, no mention was made of this noted defect. We drove for about a month inhaling the petroleum fumes often thinking it was from trucks ahead of us on road. Dealership replaced the head assembly but since car was 4 months out of warranty (we are the original owners having purchased it new from this dealership) the dealership insisted on charging us for repairs. We've been breathing fumes from a known issue and others may be as well due to faulty manufacturing the manufacturer and dealer refuse to take full responsibility for.what is clearly a defect.

- Lake Tapps , WA, USA

2018 Mazda CX-5 with roughly 52,000 miles on it was emitting a burnt rubber smell and white smoke from the engine. Repair shop thought it was a bad timing lock. Replaced that and car continued to emit white smoke and smell like burnt rubber. Engine then began leaking oil. Took the car back to the repair shop and it was confirmed that the engine had a cracked cylinder head. The repair shop said this is a known issue with 2018-2019 Mazdas. In three days time, the engine leaked roughly 1 quart of oil and was deemed not safe to drive by the repair shop.

- Chesterfield, MO, USA

My 2018 Mazda CX-5 had a rubber burning smell and smoke leaked into the cabin. I noticed the next morning, oil leaked onto my driveway. I brought the car to the dealership and they mentioned it was a cracked cylinder head. My car has approximately 49,200 miles on it and it about 5.5 years old. It is under the mileage limit for powertrain warranty but slightly over on the age limit for powertrain warranty. Mazda informed me that they would cover roughly 37% of the repair costs that the dealership quoted me. I've read online on various Mazda forums that many owners are dealing with the same issue and Mazda admitted that a batch of heads have a manufacturing defect. Owners on this forum mentioned Mazda covered 100% of the repair costs for cars that were out of warranty due to this being a known manufacturing issue. I think the proposed coverage that Mazda provided me is insufficient.

- Port Chester, NY, USA

There a oil leak either engine cylinder crack or head gasket leak and the car only has 53000 miles when warranty just expires. After searching on the internet, there seems to be many similar cases. Mazda should recall this issue.

- Garden Grove, CA, USA

We own a 2018 Mazda CX-5 which developed a cracked cylinder head after slightly over 53,000 miles. We had oil leaking in our driveway and our dealership advised us not to drive it as this would be an extreme safety issue. I was advised to contact you as this seems to be an ongoing issue with Mazda CX-5's from 2018-2021. There is a safety bulletin TSB #SA-031-21. I am hoping this will help with resolving this with Mazda costumer service.

- Comstock Park, MI, USA

There was a TSB #[xxx] for the repair of Cracked Cylinder Head(s). Our 2018 CX-5 incurred a Cracked Cylinder Head at 5,418 miles. This was under the 60,000-mile power train warranty, but after the 5-year term had expired ([XXX]). Our issue started in late January '24. The car had been serviced at the Mazda Dealership in Hyannis, MA until my wife bought a '21 CX-5 model and gave the '18 model to our college son in FL. The TSB was for '18 - '20 models - which has now been increased to the '23 CX-5s. Mazda US would not help us in any way with the engine replacement that the Mazda dealership in Tampa replaced with a '23, 4,000-mile engine. $ $7,462.89 'new' engine that has a '23 engine that could incur the same issue! Also, my wife's newer model, '21, could also be a lemon for the TSB. We're looking for Mazda to step up for it's (loyal) clients! The work was completed and paid for on [XXX]. Mazda reviewed our case ([XXX]) and declined to assist. A reliable vehicle, Mazda, with an engine at 54,000 miles should be cared for by the manufacturer. The reason the time expired and the mileage was low was due to the lack of driving during the Covid era. We have researched online the number of cases for Mazda and the CX-5's issues with the cylinder heads. We are looking for a government interaction to assist consumers like us. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- South Yarmouth, MA, USA

Engine head has crack on it, causing oil to leak out and burn and smoke. In order to replace the engine/crack, manifold need to be removed. Leakage is in the back of the engine. This must be manufactured defect. My Mazda has less than 45000 mile on it. Unfortunately warrantly is no longer valid. Unless a recalled is issue, a repair will be free of charge to current owner. Other wise operator has to constantly keep adding oil.

- Springfield, MA, USA

Hydraulic lift adjuster failure causing loud engine knocking. Vehicle cannot be driven and costs thousands of dollars in repairs. The engine is only at 42,000 miles.

- Ballston Lake, NY, USA

Cracked cylinder head oil drips onto exhaust manifold smoke gets into cabin and could cause fire on exhaust manifold car was purchased used 5/22 and with 46732 miles and now has 74000 in 2/24 it is now at central Maine Chrysler jeep where we purchased it having repairs done under extend warrantee that we bought with the car.we spoke with the service department at a mazda dealer and they said it is very common i feel that mazda should recall it passengers should not have to breath oil fumes or risk being in a car fire we are lucky to have purchased the warrantee but without it the repairs would be to cost prohibitive for the average person thanks

- Oakland, ME, USA

Transmission is continuously jerking at lower and higher speeds While driving in traffic or in parking lot areas

- Worcester, MA, USA

vehicle stalls with three warnings showing at high speeds (over 55 mph) Errors dashboard: 1. Smart brake system malfunction 2. Forward smart brake system malfunction 3. Front radar sensor system malfunction

- Joshua Tree, CA, USA

Vehicle engine has stalled multiple times at low speeds. Vehicle will not restart immediately. In order to get vehicle to restart, gas must be revved while pressing start button to get engine to restart. It appears as if fuel is not being delivered to engine. Electrical components remain functional. Vehicle was inspected by dealer and issue could not be recreated. No issues were found. No warning lights displayed or codes found upon inspection. No symptoms of problem; occurrence is sporadic. It has caused traffic and safety hazards due to stalling in roadways.

- Newport, PA, USA

-cylinder head cracked resulting in leaking and burning oil from rear of cylinder head by exhaust manifold. Car has since been repaired by Mazda, but pictures are available from the incident. -Car was unsafe to drive due to leaking oil all over road (Environmental risks and hazard to others), black smoke and burning smell circulated into cabin via AC (health risks to passengers). Prolonged driving in this condition would have resulted in loss of oil and further damage to the car and others. -Car was towed to independent service center then subsequently towed to Mazda dealership -Mazda dealership inspected and confirmed that it was a manufactured defect that they have seen with other cars. Mazda has a Technical Service Bulletin (TSB) issued as well. -No warning lamps appeared prior to observed smoke and leak, though it was noticed that the car did jerk slightly at times when stopped at a traffic light

- Daly City, CA, USA

Cylinder crack. Recently got a oil change and driving to work couple days after and smelled oil burning into my cab and smoke coming from underneath my hood. Got to work and opened my hood and noticed large amount of oil on belly and leaking oil from my cylinder. I got this vehicle thru a dealership and when contacted, they stated if I pay $7,500 I could get a trade in!!! After numerous searching, I've found a lot of owners with the 2018 Mazda CX-5 are having the same issue with cylinder heads and no corrective actions. Now I have to pay Mazda (after their defective parts) for their mistakes

- Copan, OK, USA

This vehicle has stalled out while driving at least 4-5 times since purchasing it in 2018, although issues started about 2020 or 2021. It usually starts with the radio console either malfunctioning or going dead completely while I-??m driving and several minutes later (usually after stopping at a red light but sometimes while actively driving) the car stalls out in the middle of traffic. It starts up after few minutes but it-??s a very dangerous situation. It also sometimes hesitates when putting my foot on the gas, as if there-??s a fuel injection problem. I already got all the recalls fixed but there-??s obviously other significant problems with this vehicle. If it causes me to get injured I will be taking legal action.

- Waianae , HI, USA

Crack Cylinder Head less than 50,000 miles

- Baltimore, MD, USA