Engine And Engine Cooling Problems of Mazda CX-5 - part 1

Mazda CX-5 owners have reported 532 problems related to engine and engine cooling (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mazda CX-5 based on all problems reported for the CX-5.

1 Engine And Engine Cooling problem of the 2025 Mazda CX-5

Failure Date: 08/23/2026

The vehicle exhibits a repeatable low-speed driveline-related problem consisting of pronounced clicking or clunking from the driver-front area, fore-and-aft jerking, and harsh engagement during deceleration and light on/off-throttle transitions, particularly around 15–17 mph; the behavior can become significantly worse over rough or uneven terrain. The exact failed component or system has not yet been identified. The vehicle is still essentially new, with fewer than 5,000 miles, and has not yet reached its first scheduled service interval, so it has not yet been formally inspected for this condition. No warning lamp or diagnostic message has appeared. Other owners online have described a similar low-speed clunking and jerking phenomenon, and Mazda has issued at least one prior transmission-related TSB addressing somewhat similar harsh shift behavior, although that bulletin does not appear to apply to this vehicle or this exact symptom. The vehicle is available for inspection upon request. The concern presents a potential safety risk because the vehicle can unexpectedly jerk, lurch, or abruptly change driveline load during ordinary low-speed driving, which can make accelerator response and vehicle speed less predictable in traffic, parking lots, intersections, or on uneven surfaces. The symptoms began within the first few thousand miles and remain repeatable.

See all problems of the 2025 Mazda CX-5 🔎.

2 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 08/21/2026

2019 Mazda Cx-5 developed p0192-00 fuel-pressure-related fault and significant loss of acceleration/limp mode. Mazda dealership diagnosed fuel rail/injector-seal issue and performed approximately $2,836 in repairs. The condition was not corrected. Dealer now diagnoses a high-pressure fuel-pump failure and is requesting an additional $1,459. Vehicle has experienced loss of power while driving. There is an existing Mazda fuel-pump recall affecting some 2018–2019 Cx-5 vehicles, but Mazda says my VIN is outside the recall population. I am concerned about a potential fuel-system safety defect.

See all problems of the 2019 Mazda CX-5 🔎.

3 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 08/10/2026

The contact owns a 2018 Mazda Cx-5. The contact stated that while driving at various speeds, the vehicle was leaking engine oil, and there was white smoke coming from underneath the hood. The contact stated that upon further inspection, there was a puddle of engine oil on the ground while the vehicle was idling. No warning light was illuminated. The vehicle was towed to a local dealer, where it was diagnosed with a cracked cylinder head. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 183,540.

See all problems of the 2018 Mazda CX-5 🔎.

4 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 08/04/2026

The contact owns a 2019 Mazda Cx-5. The contact stated that while driving at 55 mph and turning into a driveway, smoke emerged from the engine compartment. The vehicle was turned off and inspected. Upon opening the hood, smoke was observed near the rear firewall of the engine compartment, and oil was leaking under the engine compartment. The source of the leak could not be identified initially, and the vehicle was towed to an independent mechanic, where a leaking cylinder head was diagnosed. The vehicle was not repaired. The vehicle was then taken to a dealer, where it was confirmed that the cylinder head was leaking oil and needed replacement. The vehicle was not repaired. The manufacturer was notified of the failure, and a complaint was filed. The failure mileage was approximately 100,000.

5 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 07/30/2026

I own a 2019 Mazda Cx-5 awd equipped with the 2. 5l naturally aspirated skyactiv-g engine with cylinder deactivation. At approximately 70,491 miles, the vehicle began leaking and burning engine oil, accompanied by a strong burning-oil odor and visible white smoke from the engine bay. This began on or around 7/15/2026 I took the vehicle to an authorized Mazda dealer, which confirmed that the cylinder head is cracked and leaking engine oil. I was quoted approximately $10,000 to repair. The repair is not covered because the vehicle is just outside the factory warranty. I received regular Mazda dealership maintenance through 52,000 miles, then regular 3rd party shops after. The oil is leaking onto/near the exhaust manifold. Oil contacting the hot exhaust creates a serious fire hazard, which I can detect from the burning-oil odor and smoke. Separately, ongoing oil loss risks sudden engine failure or stalling while driving, which could cause a loss of motive power and a crash, especially at highway speed or in traffic. This appears to be a widespread manufacturing defect. Many owners of 2018–2021 Mazda Cx-5, and related Mazda3 and Mazda6 vehicles equipped with the 2. 5l naturally aspirated engine with cylinder deactivation, have reported the identical failure — cylinder head cracking near the exhaust manifold causing an oil leak — frequently at low mileage. Mazda issued an internal service alert (sa-058/20) addressing cylinder head cracking on these engines, which shows the manufacturer is aware of the defect. Despite this, affected non-turbo owners are being denied repair assistance and are paying thousands of dollars out of pocket to fix a defect that presents a fire and crash risk. No crash, fire, or injury has occurred. I am reporting this because the defect is safety-related, appears to affect a large number of identically built vehicles, and warrants investigation and a potential recall to protect owners — especially those outside the warranty period.

6 Engine And Engine Cooling problem of the 2023 Mazda CX-5

Failure Date: 07/02/2026

The vehicle experienced a sudden and complete engine stall while idling immediately after fueling the gas tank to capacity on a day with high ambient temperatures (over 100°f). Leading up to the stall, the vehicle was subjected to temporary auxiliary loads (max ac running and active steering input). Immediately following the stall, the vehicle exhibited a hard-start condition and would not catch fire. After sitting turned off for several minutes, the vehicle restarted normally. The incident left no diagnostic trouble codes (dtcs) or check engine lights. Independent of this event, the vehicle intermittently exhibits a raw gasoline vapor smell inside the cabin at idle, alongside slight hesitations during low-speed steering maneuvers. This presents a safety hazard due to unexpected loss of motive power immediately after refueling in high-traffic gas station environments.

See all problems of the 2023 Mazda CX-5 🔎.

7 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 07/01/2026

The contact owns a 2018 Mazda Cx-5. The contact stated that white smoke was coming from the engine compartment whenever the vehicle reached normal operating temperature. The contact stated that smoke entered the passenger’s side compartment through the air vents and was coming from underneath the hood. The contact stated that there was a burning odor coming from the engine compartment due to an oil leakage. The smoke impaired visibility while driving. The most recent failure had occurred while driving approximately 35 mph on a city roadway. The vehicle was driven to an independent mechanic to be diagnosed, and then to the dealer for further inspection. The independent mechanic diagnosed the vehicle with a cracked cylinder head and recommended that the vehicle be taken to the dealer for additional diagnostic tests. The dealer diagnosed the cylinder head as porous and informed the contact that the cylinder head needed to be replaced. The manufacturer was notified and informed the contact that the repair would not be covered. The vehicle was not repaired. The contact stated that the failure had occurred intermittently and became more frequent and severe during hotter weather. The failure mileage was approximately 83,000.

8 Engine And Engine Cooling problem of the 2021 Mazda CX-5

Failure Date: 06/26/2026

The vehicle developed an engine oil leak from the timing cover due to what appears to be premature seal failure. Engine oil was leaking externally and could drip onto hot engine components, creating a potential fire hazard while the vehicle is in operation. The leak also increases the risk of low engine oil levels, which could lead to engine damage or sudden engine failure if not detected in time. This issue required an expensive repair despite the vehicle being properly maintained. I have since learned that many other Mazda owners have reported similar timing cover oil leaks on this engine, suggesting this may be a widespread defect rather than normal wear and tear. I am submitting this complaint so NHTSA can evaluate whether this represents a safety-related defect that warrants further investigation.

See all problems of the 2021 Mazda CX-5 🔎.

9 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 06/23/2026

The contact owns a 2018 Mazda Cx-5. The contact stated that while his wife was driving at an undisclosed speed, there was smoke coming from under the hood. No warning light was illuminated. The contact's wife pulled over and discovered that there was oil leaking onto the ground. The vehicle was towed to the dealer, who determined that the #5 and #7 cylinder heads were cracked and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 100,000.

10 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 06/17/2026

I am the owner of a 2019 Mazda Cx-5 with approximately 50,000 miles. I am experiencing an active engine oil leak accompanied by a burning smell and visible smoke from the engine compartment. This is consistent with a cracked cylinder head assembly — a known manufacturing defect in 2018–2021 Mazda Cx-5 vehicles documented in Mazda's own service alert sa-031/21, which Mazda characterizes as a fire hazard. Despite this, Mazda has extended warranty coverage only to turbo-equipped models (program csp11), leaving non-turbo owners with the identical defect unprotected. At only 50,000 miles, this is a premature failure caused by a manufacturing defect — not normal wear and tear. Oil leaking onto a hot exhaust manifold constitutes a serious fire risk to vehicle occupants and the public. I am requesting that NHTSA investigate this pattern of failure across 2018–2021 Mazda Cx-5 non-turbo models and consider whether a formal recall is warranted. I have contacted Mazda north american operations directly requesting goodwill warranty coverage and have a case number on file. I have yet to hear a response but was initially informed my car was out of warranty.

11 Engine And Engine Cooling problem of the 2023 Mazda CX-5

Failure Date: 06/17/2026

Check engine light code p0524 - low oil pressure. Everything check out fine. Checked all the suggested TSB (technical service bulletin) possibilities from a respected and qualified service center. Cleared the code and it keeps coming back on.

12 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 06/12/2026

I am submitting this complaint regarding a cylinder head failure on my Mazda Cx-5. The vehicle has approximately 53,000 miles and has been properly maintained throughout its service life. The vehicle developed a crack in the cylinder head, which was subsequently confirmed by an authorized Mazda dealership. Mazda has previously issued a technical service bulletin (TSB) addressing cylinder head cracking on certain vehicles; however, my vehicle's VIN is not included in the covered range despite experiencing the same failure described in the TSB. The dealership initially provided a repair estimate of $8,789 plus tax to replace the cylinder head. Following further discussions, the dealership reduced the repair cost to $3,903 plus tax. They recognize that this crack is not part of normal wear and tear but due to the VIN number not being included in the recall are unable to provide full coverage. A cylinder head crack is a major engine failure that should not occur on a well-maintained vehicle with only 53,000 miles. I am concerned that vehicles outside the VIN range identified in Mazda's TSB may be experiencing the same defect and that the scope of the issue may be broader than currently recognized. The vehicle was purchased used from the same Mazda dealership that diagnosed the failure and is currently performing the repair evaluation. I respectfully request that NHTSA review this issue to determine whether additional Mazda Cx-5 vehicles may be affected by the same cylinder head defect despite not being included in the existing TSB.

13 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 05/26/2026

My 2019 Mazda Cx-5 (equipped with the 2. 5l naturally aspirated skyactiv-g engine with cylinder deactivation) has experienced a severe structural failure resulting in a cracked engine cylinder head. This casting defect allows pressurized motor oil to leak continuously from the cylinder head down onto the hot engine block and nearby exhaust components. This has led to the following severe safety risks: engine oil is leaking onto the exhaust manifold and creates an extreme risk of engine compartment fire when the vehicle is in motion; sudden loss of oil pressure or complete structural failure of the cylinder head can cause the engine to stall or seize unexpectedly without warning, completely disabling the vehicle in live traffic and creating an imminent crash hazard; and dropping oil levels and leaking fluids burning against the engine produce strong smoke and chemical odors that enter the cabin, which can cause driver distraction and severely limiting visibility if smoke escapes through the hood. We are also inhaling these odors. Mazda is fully aware of this structural engine defect and has detailed it internally under technical service bulletin TSB #sa-031-21 (as well as related tsbs for oil seepage/leaks on these cylinder heads). Despite acknowledging the manufacturing flaw, Mazda has failed to issue a safety recall for this dangerous fire and stalling hazard, forcing consumers to drive unsafe vehicles or pay thousands of dollars out of pocket for a known defect. The vehicle currently has 62,317 miles. The crack and oil leak were officially diagnosed by the carlsbad Mazda dealership service department on 5/26/26. I am requesting that the NHTSA launch a formal safety defect investigation into Mazda 2. 5l cylinder head cracking to force a safety recall before this defect leads to a fatal fire or highway accident.

14 Engine And Engine Cooling problem of the 2024 Mazda CX-5

Failure Date: 05/22/2026

My car caught on fire on [ccc] and it's completely burned down, a total loss. Following is information about my car and some summary of what happened. Car information: - Mazda cx5 2024 - bought in June or July 2024(car payment only made 22 times so far) - odometer 24,445mi(as of 05/15/2026) what happened: - in [xxx] Friday afternoon, I was in bellevue and noticed an engine overheat warning. So, I stopped immediately to cool down and called Mazda dealership(lee johnson Mazda) to schedule a service. - then after 20-30 minutes, I started the car again and the warning was gone. So I drove slowly and got on [xxx] to head home in kirkland. I was already driving slowly. - after a few minutes, overheat warning as well as engine warning started firing and noticed that smoke coming out of bonnet. - so, I pulled over on the shoulder near [xxx] and called roadside assistance. But even before I get connected to the roadside service, engine caught on fire and I had to call 911. - the car is completely burned down and it's a total loss. - state patrol wrote me a "exchange of information" and "tow/impound and inventory record". Why I am submitting this form: - this car is less than 2years old and has been seeing Mazda service regularly. The odometer checked by dealership on 05/15 is 24,445mi which is slightly more than 24,000 which is stated in the lemon law. But still, the car is pretty brand new and around 24,000 ish. So, I'm wondering if this still qualifies for lemon law. - even before this happened, I had a service history for engine warning and get the engine checked on 05/15/2026 which is exactly a week ago before the accident. Also, they said the engine thermostat had an issue and replaced and covered by Mazda's warranty. - overheat and engine warning was on and off. As soon as I pull over, it caught on fire. - this happened on [xxx]. It was very dangerous and lucky that we pulled over on right before it caught on fire information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2024 Mazda CX-5 🔎.

15 Engine And Engine Cooling problem of the 2020 Mazda CX-5

Failure Date: 05/22/2026

Cylinder head has failed at 53,000 miles. Mazda has a technical service bulletin acknowledging that this is a common occurrence with this part. They have an extended warranty for the turbo engine but not for the standard engine. Looking through online forums, there are hundreds of not thousands of these issues for this model year and engine. Mazda has clearly acknowledged there is an issue and should repair these manufacturing defects that are not normal wear and tear items.

See all problems of the 2020 Mazda CX-5 🔎.

16 Engine And Engine Cooling problem of the 2025 Mazda CX-5

Failure Date: 05/21/2026

On may 21st , 2026, while waiting in line to make a right turn (positioned 3rd in queue), the vehicles ahead moved forward. As I transitioned from the brake to the gas pedal to follow, the vehicle experienced an instantaneous engine stall and total electrical failure (not an I-stop event). Pressing the gas caused the vehicle to slowly roll backward. When I immediately tried to reapply the brakes, the brake pedal became extremely stiff and nearly impossible to press down, failing to hold the vehicle effectively. The driver behind me began honking aggressively due to the imminent collision risk. I attempted to lower the windows to signal the other driver, but all electronic controls were completely dead. I had to quickly shift the gear into park (p) and hit the start button to successfully restart the engine, which temporarily restored functions.

17 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 05/15/2026

Cylinder block cracked on back side of engine. This crack leaks oil onto the exhaust manifold. Condition confirmed by Mazda dealer. Oil burns on the exhaust filling the cabin with smoke impairing the driver. Also a high risk of combustion in the engine compartment inspection report and pictures available. No sign or warning of issue. Crack happened on a daily drive to work. No engine lights noise or smell until head suddenly cracked causing a large oil leak. Mazda has an internal TSB 01-002/23 admitting that these cars in this year range have a manufacturer defect in the block.

18 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 05/15/2026

We purchased this vehicle used from Mazda of orange in July 2025 with 52,399 miles on it. After 6 months of ownership and approximately 3,000 miles there was a burning smell. We took it to our local mechanic and the following repairs were required: replacement of cracked belts, replacement of cracked axle boots, replacement of an excessively loose front axle, replacement of valve cover gasket. Cost was $3,000 and the dealer refused to reimburse us. Now the car is leaking oil and needs a new head gasket and cylinder head surface machined. Quote was approximately $3,500. We have requested Mazda perform this repair. Will you please look into these vehicles? these are significant defects on a car with such low miles. We also believe that some of these defects were know to the dealer but are unable to prove it. We believe our vehicle is part of a batch that has signficant mechanical defects. Current mileage of the vehicle is 56,865.

19 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 05/13/2026

Like many other complaints. My 2018 Mazda cx5 gt is having the same issue with the cracked cylinder head. I only have about 36-38k mileage on it ( I forgot the exact). Mazda dealership will not cover the cost. Never had an accident to the front and only one accident to the back when I got rear ended in 2019. If this is a wide spread issue, why is this not a recall? and why is it only the turbo engine gets extended warranty? the repair cost right now approximately $9,500. I never do any maintenance at Mazda so I doubt they will give me the good will assistance but I am still waiting for an answer. I hope nhsta will do something because this issue will continue with all other owners that have the same year model.

20 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 05/12/2026

The cylinder head has cracked and is leaking externally. The engine oil that is leaking out is leaking directly onto the hot exhaust manifold. This can place us as risk due to the engine oil getting ignited by the hot exhaust manifold. There were no warning lamps that came on but there was a smell of burning oil that all of a sudden came up through the vents. This vehicle is currently at woodhouse Mazda in bellevue, ne and they have confirmed that the leak is active and has damaged the engine beyond repair.

21 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 05/11/2026

On may 11th I was driving my 2019 Mazda Cx-5 with approximately 35,000 miles when my cabin filled with the smell of gasoline. The smell became overwhelming within minutes, causing concern for my safety and the safety of other drivers. I immediately drove to the closest auto repair/body shop for an emergency inspection. Upon inspection, the technicians discovered there was a "crack at rear cylinder head and leaking oil excessively. Oil is leaking on to hot exhaust manifold. . . . Car is not safe to drive since oil leak is excessive". I was advised that this must be a manufacturer defect as you should not see this issue at such low mileage. The vehicle was then towed to the nearest Mazda dealership/service center, where a cracked rear cylinder head was diagnosed and confirmed. I was informed that continued operation of the vehicle could have resulted in catastrophic engine failure, engine seizure, fire risk from leaking oil contacting hot engine components, or sudden loss of power while driving, creating an extremely dangerous driving situation. Prior to the failure, there were no major warning indicators other than the sudden strong fuel/oil smell. The issue occurred unexpectedly despite the vehicle being properly maintained and having low mileage for a major engine failure. I have been the sole owner. The vehicle is currently available for inspection upon request.

22 Engine And Engine Cooling problem of the 2022 Mazda CX-5

Failure Date: 05/11/2026

Timing chain cover ended up leaking oil everywhere. Was told this was a known issue with Mazda Cx-5 and there was even a service bulletin out.

See all problems of the 2022 Mazda CX-5 🔎.

23 Engine And Engine Cooling problem of the 2021 Mazda CX-5

Failure Date: 05/10/2026

My 2021 Mazda cx?5 is experiencing excessive oil consumption. The vehicle is burning oil between regular oil changes, and the oil level drops noticeably before the recommended service interval. I have noticed a burning smell and/or signs of oil loss without visible leaks. This raises concerns about potential engine damage, stalling, or fire risk while driving. The issue has occurred repeatedly and does not seem normal for a vehicle of this age and mileage. I am filing this complaint because this may indicate a defect affecting engine safety and reliability.

24 Engine And Engine Cooling problem of the 2017 Mazda CX-5

Failure Date: 05/08/2026

The contact owns a 2017 Mazda Cx-5. While driving the vehicle, the engine overheat warning suddenly illuminated on the dashboard cluster panel. The contact pulled over immediately, restarted the engine, and coasted the vehicle to a local, independent mechanic shop. The independent mechanic diagnosed the issue as a blown head gasket. For a secondary inspection, the vehicle was transported to an authorized Mazda dealership. Dealership technicians determined that the engine cylinder was actually cracked and recommended a full engine replacement. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 92,000.

See all problems of the 2017 Mazda CX-5 🔎.

25 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 05/05/2026

This 2019 Mazda cx 5 is experiencing a crack in the oil cylinder. This appears to be connected there is no official, broad NHTSA recall for cracked oil cylinders in the 2019 Mazda Cx-5, but Mazda has issued a technical service bulletin (TSB #sa-031-21) to address this known issue. It affects certain 2018–2021 Cx-5s, particularly those with 2. 5l engines, where a cracked cylinder head leaks coolant or oil. If this is a known issue with this vehicle, why has a recall not been addressed?.

26 Engine And Engine Cooling problem of the 2021 Mazda CX-5

Failure Date: 05/05/2026

2021 Mazda cx?5 (VIN: [xxx] ). First low?oil warning at 17,800 miles. ([xxx]) Mazda dealership in la crosse, WI performed an oil change and fully refilled the oil. Second low?oil warning at 18,700 miles — only 900 miles later. ([xxx]) this indicates rapid, abnormal oil loss consistent with the known valve?stem?seal defect for this model year. Sudden low?oil conditions pose a safety risk due to potential engine damage or failure. Requesting NHTSA document this issue. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

27 Engine And Engine Cooling problem of the 2016 Mazda CX-5

Failure Date: 05/02/2026

The contact owns a 2016 Mazda Cx-5. The contact stated that the engine light illuminated. The vehicle was taken to an independent mechanic diagnosed with a sensor failure and needing to replace a catalytic converter. The oxygen sensors were repalced. R was replaced by an independent mechanic. The vehicle stalled while reversing. The manufacturer was not notified of the issue. The approximate failure mileage was 131,860.

See all problems of the 2016 Mazda CX-5 🔎.

28 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 04/27/2026

Another case of a 2018 Cx-5 cracked cylinder head. 70k miles and regularly maintienced. No warning other than oil showing on the ground. Took it in to Mazda dealership and they came back after looking at it and declared it was a cracked cylinder head priced at 6. 8k. After looking it up it appears to be a casting issue that has affected many Mazdas but Mazda corp. Will not take fault.

29 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 04/23/2026

I own a 2019 Mazda Cx-5 with approximately 36,000 miles. The vehicle developed a strong burning oil smell while driving, particularly through the hvac/vent system. I initially reported the odor to a Mazda dealership, but no issue was identified. Approximately two months later, the smell returned and worsened. The vehicle was later diagnosed by a Mazda dealership with an oil leak originating from the cylinder head near the exhaust manifold. According to the repair documentation, oil was accumulating on the exhaust due to seepage from the cylinder head. The repair required full cylinder head replacement. This created significant safety concerns because leaking oil was contacting hot engine/exhaust components while the vehicle was being operated. Burning fumes entered the passenger cabin through the vents while driving. I was concerned about the risk of fire, smoke inhalation, sudden oil loss, and possible engine failure while on the road. There were no warning lights prior to the failure. The primary symptom was the persistent burning smell. The dealership replaced the cylinder head. The original repair estimate was approximately $6,000. Mazda later provided partial goodwill assistance, but I was still required to pay approximately $2,500 out of pocket. After researching this issue further, I found numerous similar NHTSA complaints involving 2019 Mazda Cx-5 vehicles experiencing cylinder head leaks/cracking near the exhaust manifold, burning smells, smoke or fumes entering the cabin, and major engine repairs at relatively low mileage. Mazda has acknowledged similar cylinder head concerns in csp11 and TSB 01-002/23 for certain VIN ranges but denied coverage for my vehicle because the leak involved oil rather than coolant and because my VIN was outside the covered range. I am requesting that NHTSA investigate whether this represents a broader cylinder head defect affecting additional 2019 Mazda Cx-5 vehicles outside the currently covered VIN range.

30 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 04/22/2026

2018 Cx-5, VIN [xxx] , 60,182 miles. Skyactiv-g 2. 5l with cylinder deactivation (VIN 8th digit m). Head gasket leak diagnosed by independent mechanic and confirmed by Mazda dealer, who referenced service action sa-073/24. Oil actively leaking onto garage floor and contacting exhaust manifold, causing burning smell and potential fire risk. Defect was first documented by dealer at 52,966 miles within powertrain warranty. This is a known manufacturing defect affecting the cylinder head casting on 2018+ Cx-5 models with cylinder deactivation information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

31 Engine And Engine Cooling problem of the 2018 Mazda CX-5

Failure Date: 04/19/2026

My Cx-5 has 86,120 miles. I noticed a burnt oil smell coming into the car and later found oil droplets on my garage floor. I took it in to my neighborhood garage and they found an oil leak coming from the cylinder head. They recommended I take to my Mazda dealer. I had it towed to pearson Mazda, richmond,va. They inspected it and stated I had a cracked cylinder head. I have a 100k extended warranty that will cover most of the cost to repair it. However, I found the Mazda Cx-5 2018-2021 models have a cylinder head defect. I found a Mazda service alert, #sa-031/21 and on reddit a Mazda Cx-5 owners page that has many stories of the same problem, cracked cylinder head. Some have had Mazda cover the repair cost or given a major discount and provided an extended warranty after repair. I reviewed this with pearson Mazda and they stated that my car does not fall in the vehicle numbers that they will cover. This is a known issue and they will not acknowledge it for my car. I have contacted Mazda corporate and waiting for a callback. Litigation has been filed for the Cx-5 turbo customers and they have received restitution. This is also a major issue on non-turbo customer’s suvs. I have read that the 2018-2021 manufacturing (casting) of the cylinder head was defective. However, Mazda is not admitting it because a recall would cost them millions to fix the cylinder head issue on all the affected vehicles. But, they are at fault and should work with all customers that have been affected by this issue. Therefore, I am requesting NHTSA to make this a public safety matter and have Mazda be accountable for the issue. Thank you!.

32 Engine And Engine Cooling problem of the 2016 Mazda CX-5

Failure Date: 04/19/2026

My wife was driving our 2016 Mazda Cx-5, and was getting ready to pull into our daughters' driveway. My wife slowed down to a stop before entering the driveway. She gave the vehicle some gas to move forward. She stated that there was a pause, then the vehicle accelerated forward slamming into the garage door and the corner of the garage/house. There was also a Tesla parked inside the garage that was knocked back about a foot and a half. The distance from the edge of driveway and street to the garage door is about 27 feet. This happened at 1:30 pm. The weather conditions were great, sunny and dry. Thankfully, no one was hurt. If my wife was another foot to the right, she would have hit the support post for the upper balcony, and there would have been a good chance of the balcony falling on top of her. Or, if someone was standing in front of my wife when she entered the driveway, they could have seriously been hurt! there were no warning lights on prior to the accident. This happened last Sunday, April 19, 2026. We had the car towed to a local body shop on the same day as the accident. The vehicle was towed away the very next day to our insurance company's salvage lot in bakersfield. I do have all the information, address and phone number, of the lot where our car was towed to. Hopefully, the car can still be inspected by the proper authorities. Thank you for your time!.

33 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 04/17/2026

A Mazda dealership should me a Mazda cx5 2019, in 2023, at nearly 38k miles, right about where many have reported a cracked cylinder issue due to a manufacturing issue in age, and in milage. There is a lawsuit ongoing regarding the turbo version, however many reporting the same issue in the non turbo versions. My engine started smoking while on the highway causing a highly dangerous scenario to which I was barely able to make it to a mechanic where all the oil spilled out upon arrival. I got a diagnostic from a reputable mechanic confirming the cracked cylinder.

34 Engine And Engine Cooling problem of the 2024 Mazda CX-5

Failure Date: 04/16/2026

While driving on the freeway, the car stopped having the ability to accelerate. The engine light came on, and I received a notification on the Mazda app stating there was an "engine malfunction. " I took it to Mazda, and they told me nothing was wrong. Flash forward a month and the same exact situation occurred. I took it to Mazda, and they told me the same thing. This is incredibly dangerous, as losing the ability to accelerate on a very busy freeway is life-threatening.

35 Engine And Engine Cooling problem of the 2019 Mazda CX-5

Failure Date: 04/15/2026

The cylinder head cracked, causing a coolant leak, which then lead to the car overheating. My car was taken into Mazda dealership because there is a warranty extension for this specific part csp111. The Mazda dealership, corporate, and warranty department all stated the known widespread defect cracked cylinder head will not be replaced on their behalf due to an overheating code. Mazda is using a symptom as an excuse to the problem. Due to the overheating code, Mazda recommended replacing the whole engine for $10,000 with 20 hours of labor. This defect part and Mazda’s unwillingness to provide a proper solution caused my car engine to fail, posing a safety risk. No symptoms other than low coolant were present, which my car was then parked, not driven, and towed to the dealership, in hopes the warranty would be honored.


Other Common Engine And Engine Cooling related problems of Mazda CX-5


CX-5 Service Bulletins