2019 Mazda CX-5: check engine light

Filed Jun 9, 2026 · Engine · PA

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

Filed Feb 25, 2026 · Fuel system · TX

My fuel pump burned out after only 60k miles.... very expensive repair. Mazda said the problem was only with the early 2019 models so mine wasn't included yet my fuel pump did exactly what the ones included in the recall did, but I was left with over $1700 repair bill to replace the fuel pump. Obviously the "improved design" used in the second half of the year isn't really improved, and I've never had to replace a fuel pump on a vehicle with so few miles on it. We were sitting idle waiting for food at a restaurant and the engine just died and we were unable to re-start the vehicle. No issues prior to this, always kept fuel at least 1/4 tank or more full and no engine warning lights until AFTER the engine died.

Filed Dec 19, 2025 · Engine, Fuel system · VA

Drove 39 miles, around ~55 minutes. Parked the car, realized that I parked a little too far from the spot, car just stalled while rolling. Pressed accelerator, nothing. Turned off the car, tried to start again, it cranked but didn't start. Had to tow it to the nearest mechanic (total of ~2 hrs until my car got picked up and dropped off), mechanic calls me and tells me my car started fine. I'm thinking it could be 5321K recall but not sure as my VIN is not in the recall nor did I get any recall notice. What component or system failed or malfunctioned, and is it available for inspection upon request? - No idea. How was your safety or the safety of others put at risk? - Got stranded for hours in the parking lot. Has the problem been reproduced or confirmed by a dealer or independent service center? - No Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? - No Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? - Yes, fuel cap like icon and check engine light were on when trying to start the car after it stalled. The car would crank but not start.

Filed Aug 22, 2025 · Engine · CA

Timing cover oil leak. This is the same issue reported in technical bulletin #01-006/23 issued on 04/26/2023. There is oil leaking and the engine is smoking. No engine warning lights or other messages appeared. My car is a 2019 mazda CX-5 and has 31,954 miles. This problem has been confirmed by both an independent mechanic and the dealer service center. On 08/22/2025, I took my vehicle to dealer service for the repair. I also submitted a ticket to Mazda care for review of the case.

Filed Jul 24, 2025 · Driver assistance, Electrical · KS

When accelerating, the transmission feels jerky/stutters. The check engine light and traction control light are illuminated and on the instrument cluster the messages: "Forward Smart City Brake Support Malfunction", "Smart Brake System Malfunction" and "Front Radar Sensor System Malfunction" appear. The vehicle acts like it doesn't know which gear it should be in, it'll buck pretty hard and then it refuses to accelerate...it feels like it's in a "limp mode". A previous driver of the vehicle complained and said that it actually stalled in traffic on the highway and was of course difficult to steer due to loss of power. I took it to a dealership and they came up with a laundry list of things to fix...most of which wouldn't have any bearing on this issue. I did have the serpentine belt replaced and the belt tensioner replaced due to wear on the belt and loose tension. On 7/16/25, I scanned the vehicle with a code reader, the codes P0301 and P0506 appeared. P0301 is a generic "Cylinder 1 Misfire Detected" message and P0506 is a generic "IAC system RPM Lower Than Expected. The vehicle was taken to a shop where the spark plugs and the cylinder 1 coil was replaces and the IAC cleaned. On 7/24/25 the same vehicle behaviors were observed and the same warning lights and messages were activated. I scanned the vehicle and got "p0300 Random/Multiple Cylinder Misfire Detected and P0304 Cylinder 4 Misfire detected. There was a recall on this particular vehicle make, model and year and my vehicle was out of the VIN# range. I firmly believe that the recall needs to be expanded to include a larger number of vehicles...you can google about this vehicle and see many others with similar issues. Usually, the cure is a PCM reflashing/software update that seems to take care of the issue. Please expand the recall before someone dies in an accident because of this problem.

Filed Apr 4, 2025 · Engine · 129,000 miles · PA

The contact owns a 2019 Mazda CX-5. The contact stated that while driving up on incline at 45 MPH, the engine shut off with the check engine warning light flashing on the instrument panel. Despite the failure, the contact was able to pull the vehicle off to the shoulder of the road. Due to the failure, the vehicle was towed to the residence. The following day the vehicle was towed to an independent mechanic; however, the mechanic was unable to duplicate the failure. The mechanic replaced the spark plugs and the ignition coil. The mechanic referred the contact to the dealer for additional assistance. The contact drove the vehicle to the dealer with an abnormal rumbling sound coming from the vehicle. While at the dealer, the dealer was unable to determine the cause of the failure. The contact was provided an estimate for repairs unrelated to the failure. The manufacturer was notified of the failure and provided a case number. The vehicle was not repaired. The failure mileage was a 129,000.

Filed Mar 11, 2025 · Engine · OH

Cracked cylinder head. Major oil leak. Oil light came on but then turned off. No other warning light. No engine light came on. The vehicle was taken to the dealer for diagnosis.

Filed Jan 14, 2025 · Engine · MI

As I was driving, a burning smell emanated from the car. There were no check engine lights on. When I pulled over, I saw a lot of smoke coming from the engine. I checked the oil level and it was above the minimum line bit just barely, even though my husband had just done an oil change on it. I refilled the oil and continued on my trip. The problem repeated for several dqays until I got home and took it to the Mazda dealership. They reported the following: "Cylinder Head Assembly: oil leaking out of back of head, recommend replacing cylinder head and related gaskets. The cylinder head sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket. In most engines, the head also provides space for the passages that feed air and fuel to the cylinder, and that allow the exhaust to escape." This service is $5600! My car only has 80K miles on it. This is a safety issue because there was no warning. No check engine light appeared and there was no warning.

Filed Jan 3, 2025 · Engine · OH

My 2019 Mazda CX-5 suddenly developed a major oil leak within the last 7 days. My car has only 44,350 miles and I have had all scheduled and required maintenance completed timely, including oil/filter changes, coolant level checking and maintenance, etc. I took the car to an independent mechanic who diagnosed the problem as a cracked cylinder head. I then took the car to a local Mazda dealer who confirmed the diagnosis and informed me that there would be no warranty coverage as my 60,000 mile/60 month powertrain warranty had expired 60 days earlier. Some two years earlier my car's check engine light came on and overheated. I took it to the same local dealer, who replaced the coolant control valve & related components. In November 2024 I received a "Warranty Extension Program" letter from Mazda about the same fail-safe thermostat problem. I believe this is relevant and related to the cracked cylinder head since almost all instances of a cracked cylinder head are due to engine overheating. This issue put me at risk as I was close to driving the car with no oil and oil leaking heavily onto very hot engine components that could have resulted in a fire. I am now facing repairs to this car between $4,800 and $6,000 and given the faulty/defective cylinder head from Mazda, I could face this safety issue again, as it will be replaced with a similar cylinder head from Mazda!

Filed Dec 29, 2024 · Engine · VA

I started to smell a burning smell while I was driving and noticed smoke coming from under the hood along with the burning smell. When I parked the car I noticed a bunch of oil leaking from under the car. I took the car to get checked out and there was oil all under the bottom of the car and it was confirmed that there was a very bad oil leak which occurred due to a crack in the cylinder head. No check engine lights or any indication of this issue aside from discovering the burning smell, smoke from under the hood, and a significant amount of oil underneath the car. The car hasn’t been driven in a month because of this issue. When you turn the car on you can hear a ticking sound coming from under the hood. The bad part is there was no indication. A 2019 with 50,000 ish miles shouldn’t have this problem and I confirmed that with mechanics and Mazda. This is a safety risk as you can’t safely drive the car without being concerned about the lack of oil in the car due to the leak as well as the smoke coming from under the hood, not being able to drive the car thus resulting in needing the car towed in order for the car to be serviced for this problem. I was told that if the oil continues to leak and if I was to drive it the engine could start to have issues and possibly turn off due to the leakage. This leak had oil all over the exhaust system as well.

Filed Nov 17, 2024 · Brakes, Electrical · TN

The steering and braking systems on my vehicle malfunctioned after jumping my vehicle when the battery drained too far to start, or even power my cars baseline electrical systems. After jumping my car, I started backing out of my parking spot and when I turned the wheel it very violently jerked in a manner that could have hurt me if I'd been holding onto the wheel tighter. Around this same time I believe I recall the brakes automatically applying and halting the vehicle. I was too far out of my parking spot when this began occurring and had to try to maneuver into a different one, during this attempt both of the conditions described above reoccured several times. I eventually noticed that it only seemed to trigger when the wheel was at more extreme steering angles, by keeping the steering angle lower I was eventually able to maneuver into another spot without triggering the issues. After parking and letting the car run for a bit to recharge the battery I no longer experienced these issues. There were several warning lights related to roll stability control, lane departure monitoring before pulling out. The following warnings were present, but I'm unable to recall whether they displayed before I first hit the issues: Smart Braking Malfunction, Power Steering Malfunction, Transmission Malfunction, Check Engine Light. The vehicle has not yet been inspected by anyone, however I was able to find evidence of other people complaining about what sounds to be the same issue going back several years online. [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 15, 2024 · Engine, Transmission · TX

The vehicle starting stalling, check engine light would come on, and the vehicle would slipped into “limp mode” while traveling on the freeway. I was amount in two auto collisions because of the vehicle slowing down in the middle of the highway. The problem started in August 2023 and was towed to the dealer on one occasions and towed to my home on another occasion. The dealer ran a diagnostic and said it was the brand new battery I had installed and then the catalytic converter. After repairing both; the vehicle proceeded to not drive over 30 miles per hour. The dealer said it was the engine and then said it was something else. I’ve expressed that the symptoms are those more aligned to the PCM issue recalled on 2019. A actual diagnostic report from Auto Zone supports this. The vehicle has also been inspected by another Mazda dealer and a stand alone mechanic.