2021 Mazda CX-5: check engine light

Filed Sep 24, 2026 · Engine · 124,000 miles · MI

The contact owns a 2021 Mazda CX-5. The contact stated that while driving 50 MPH and the check engine warning light illuminated. The contact took the vehicle to an independent mechanic where an OBDII scanner discovered a misfire in cylinder#1. The vehicle was then taken to another independent mechanic where the OBDII scanner discovered a misfire in one of the engine cylinders and diagnosed the vehicle with an engine failure. The contact was then referred to the dealer who confirmed that there was a defect with cylinder#1. The dealer confirmed that the engine needed to be replaced. The manufacturer was then notified of the failure, and the contact was informed that there were no recalls on the vehicle and that the warranty had expired. The vehicle was taken to another independent mechanic and remained with the independent mechanic. The failure mileage was approximately 124,000.

Filed Mar 27, 2026 · Driver assistance, Engine · 114,000 miles · TX

The contact owns a 2021 Mazda CX-5. The contact stated that while driving at an undisclosed speed, the Forward Collision Avoidance Automatic Emergency Brakes activated unintendedly, and the vehicle jerked to the left and independently accelerated and moved back in the lane intended lane. The vehicle then jerked to the right, unintendedly accelerated, and then went back into the intended lane. Then the vehicle resumed normal operation. While driving approximately 60-65 MPH a week later, the vehicle started jerking. The “Smart City Brake Malfunction” message was displayed, and the engine warning light was illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 114,000.

Filed Oct 31, 2025 · Brakes, Engine · 81,000 miles · NJ

The contact owns a 2021 Mazda CX-5. The contact stated that the Front Brake System Malfunction, Forward Brake Malfunction, and Check Engine warning lights were illuminated. The contact stated that while driving at various speeds, the vehicle started jerking and hesitating as if the wheels would lock up. The steering wheel vibrated while turning to the left or the right. The vehicle was taken to the dealer, who was able to retrieve a diagnostic code; however, the DTC number was unknown. The dealer was unable to identify the exact cause of the code. The vehicle was not repaired. The manufacturer was informed of the failure and opened a case. The failure mileage was approximately 81,000.

Filed Dec 1, 2024 · Engine · NY

Check engine oil light came on after only 2K miles from last oil change. Upon inspection there was practically no oil in my engine!!! I see there is an ongoing issue since 10/21 with 2021 Mazda CX-5 turbo engines. Despite Mazda’s awareness of the problem, they have yet to issue a recall to fix this issue!!!

Filed Feb 8, 2024 · Engine · MA

I thought this was for a mechanical issue (not a safety issue). Check engine light came on not blinking. Was code p0126 covered in bulletin 01-005/23 - Coolant Control Valve. I'm on the Facebook CX-5 page and I see that many people have had this issue. One person had the same problem twice on the same car. I would like very much to have the correct the federal safety agency link to report this problem so that others may report it as well. In my case check engine light came on far from home. A local dealer said it would be safe to drive home which I did (about 180 miles). But a problem that occurs many times on a given car model perhaps should be a recall. The only charge was about $75 from the garage who read the code and diagnosed the problem. It was covered under warranty so there was no further charge to me.

Filed Feb 7, 2024 · Engine · MA

I had driven about 10 miles when the Check Engine light came on when I was far from home. Not blinking. It was not on when I first turned the car on. No symptoms other than check engine light. Got to a garage who got a code p0126 that is covered under TSB 01-005/23 coolant control valve. Called dealer who said it would be safe to drive home 180 miles. I did that. Awaiting appointment tomorrow to get it fixed. I belong to a Mazda Facebook group where lots of others are reporting this same problem - some for a second time!

Filed Aug 17, 2023 · Engine · 19,000 miles · NE

The contact owns a 2021 Mazda CX-5. The contact stated that while driving at an undisclosed speed, the oil light illuminated. The contact stated he stopped at a local gas station and purchased a quart of oil and topped off the oil level. The vehicle was driven to the dealer. The contact stated that after servicing the vehicle, the dealer informed him that the manufacturer had denied the repair because the check engine light was not illuminated. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 19,000.

Filed Jun 23, 2023 · Engine · CA

My car have barely 10k miles and every 3k miles the oil engine light turn on. I thought was a leak but there is no leak or spilled oil anywhere. I find out that lots of 2021 mazda engine have the same issue and that BURN oil for a valve fail that Mazda still didnt recall. To confirm i had a mechanic check for it and they state that engine is burning oil and is not supposed to, expecially because the car barely have 10k miles in almost 3 years driving and that many other customers with same year and vehicle have the same issue .

Filed Mar 8, 2023 · Engine · CO

The engine low oil light comes on every ~3000 miles when Mazda recommends an oil change at every 7,500 miles. For some reason this engine eats oil and has consistently reproduced the check engine light every 3k miles. Mazda hasn't issued an official recall but has published a technical service bulletin.

Filed Feb 25, 2023 · Brakes, Engine · NY

The car is consuming excessive engine oil. Between 3000-4000 miles the low engine oil light comes on. I was on the highway and had to pull over. I was told we don’t need oil change until 5000 miles. Not feeling safe to drive long distance. Dealership acknowledged seal is causing the leaks, but said Mazda won’t cover the cost unless check engine light is on. Also the break pads are moving slightly when breaking, dealership said it’s normal due to break pads are moving back and forth when breaking. However, I can hear the breaks clicking.

Filed Dec 26, 2022 · Engine · CA

Engine is either burning or leaking oil. The low oil light flashed after a 2hr highway trip (traveling to my parent's house for Christmas with my wife), low oil was confirmed the following day via dipstick. Oil was changed at the dealership about 4 months ago, mileage is under 24k miles. Looks to be related to this service bulletin, which still does not appear to have a fix or recall associated with it. Mazda Oil Consumption TSB Turbo Engines Components: ENGINE AND ENGINE COOLING, TIRES, ELECTRICAL SYSTEM the federal safety agency ID Number: 10202685 Manufacturer Communication Number: 01-012-21-3832 5 Affected Products Vehicles MAKE MODEL YEAR MAZDA CX-30 2021 MAZDA CX-5 2021 MAZDA CX-9 2021 MAZDA MAZDA3 2021 MAZDA MAZDA6 2021 Summary Some vehicles may have a LOW ENGINE OIL LEVEL warning message and a CHECK ENGINE light illuminated in the instrument cluster, along with DTC P250F:00 stored in memory. DTC P250F:00 - Engine oil level signal: engine oil level low. Upon inspecting the engine oil level, the level is found to be low and there doesn't appear to be any trace of oil leakage in the engine compartment. This concern usually occurs when the mileage reaches approximately 3,100 - 4,700 miles (5,000 - 7,500km) and may also occur again after replacing or topping off the engine oil. The root cause of this concern has not been identified yet, therefore a repair procedure will be announced at a later date. Since this issue has been reported after a valve stem seal modification, it is very likely that valve stem seal damage is causing oil to leak into the combustion chamber.

Filed Oct 11, 2022 · Engine, Fuel system · NY

I am having 2021 cx5 signature turbo 3400 mile and the engine light can me on upon checking the oil level was to low mark burnt out . I am concern that Mazda have not came up. With a recall yet.