Mazda CX-5 2023

After driving a few mile, the following two warnings come up * Smart Brake System Malfunction * Forward Radar Sensor System malfunction. If I turn off the car and then restart, the warnings go away. However, it comes back if I drive for a while again. I have visited dealership a few times for the same issue, they replaced the wheel bearing and brake switch. The warning disappeared for days and came back.

Engine light came on. Immediately brought to dealer. Always serviced at dealership. One previous occurance of illuminated light reading major engine malfunction. Pulled car to side of road, called dealership who advised turn off and back on. Didn't tell me about ALL the problems that Mazda was aware of. Now I'm told my new car with 22k miles has a blown engine. No notification from Mazda about a known problem. Asked when buying the car if there were any major problems with this car. Mazda apparently lies.

New 2023 Mazda CX5. We have experienced 2 Unintended Sudden Acceleration episodes. The most recent one was while backing down our driveway, the car suddenly accelerated when the brake was applied causing considerable damage to the car and house. Our front porch camera caught the entire episode showing that the brake lights were in fact on. Mazda needs to take responsibility and recall these vehicles to find out what is going on, as there are numerous other similar complaints for this car on this site and others.

When driving the vehicle, my car exhibits a rocking / shake when going from brake to gas at speeds below 20 mph. I was told by the dealership that it is normal operation, but when driving two other CX5’s, the behavior did not exhibit. I do not know what to do. I have also brought it to 2 independent mechanics and they told me the engine mounts needed to be replaced. I did the service at 36,000 miles and it did not get rid of the problem. It seems to be a defect of the car, which I’ve been living with since 2023. The issue has been ongoing.

The passenger seat occupancy sensor goes off intermittently, causing an extremely distracting seatbelt alarm in the vehicle during operation. This has occurred to me while driving on a highway; I deeply lost focus on controlling the vehicle as the alarm started suddenly, I shoved the one water bottle off the seat to no avail, and I had to reach way over to plug the seatbelt in to silence it. In other instances where this occurs, only a full restart of the vehicle will reset the sensor. Existing TSB 08-001/23 was deemed to not cover my vehicle by the manufacturer, despite my VIN being in range and symptoms being identical.

The contact owns a 2023 Mazda CX-5. The contact stated while the vehicle was parked, she entered the vehicle and noticed that the sunroof glass had exploded. The contact stated that she inspected the vehicle but could not determine the cause of the failure. The contact stated that the shade guard was closed at the time of the failure. The vehicle was taken to the dealer, where the contact was informed that the vehicle could not be serviced because a rock had probably struck the sunroof. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The contact was awaiting an email from the manufacturer. The failure mileage was approximately 16,127.

I am reporting a safety defect in my 2023 Mazda CX-5 involving the right headlight assembly. The internal LED cooling fan has failed, causing loud noise and excessive vibration. This is a confirmed manufacturing defect (documented in Mazda Service Alert SA-013-23). Safety Risk: The cooling fan is essential to prevent the LED from overheating. A failure of this component can cause the headlight to dim or shut off completely without warning while driving at night, creating a severe visibility hazard and increasing the risk of a crash. Repair Details: An authorized Mazda dealer confirmed the internal failure and verified no external damage. Despite being a 2023 vehicle and a known safety issue, Mazda North American Operations has refused to cover the repair.

When the vehicle light position is on Off at night the daytime running lights on the front of the vehicle come on which appear to be the same as the normal headlights, but the back lights are completely out. The brake lights work, but the back tail lights and licence plate light are out. The car's light switch is on the turn signal arm and can be moved inadvertently when using the turn signal. At this point you assume you have all around vehicle lights because the front headlights are on which are really the Day TIme Running Lights (DTRL). The DTRL are as bright as the normal headlights at night. This gives you the false impression that all of the outside vehicle lights are on. When this happens you are driving with no back vehicle lights which is a major saftey issue.

Slowly and cautiously entered parking lot of a small strip mall. Proceeded to a parking space located in between two parked vehicles.Maneuvering into parking space I removed foot from gas pedal toward the break pedal; before foot made contact with break pedal the vehicle accelerated on its own surging over the cement parking bumper, over bushes, through the grass, down the curb and into the street. I jammed on the breaks. Lifting foot from break pedal I did not touch the gas pedal in fear the surge might happened again. Instead I allowed the vehicle to coast as I guided vehicle to the curb. In all the commotion, while trying to control vehicle safely I noticed the dashboard transmission indicator lights flash from park to drive to neutral. Safety issues for me and family at risk because we had no control over the acceleration of the vehicle.

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.

The air conditioning compressor clutch suddenly would not engage, leading to reduced visibility out of the windshield during humid weather in Oklahoma springtime and extended times for windshield to defog. Temperatures inside the vehicle also rose to very high levels without air conditioning available, even with windows down while driving. No crash or injuries but this presented an unsafe situation for a vehicle with only 39,000 miles and purchased new from the dealership. There were no indicator lights, messages, or warnings, other than observation that air conditioner vents were no longer blowing cold air when selecting the AC button after problem occurred. Problem was verified by both an independent mechanic and our Mazda dealership. AC system was overcharged from the factory per diagnostic results, leading to internal AC compressor short and early component failure.

The Low Oil Warning Light comes on between oil changes. I think this is the 3-4th time. I will have to add 1 quart of oil to the car after 3000-4000 miles. I only have about 33,000 miles on this vehichle and do the oil changes myself. I checked for leaks at the oil filter and oil drain plug. No indication of oil leaking or I would see it on the floor of my garage. What component or system failed or malfunctioned, and is it available for inspection upon request? Engine using excessive amounts of oil. It could be available for inspection How was your safety or the safety of others put at risk? Has the problem been reproduced or confirmed by a dealer or independent service center? I plan to take it into the dealer for next oil change and report it. 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? The Low Oil warning comes on

At 2:00 on a clear afternoon I was slowly coasting into a right hand turn into a parking space, and lightly tapping the brake to finalize the stop, when the car accelerated HARD forward over a curb and a sidewalk into the brick wall of a building. Airbag was deployed. My injuries were a nasty wrist contusion and bloody gashes where the airbag "door" deployed and I also had complete seatbelt brusing on my throat, chest and across my abdomen. This after traveling a mere 7-8 feet. At the time I was very shaken up and incredulous that such a thing could have happened logically, and conceded that perhaps I had made a mistake somehow. As I settled down later I became dubious, especially when I got behind the wheel of my rental car and 100% when I sat in my actual car at the wrecking yard. I am crystal clear I was depressing just the brake. Even if I had accidentally hit the accelerator instead of the brake (I did not) it would not have accelerated to the degree that it did. I am now scared of my car and am just hoping it is declared totaled by my insurance so I don't have to drive it again - any car but that one.

My 2023 Mazda CX-5 (48,000 miles) is experiencing a loud mechanical whirring/grinding from the driver-side headlight assembly, a documented manufacturing defect involving foreign matter contamination of the internal LED cooling fan bearings (TSB 09-029/25). Despite the manufacturer acknowledging this factory-installed defect, Mazda has refused to proactively remedy the issue because the vehicle is nominally past its 36,000-mile bumper-to-bumper period. I have been explicitly advised by service personnel to continue operating the vehicle until the headlight unit 'entirely fails' before further assistance may be considered. This 'fail-first' directive is a reckless disregard for public safety; the internal cooling fan exists specifically to prevent the high-intensity LED from overheating. A failure of this fan leads directly to the sudden burnout of the main headlamp while the vehicle is in motion. Mazda is essentially requiring me to drive a vehicle with a known, ticking-clock lighting defect and wait for a total loss of visibility at night before they will address a part that was contaminated during their own production process. This is a critical safety hazard that places myself and other drivers at risk of a collision due to sudden headlamp failure.

I began hearing a loud engine noise similar to a lawn mower whenever my headlights would come on which includes just when I unlock my car. When I first took it back to the Mazda dealership for servicing and mentioned this to the service manager he told me it was an issue with the headlights that they’ve been seeing. They returned the car to me and said they did not hear it. Then after my warranty ended it got worse and when I brought it back to the dealership they stated they had never heard of this happening before and said that I brought my car for an air-conditioning issue. When identified that a service manager had told me that this is something they’re saying they then agreed to pay to have the headlight fixed. Initially they told me I was gonna have to pay approximately $1500 out-of-pocket because my warranty had ended to have it replaced. As I proved that I told them about this before the warranty was ended they covered the cost of it and replaced it. Two weeks ago the noise came back. When I look on the Internet and put in the search terms of loud noise when headlights come on is a common complaint. This seems to be a design flaw which is affecting the headlights causing a safety issue. Mazda should address this and issue a recall in my opinion.

What component or system failed or malfunctioned, and is it available for inspection upon request? - Smart Brake Support (SBS) & Forward Obstruction Warning system malfunctioned. Front radar sensor malfunctioned. Parking brake malfunctioned. I-activesense system malfunctioned. Emergency lane keep disabled. Dynamic stability control malfunctioned. Traction control system not operating correctly. Anti-lock brake system (ABS) malfunctioned. Brake system not responding. How was your safety or the safety of others put at risk? In total 10 malfunctions led to brake not responding and could not stop the car and resulted into a car accident. 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? POLICE report from car accident states brake malfunction. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Car was totally fine until all 10 error messages appeared on Jan.17th 2026 12:42-12:43PM and immediately the brake system did not respond and resulted in the car accident. **important** Police report documented that the officer on scene is a witness of the car dashboard shows “brake malfunction”

The contact owns a 2023 Mazda CX-5. The contact stated that while the temperature was 45 degrees or lower, the vehicle failed to start properly, and the engine failed to warm up properly. The coolant light was illuminated, and the engine temperature gauge failed to rise above COLD. The vehicle occasionally failed to start or while started and driving at various speeds, the vehicle stalled while and engine temperature failed to reach the normal operating temperature. The check engine light was illuminated. The contact would shift to SPORT Mode to prevent the cylinder activation from occurring and causing the vehicle to stall. The contact stated that the failure persisted, and the vehicle was hesitating while driving in temperatures of 50 degrees or less. Additionally, the key fob intermittently failed to unlock the vehicle. The contact stated that the vehicle failed to start and had to be towed. The contact stated that during the recent failure, the battery was disconnected, and the vehicle was towed to the dealer to be diagnosed. The contact stated that the key fob battery had been replaced 6 times; however, the failure persisted. The vehicle had not been diagnosed or repaired for the engine failure. The contact called another dealer, J. Allen Mazda (15150 Airport Rd, Gulfport, MS 39503); however, only an appointment to inspect the vehicle was made but the vehicle was not yet inspected. The manufacturer was made aware of the failure and a case was filed. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 4,000.

On October 16, 2025, while slowly pulling into a parking space, my vehicle experienced sudden and unintended acceleration without driver input. I did not depress the accelerator. Despite attempting to stop the vehicle, I was unable to do so. The vehicle mounted the curb, entered the sidewalk area, and struck a community mailbox, a tree, and two legally parked vehicles. My vehicle and the two parked vehicles were declared total losses. At the time of the incident, pedestrians, including toddlers, were present on the sidewalk. This loss of vehicle control created an immediate and severe risk of serious bodily injury or death. Post-incident diagnostics indicated multiple system errors, including but not limited to: •Powertrain Control Module •Anti-lock Brake System (ABS) •Instrument Cluster •Smart Brake Support / Mazda Radar Cruise Control Of particular concern is that Mazda, through its authorized dealer Rosenthal Mazda of Gaithersburg, Maryland, had prior notice of abnormal vehicle behavior. On two separate occasions before the crash, I reported that the vehicle would jolt suddenly, as if struck from behind, and at times felt as though it was attempting to accelerate without input. On each occasion, I was informed that the dealer could not duplicate the issue. No corrective action was taken, and the vehicle was returned to service. This event constitutes a serious safety failure involving unintended acceleration and apparent braking or electronic control system malfunction in this-model vehicle. Given the involvement of advanced driver assistance systems and braking components, this matter warrants immediate and thorough review.

I was driving my new 2023 Mazda CX5 with approximately 1,300 miles in the center lane of a divided highway of the suburbs just north of New York City. I was driving with all windows closed, A/C turned on and the weather was clear, hot and sunny. Without any warning there was a loud and abrupt explosion from within the vehicle. As I looked in my rear view mirror I saw glass blowing in the wind behind me. I suddenly detected wind blowing above my head and realized my sunroof had most likely been the glass I saw behind me. I kept the sunshade closed with one hand until I could safely pull over to look. I did not suspect any road debris to have caused the breaking of the glass and my inspection did not reveal any other damage or possible outside causes. This even appeared to have been spontaneous and without warning. I feel that this incident could have been a lot worse had the sunshade been open, most likely blowing little pieces of glass into my eyes while driving at highway speeds in a center lane. I also fear that this could have been a hazard to my children passengers if they were in the back seat at the time it happened. I notified my Mazda dealership at the earliest possible moment and they asked to inspect it. After inspection, a regional service manager advised that this type of incident has been heard of but only in southern warmer states and typically on hot sunny days when the air conditioning is on inside the vehicle. Apparently the temperature difference coupled with cabin pressure and any sort of defects in the glass can make the glass explode upward. Date/time of incident 6/11/23 @ 5pm est. Date of repair by dealership: 6/15/23

The car has a lot of vibration when driving 60mph and above. Have had this issue looked at more than 5 times and they had my card for 1 month at the dealership trying to find the issue. This started back in February of 2024 and I have purchased 4 sets of tires and nothing makes the vibrations of the seat, steering wheel go away. Originally it wasn’t vibrating while driving back in February of 2025 only when braking to which I said to them I think it’s the rotors that have an issue. They never check the rotors and said it was my tires that were cupped. I put new tires on the car and still the same issue and went back to the dealership in April of 2024 and let them know it think it’s the rotors. In fact it was the rotors they were warped and they balanced the tires again. The dealership recommended resurfacing the rotors to which I had done. A Couple of months later the vibration while driving started. Bought another set of tires had then installed, balanced and aligned and still vibration. I thought maybe it’s the brand so I bought another set of tires to which the problem is still there. Now besides the vibration while driving I have vibrations while braking again after the dealership put in new rotors back in Nov. 2024. When to the dealership on 06.26.25 let them know the vibration while braking is happening again and I think it’s the rotors. They check them and rotors are warped again about only 6.5 months.The service manager said she will resurface them for me for no charge but then the service advisor said if they do that that the resurfacing is going to make me have to change the brake pads as I will end up in the red since my brake pads are in the yellow right now. I said then don’t resurface because I am not paying for the brake pads when that should’ve been done the first time the rotors were warped. I feel like I risk my life everyday driving this car to work 34miles one way.

Summary of Events: Purchase Date: 05/27/2023 Coolant Warning: In January 2025, I received a coolant temperature warning (code P0126) indicating insufficient coolant temperature. Repairs: I brought the vehicle in for repairs on 02/15/2025 for thermostat and related parts. The repairs were completed by 02/17/2025. New Warning: On 03/18/2025, I received a high coolant temperature warning. Upon inspection, coolant was nearly empty, and I found coolant contamination in the engine bay. Notification to Dealership: I emailed Hennessy Mazda on 03/19/2025, but after no response, I filed a claim with Mazda headquarters on 03/20/2025. Only after that, they called me and instructed me to bring the vehicle in. They claimed that after replacing the faulty parts and cleaning the engine bay, the car was ready for pickup. (While they assert that all actions were completed on 03/22, Based on the fact that the car door was opened approximately five times in April, it can be inferred that the necessary actions were likely completed in early April.) Concerns: Coolant Leak: The coolant leak persisted for nearly a month, likely causing damage to internal components due to engine overheating. Electronic Contamination: The leaked coolant likely contaminated sensitive electronic systems, wiring, and connectors, potentially leading to long-term failures due to the conductive and corrosive properties of modern coolants like Mazda FL22. Long-Term Risks: Hidden corrosion inside connectors and wiring. Potential for electrical failure, sensor malfunctions, and further degradation over time. Hennessy Mazda is currently addressing only the visible issues and claiming the car is now functioning properly, while attempting to shift the long-term and hidden risks onto me. I am requesting a vehicle replacement or compensation due to the safety and long-term reliability risks posed by the unresolved coolant leak and contamination.

On 09/01/2026 at approximately 55 mph, I was driving with adaptive cruise control engaged. The vehicle ahead decelerated abruptly. My vehicle began braking hard with no input from me for a fraction of a second. A red BRAKE warning appeared in the instrument cluster with an audible alarm. I then applied the brake pedal hard. On first contact the pedal barely moved from its rest position and was extremely firm. About a second into my application, while still traveling at over 25 mph, pedal resistance dropped sharply and pedal travel increased substantially. I had to push the pedal several inches farther to get back to comparable deceleration. The pedal did not pulse or vibrate. I came to a matching speed roughly one car length from the vehicle ahead, and only because I kept braking hard. I did not see an MRCC Cancelled message, though the BRAKE warning occupies the same part of the display, so I cannot say whether the initial deceleration came from Mazda Radar Cruise Control or Smart Brake Support. No brake, ABS, or DSC warning lamp illuminated before, during, or after the event, and none has since. There were no symptoms beforehand, and the brakes have worked normally since. Failed component: unknown. I cannot determine whether the change in pedal feel came from the brake booster, the DSC hydraulic control unit, the master cylinder, or the driver assistance system handing brake control back to me. The vehicle has not been inspected by anyone and no service center has reproduced the issue. The vehicle is available for inspection if needed. If a driver assistance system is commanding brake pressure and withdraws it during the driver intervention, total deceleration can drop at the moment when the driver still wants to stop aggressively to avoid a crash. Suddenly, the driver has to find the extra pedal travel while still closing on the obstacle. I slowed to a safe speed in time. With less room, or less attentiveness, I may not have been able to.