I own a 2026 Mazda CX-5 (Premium Plus) experiencing critical, cascading safety defects involving the vehicle's telematics and driver-assistance systems. I have video evidence of the defect. Unintended Acceleration / Adaptive Cruise Control Failure: While using the Mazda Radar Cruise Control (MRCC) with Stop & Go in traffic, the system silently drops tracking of the lead vehicle (the cluster icon shifts from active green to white without warning or audio alert). Failing to recognize that traffic ahead is still stationary, the vehicle commands unexpected acceleration toward stopped cars, creating an immediate collision hazard requiring manual braking. Inoperative Emergency SOS System: The vehicle's in-cabin SOS Emergency Call (eCall) button is completely inoperative and malfunctioning due to internal telematics communication failures, disabling critical emergency response capabilities. These concurrent failures of active safety controls and emergency communication systems present a severe risk to public safety. The vehicle has already undergone multiple software updates and repair visits with no resolution.
Mazda CX-5 sudden acceleration problems
54 of the 2,483 owner complaints about the Mazda CX-5 describe sudden unintended acceleration, most of them for the 2016 model year.
- owner complaints
- 54
- worst model year
- 2016
- typical mileage
- 10,848
By model year
Often reported together
No deployment 5Jerking 4Check engine light 3Adaptive cruise 3Warning lights 1Hesitation 1Headlights 1
What owners say
When coasting into a parking space the car suddenly accelerated. At a high rate of speed, the car jumped the curb and planting area of median separating the parking area. The car struck 2 other cars on the other side of the median. The car directly in front of my car was moved several feet. My air bag deployed.
2021 Mazda CX-5 2.5L non-turbo. While driving at approximately 8 mph, I removed my foot from the accelerator, but the vehicle unexpectedly accelerated on its own. I did not press the accelerator pedal. I had to apply the brake to slow the vehicle down. This issue has occurred three separate times, on August 25, September 4, and September 18, 2026, at approximately 70,060 miles. The same unintended acceleration behavior occurred during all three incidents.
Twice while making left turns from a stop into faster cross traffic, the accelerator was pressed but the vehicle barely moved (coasting) for roughly 2 - 3 seconds, then suddenly accelerated normally, creating a near-collision risk as cross traffic quickly approached. No warning lights were observed on the dash.
Unintended acceleration incident. I entered the parking lot of a business where the Salvation Army is located to drop off a donation. The parking spaces were on the left side. As I pulled into a parking space and was in the process of parking, the vehicle suddenly lurched/accelerated forward unexpectedly and struck the concrete wall of the building. The airbags did not deploy despite the frontal impact. No one was seriously injured, but my husband, daughter, and I experienced soreness the following day from the impact. Thankfully, I had chosen a parking space in front of a concrete wall rather than the glass storefront windows, which could have resulted in far more serious injuries or damage. I contacted my insurance company, and the vehicle has since been repaired.
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.
Sudden acceleration even. Date April 10, 2026, at around 2:30 PM on a clear sunny day. Car make and model Mazda CX5 bought on 7/4/2023 VIN [XXX] , mileage around 10,000, only one owner. While attempting to park at BJ’s Wholesale Club ,when driver started to make a turn to a parking space, vehicle suddenly accelerated, applying the brakes stopped the forward motion, then driver put the car in reverse to try to properly park in a parking space and the car accelerated in reverse, this sudden motion could have killed or seriously injured any person passing in back of the car, when that motion stopped driver put the car in drive to be able to finally park the car and it sped uncontrollably, brakes didn’t stop the vehicle and it crashed against two vehicles parked nearby, damage to the Mazda vehicle was mainly to the left side, the front grill was not damage because driver was not able to control the rapid forward motion. Mazda dealer wanted the body of car repaired before checking the safety issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The vehicle exhibits unintended acceleration behavior when the brake pedal is applied. Instead of slowing down, the engine revs and the vehicle does not decelerate as expected. On March 16, 2026, while merging onto a highway and applying the brakes, the engine suddenly revved to approximately 3,500 RPMs while the vehicle failed to slow down. There have been previous issues with the vehicle not slowing when breaks are being applied, nut this is the first instance when it was noticed that the RPMs increased while breaking. This issue has also been reported to the dealership, with service documentation noting that when applying the brakes, the engine revs and the vehicle does not slow or accelerate properly. This creates a dangerous condition where braking input does not result in expected deceleration and may instead cause acceleration-related behavior. The issue has not been resolved. This issue significantly increases the risk of collision and loss of vehicle control.
The contact owns a 2024 Mazda CX-5. The contact stated that while his wife was entering the garage, at an undisclosed speed, the vehicle suddenly accelerated; the brake pedal was applied but failed to respond, and it crashed into the refrigerator. The contact was concerned that the failure could have occurred while children were at play. No warning lights illuminated. There were no reported injuries, airbag deployments, fires, or police reports filed. There was a tire imprint on the garage floor. The contact called the local dealer, who scheduled an appointment. The vehicle was not diagnosed or repaired. The manufacturer was contacted, who opened a case and confirmed there was no recall coverage. The failure mileage was approximately 10,000.
During snowfall, the front camera becomes obstructed, leading to a malfunction in the smart brake system. When this occurs, an alert appears indicating a “Smart Brake Failure,” accompanied by an audible warning and the illumination of the check engine light. The vehicle then exhibits unpredictable behavior, including unintended braking and sudden acceleration, creating a hazardous driving situation. The only temporary resolution is to restart the vehicle; however, the check engine light remains on for several days before eventually turning off. This issue occurred while I was driving on the highway on February 19, 2025, posing a significant safety risk. This is not the first time the car has done this.
Related recalls
No recalls on record for this model year.
Questions about the Mazda CX-5 sudden acceleration
Which Mazda CX-5 years have sudden unintended acceleration problems?
The model years with the most reports are 2016 (13 complaints), 2013 (7 complaints) and 2018 (7 complaints).
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