At approximately 2,900 miles, during the first oil change/service, the factory-installed spin-on oil filter could not be removed normally. The oil filter required approximately one hour of removal effort and would not spin off in a normal manner. When the filter was finally removed, the oil filter threaded adapter/union came out of the engine-side oil filter housing while still seized inside the oil filter. The adapter threads showed visible damage, including flattened, galled, and torn thread areas. The oil filter was seized tightly enough to the adapter that the oil filter had to be cut away from the adapter to separate the parts. The adapter was removed from the filter without adding further damage. The damaged adapter threads were cleaned/chased only as a temporary repair because the vehicle was needed for work and parts were not immediately available over the weekend. A new correct replacement oil filter was test-fitted to the adapter. It threaded fully onto the adapter by hand but had slight binding in the previously damaged thread area. The filter was installed, the engine was started, and the assembly was checked for leaks. No leak was observed during the temporary service check. However, the adapter remains damaged and should be replaced. This appears to be a manufacturing, assembly, or original filter installation issue, because the vehicle had only approximately 2,900 miles and the factory-installed oil filter was seized to the oil filter threaded union. The filter should not be seized to the adapter at this mileage, and the threaded adapter should not be pulled out of the engine-side housing during normal oil filter removal. The concern is that a damaged or improperly threaded oil filter adapter could cause oil filter sealing failure, oil leakage, loss of engine oil pressure, engine damage, or an oil leak onto the roadway. The damaged threaded oil filter adapter/union should be documented as a factory/dealer assembly defect.

I am reporting a severe safety defect on a brand-new Mazda CX-50 Turbo Premium Plus involving a complete failure and malfunction of the Advanced Driver Assistance Systems (ADAS), specifically the proximity, forward collision, parking collision, and automatic emergency braking sensors. The safety sensors continuously malfunction, creating an immediate and erratic hazard while driving. The chief concern is the risk of uncommanded, sudden automatic emergency braking at highway speeds, or the complete failure of critical safety warning systems during a real collision event.Upon identifying this safety risk, I contacted an authorized Mazda dealer to arrange an emergency repair. The dealership explicitly promised a loaner vehicle so they could hold my car safely for diagnostic testing. However, when I arrived, the dealership reneged on the loaner vehicle and refused to check the car into service.Instead, dealership sales and service personnel drove my vehicle into the service bay and instructed me to get inside the cabin. A staff member then entered the vehicle settings menu and manually muted the auditory safety alerts to conceal the active sensor malfunction warnings. I immediately protested, stating that muting a critical ADAS safety warning system was unsafe, did not diagnose or repair the defect, and put my life and public safety at risk. Despite my clear objections, the dealership's management instructed me that I must continue to drive the vehicle with the disabled/muted safety systems anyway and to bring it back if anything else happens.When I refused to accept this hazardous vehicle modification and sought alternative resolution, the dealership owner issued a written communication banning me from the property, entirely refusing to honor the manufacturer's warranty or perform mandatory safety repairs. The vehicle remains unrepaired and unsafe to operate on public roads due to random sensor failures, and the primary local dealer has outright refused service.

Gradually increasing knocking and clicking sounds from front end suspension through first 400 miles of new car miles was observed. Researched this issue and found known recall for this specific problem for same model/year but VIN was not identified within the known range. Reported to dealer/mazda service center and told to bring vehicle in for inspection with reported confidence that this is the same known problem.

I was pulling into a parking spot and the emergency braking system applied the brakes very forcefully as if a collision was imminent. I backed up and saw nothing in the parking spot and then proceeded to pull back into the same spot with no issue. There was a loud and rhythmic thumping sound that I perceived as the abs system engaging. This is a rental car so I am returning it to the company, National rental car, and swapping out for a new vehicle. I contacted Mazda about this and was given a case # 00434431.

We are having concerning issue with Mazda CX 50, 2026 hybrid. not going into reverse gear or stopping unexpectedly after attempting to shift to reverse. We recently took the vehicle to the Mazda dealership where we bought it.: Luther Mazda in [XXX]. After repeated attempts, they said they had no way to address the problem since they couldn’t re-create it. We reiterated that it just happened several times to us, but we cannot re-create it on demand. I sent the dealership the following information from the Internet, that was posted about the 2025 model having the same issue as our new 2026 is having. Factory Transmission Software Mode     •    Recall Numbers: NHTSA ID 25V487000 (approx.) early production CX-50 Hybrid units were shipped to dealerships with their software accidentally locked in a specialized "factory testing mode". [1 ([XXX])]     •    Safety Impact: When trapped in this mode, a driver can shift the vehicle directly into Drive or Reverse without depressing the brake pedal, which violates federal safety standards and poses a roll-away or sudden acceleration risk. [     •    The Remedy: Dealers must replace the Engine Control Module (ECM), reprogram the Power Control Unit (PCU) and Hybrid Control Unit (HCU), and use a proprietary diagnostic tool to formally deactivate the factory mode at no cost. [1 ([XXX])] We sent our dealer list, but they still say they cannot do anything for now to resolve the situation with our 2026 model. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)