NHTSA complaint #11690802

Owner complaint summary

1.What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle exhibits trembling while idling and previously showed erratic behavior during hard stops. Possible issue with the engine control software or powertrain system. The vehicle is available for inspection upon request. 2.How was your safety or the safety of others put at risk? The trembling at idle and inconsistent braking behavior compromise vehicle stability and driver control, especially in heavy traffic or emergency situations. These symptoms raise serious concerns about a potential underlying defect. Mazda has issued recent software-related recalls involving loss of drive power—though not for my model—which heightens my fear that similar risks may exist. I should not have to wait for a catastrophic failure or breakdown to validate my safety concerns. By then, it may be too late. I do not feel safe driving the vehicle. 3.Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. Mastria Mazda in Raynham, MA acknowledged the issue and performed a software update. While braking behavior improved slightly, the trembling at idle and other concerns persist. 4.Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No formal inspection has been conducted. I mailed a detailed letter to Mazda’s corporate office in Hiroshima in July 2025 and received confirmation of receipt, but no response or inspection followed. I also mailed a letter to Quirk Mazda, the dealership where I purchased the vehicle, and received no reply. When I attempted to discuss the issue the service manager at Quirk Mazda dismissed my concerns and stated it would be “impossible to recreate” the issue. No one from Mazda or its representatives has contacted me to inspect or address the problem. 5. No warning lamps or dashboard messages appeared. The trembling and braking issues began shortly after purchase.