Mazda seat heater lawsuit in the US: owners allege burn and fire risks
Mazda faces another class action lawsuit in the United States after five vehicle owners claimed that seat heaters in several models can become hot enough to cause burns, smoke and property damage. According to the lawsuit, the alleged defect may affect about 301,549 vehicles, with potential repair costs estimated at more than 662 million dollars, about €610 million.
The case was filed in the US District Court for the Southern District of California. The complaint names the Mazda CX 9, Mazda6, CX 30, CX 50 and CX 5. More specifically, reports point to the 2016 and 2017 CX 9, the 2018 Mazda6, the 2024 CX 30, the 2023 CX 50 and the 2023 CX 5.
The plaintiffs allege that Mazda sold vehicles fitted with seat heaters that can overheat during normal use. According to the complaint, the risk goes beyond discomfort. Owners describe burns, smoke, damaged upholstery and scorched clothing.
Owners report everything from burns to smoke
One of the plaintiffs, Micah Prochaska from Illinois, claims that the passenger seat heater in his 2017 Mazda CX 9 became so hot that it damaged a jacket left on the seat and burned a hole in the upholstery. In the same incident, he also reported smoke coming from the seat.
California plaintiff Sharmee Anderson alleges that the seat heater in her 2023 Mazda CX 5 caused a blister on her leg, treated as a second degree partial thickness burn. Another California plaintiff, Patrick Sandoval, links the seat heater in his 2018 Mazda6 to burns on his legs and buttocks, and claims the heat aggravated an earlier back injury.
According to the complaint, Sandoval later bought a 2023 Mazda CX 50, believing the problem was limited to his previous car. He then found the seat heater in the newer vehicle too hot as well.
Minnesota owner Russell Quinn claims that smoke began rising from the passenger seat of his 2016 CX 9. He says a dealer charged him 650 dollars, about €600, to mechanically disable the seat heater.
662 million dollars is not a court ruling
One point matters here: the 662 million dollar figure is not a judgment or settlement. According to MotorBiscuit, it is the plaintiffs’ “reasonable estimate” of what a repair campaign could cost if about 301,549 vehicles needed fixing. That would work out at roughly 2200 dollars, about €2030, per car.
Mazda faces a possible reputation and resale value problem
The plaintiffs allege that Mazda knew about the seat heater issue but failed to warn buyers properly. They also argue that the alleged safety risk reduces the value of the vehicles, because buyers, in their view, paid more than the cars were worth with the defect present.
For Mazda, the immediate legal question is only part of the story. In a market where trust, safety and residual values matter almost as much as engineering, a hot seat can become a cold commercial problem surprisingly quickly.
