Safety regulators are investigating side airbags made by BMW after reports of 41 injuries (‘mostly cuts and bruises’) from side airbags deploying without a crash, a problem BMW has tried to address in two recalls.

The National Highway Traffic Safety Administration (NHTSA) said its investigation covers BMW 3-Series vehicles built between April 1999 and April 2001. It said its records and others from BMW show 265 complaints of side airbags that could go off if the vehicles were driven over potholes, curbs or other objects. BMW also reported 212 warranty claims for side air bags.

The NHTSA investigation was opened July 15. Last month BMW recalled 20,500 3-Series cars covered by the investigation to reprogram side airbag controllers.