Michael Brooks, acting executive director at the Center for Auto Safety, a Washington-based advocacy group, says other automakers could be at risk of a similar situation if Takata parts were used to restore deployed airbags. He urged the National Highway Traffic Safety Administration to investigate. "NHTSA should request information from all manufacturers that have Petri airbags, at a minimum," Brooks said. "If the Takata airbags have been replacing Petri airbags, they have to figure out the entire population of affected vehicles and have them inspected and replaced if necessary." The affected BMWs were manufactured earlier than the ones already under recall for defective airbags, and brings the total to 1,568,247, Kiehne said. Some of the vehicles were previously under recall for passenger-side Takata inflators, she said. The newly affected vehicles include certain 2001-2002 X5 SUVs, 2000-2002 3 Series and 2001-2003 5 Series models.