Honda is trying to establish if a man who crashed his Acura sedan in a California parking lot in 2013 died due to a faulty air bag.

Bloomberg News said the man, Hai Ming Xu, was manouevring his 2002 Acura TL into a parking spot when he accelerated and crashed into a wall. He died after a piece of metal, which blew out as the airbag was deployed, struck him.

The death report said: "The airbag had a metallic portion that hit the deceased on the face as it deployed. The strength of the impact was high enough as to produce a sudden, strong movement of the brain inside the skull which produced the bleeding."

Honda has recalled 6m vehicles in nine campaigns since 2008 over concerns airbag inflators could fracture and fling metal fragments into the vehicle interior.