You sue whoever looks to be to blame. So perhaps the victim’s family sues the car owner. The car owner then sues the car manufacturer if they feel it was to bla

You sue whoever looks to be to blame. So perhaps the victim’s family sues the car owner. The car owner then sues the car manufacturer if they feel it was to blame. If the company feels an individual engineer was to blame they might sue the engineer. Basically just let the courts figure out the balance between societal harm and responsibility.