Mazda just recalled 161,400 defective cars in the US because loose screws can cause the side doors to come open while the car is being driven. All Mazda6 produced during 2009 to 2013 at a plant in Flat Rock Michigan are affected. Mazda will apply a thread-locking adhesive to the screws and re-tighten them free of charge. The recall is expected to begin by October 18