So I have a 1993 325 IS, completely stock save the ///Mcontours that it rolls on. My Problem. Whenever I corner HARD to the right the car makes an insanely loud "Knock Knock Knock Knock" sound that sounds like it is coming from under the rear passenger floorboard. It sounds like somone is pounding on the floorboard with a hammer. The car only does this when thrown into a corner very hard. It just started doing this last week. I hit the same corner every day when I leave work & slide the ass end around (gonna have to take a picture of this corner..it rocks) & when I hit is last tuesday this knock started. The car has had nothing happen to it such as a wreck or curb jump. If you drive like a normal person instead of trying to do a Schumacher immatation you would not know anything is wrong. I have taken it to the local Bimmer Shop, & they said they could not reproduce the problem (how I have no idea I can make the car do it at will), guess I amgoing to have to take the shop guys for a ride. Anyone else ever have this happen, or know what it might be?