Hi Dan, Watch for rust between the back bumper cover and the rear quarters, they go there from the quarters rubbing against the cover. My friends 88 is totally gone there and my 90 is just starting so it's now in the body shop as we speak!! Also watch the bottom of the doors under the mouldings and under the body side moldings. My body side moldings were ok when they came off but under my door moldings on the very bottom of the doors we all starting to get rusty. Hope this helps!! Colin 90 735il, 207kms!! And Shiney again!!