I just installed these fender flares. You need a dremel, and you must cut out slots for each tongue on the fender. Then you must fasten each tongue on the inside. You must take off the original flare and rear bumper for the easiest way to install these extensions. Son't rush it because you will be unhappy with the quality. Do not Use Glue...DO NOT I REPEAT. The dealership might carry the locking fasteners for the tongues, if no you can try and melt the tongue over( that what I did) Good Luck

__________________
2001 X5 4.4i WHITE-Loaded like a baby's diaper SOLD