you'll first have to cut a hole in your bm. this in itself is heart wrenching to do. then you'll have to run a wire to your corner lights. this can be run underneath the fender of your car. i used a clothes hangar to push the wires through. i highly recommend that you use a dremmel tool to cut. do not use anything else!!! nothing can cut cleaner in my opinion. but i just wanted to let you know that it's possible... i used to own a 92 325 that i added side markers too.