I replaced mine a couple months ago and it was by far one of the easiest parts to replace I've done. I think you need about 6 rivets and you're good to go. There are how to's all over you tube. Basically you remove the rear drivers side flare, wheel liner and you'll see the pump in the upper rear left corner. The rest is self explanatory. Get the Bosch part off amazon it's the EXACT same part as the genuine OE BMW part. Trust me when I say if I can do it anyone can! I mean that in the most literal sense!