Guys I changed my rear pads and rotors over the weekend on my 330i. One issue that backed me up for a bit was the fact that one rotor was hard to come off from the hub since this was the originals. I forgot that the car has to be in N neutral and no ebrake in order to spin rotors and hit them with a hammer. One sucker will not come off till i realized i had to change from P to N neutral. Also, another tip is that if your sensor comes off in a complete piece u dont need to replace it. I did not have to since mine sensor came off really easy and unbroken. This saved me from removing the back panel. Last but not least, make sure you use sand paper to remove all the grim from bracket and greese the edgesthat holds the pads along with pin sliders. I also used CRC quiet. My brakes are like NEW again. Saved myself about $800.00 oh.. man this feels good. Hope this helps..Cheers!