First time poster, long time member. My '04 530i has sport seats that are KILLING my Sciatic nerve. I can't sit in the car for more then 10 minutes before I feel it, but I love the car otherwise. My hope is to replace the driver's seat with an OEM "comfort seat" but I need more information for my search. Any help would be greatly appreciated. For example: What seat will fit (model years, options, etc.)? Other than the seat itself, what else needs to be replaced (wiring, etc.)? How big a job is this? Where should I search for the parts? Is this a needle-in-a-haystack kind of process? Anyone else have this problem or done this before? I've started the search but realized quickly that there are lots of variables, some of which I have yet to even think of. Thanks in advance for any help that's out there.