That's the larger heat sink, later style FSR that's been being used in place of the more troublesome earlier version - used in the E39s and X5s. Seems they need to do some more R&D on these!...Also, the old FSU I pulled out had a part number, which realoem.com doesn't find, and when I do a Google search, it references an E39 FSU. Wonder what that is all about. (64118383835) Valeo part.
This is the exact problem I'm currently having except that my blower motor will kick-on after about 5 minutes. Looks like I'll be ordering the FSR unit today.Thanks for your help everyone. My fan had stopped intermittently a few times in the prior year then just went out. I was afraid it was the blower motor as I did not have any erratic behavior. Figured I could spend $80 to get it diagnosed or replace this part for $65 and if it didn't fix it I knew what the other possibility was (lots of money or a quite a bit of money and a lot of work). I got a quote for $900 to replace the blower.... Luckily I popped in a new part from Pelican (Behr brand) in my 01 and the fan works again!
It took a little work to get the FSU to be held in place by the tab. I took a flat head screwdriver and gently pushed the tab back while pushing the FSU that last few milimeters into place.I just changed my FSU on my 2000 323. The instructions helped me A LOT!! My question now is... I got all the screws back in but I could not get the plastic tab to hook back on to the new FSU. Its almost like it would not go all the way in. Anyone else had this issue??