It is for a 323, but it will work for any E46 likely. There is no part number because BMW does not sell it individually. It is the part that you have to loosen to remove the positive battery cable and also tighten to secure it.
Feel free to call or text me at 903-363-6697 to discuss it further.
Last edited by Blueandwhite85; 12-28-2012 at 12:51 PM.