Originally Posted by Efthreeoh
Okay, don't ask me how I found it, but I'm pretty sure this is the part. Item 14 (circled in the diagram below):
14 Cover D = 38MM 1 05/2006 51717169481 $3.05
Good fine regarding part number. Oemreal.com prices are way behind the times of current cost. For most parts and current cost, cross reference with BMW of Atlanta's website. Now it's a whooping $3.75. They probably will charge you $15 for shipping though.