Go to one of the online part databases and look up the 11 digit BMW part nbr. Once you have the 11 digit BMW part nbr...open a google (or your fav search engine) and type
"BMW xx xx x xxx xxx" into the search box and hit enter.
If it is NOT a rare item...you should get a list of results of vendors that are selling that part. Obviously if they have an online presence...there will be a price listed and you can figure out from there what you want to do.
There's also a website that will search multiple online vendors and give you a comparative price list:
Furiousmethod.com - BMW Parts Price Comparison
If you haven't already...feel free to save the online part database sites below to your favorites/bookmarks for future reference. They all are a valuable source for more than just part nbrs. The diagrams help with deconstruction/reconstruction if you need to pull something apart, you can see where all the hardware is that secures an item (and the amount in the QTY column)...you can see what other (if any) BMW models use the same part, etc :
- RealOEM.com - Select Your BMW Model
- BMW Parts Catalog
- www.etkbmw.com (this site also has a VIN decoder tab)
Assuming you need #6 in the diagram below (the database lists 23 in the QTY column)...again, type BMW and the part nbr into a google search box. You may even want to check with your local BMW dealership's parts department...sometimes they can be competitive (depending on your area and number of dealerships)...it may be less expensive ordering from them and paying local taxex...versus ordering online and paying for shipping and handling: