My order for the BT350 got cancelled (for a second time). So I called back Dell and fortunately got a senior level customer service representative. She researched the issue for well over 40 minutes and gave me the following information which seems to be correct.
What she told me is that legally Dell can NOT sell you part number W9242 (or even part X5166 for that matter). All of these parts are for the same BT350 module ... but part number W9242 and X5166 are the internal replacement
part numbers and are only
supposed to be sent to you by Dell technical support at no cost to you
. If you pay for either of these parts from out of pocket, then Dell has some kind of legal issues.
The only part you can legally buy, is part number "430-1188 (Int Dell Wirless 350 Bluetooth for Inspiron 9300)". Unfortunately only sales dept can sale you this (NOT spare parts dept) and it costs $49.
Hope this clarifies the issue for you all. Now I know some of you will say right away that "I purchased part X5166 (or W9242) and got it fine" ... and I don't disbelieve you, but according to the senior CSR that I spoke to (and she sounded like she knew what she was talking about) those sales are illegal and you were luckly to be able to get those under the radar.
This is the reason all these ordered are getting cancelled left and right, and in case you are waiting for the item to get back in stock and are hoping that it will actually ship ... I won't hold my breath if I were you.
Lucky for me that the CSR I spoke to was considerate enough for all my trouble, and placed an order for me for the "correct" part number (430-1188) free of charge, and I FINALLY got it after two days