I should chime in here since I did all the research about this already since the AAFES site wouldn't let me choose bluetooth (or personalized plate... same as Canada, from what I've read)... but it was about $100 cheaper plus free shipping that way.
Anyway... I found teardown pics of the M11x WITH bluetooth close up (sorry, found it on my old laptop and can't find it again!). Cross referenced those numbers in Google and came up with Dell 365 (RM948) bluetooth module, shared with the following systems:
Alienware Area - 51
Alienware Area - 51 ALX
Alienware Aurora
Alienware M11x
Inspiron 11z
Inspiron 14 (1440)
Inspiron 14 (1464)
Inspiron 14z
Inspiron 15 (1564)
Inspiron 15z
Inspiron 17 (1764)
Latitude 13
Latitude E4200
Latitude E4300
Latitude Z
Precision M6500
Studio 1458
Studio 1745
Studio 1747
Studio 1749
Studio XPS 8000
Studio XPS 8100
Vostro 3300
Vostro 3400
Vostro 3500
Vostro 3700
Vostro V13
http://accessories.us.dell.com/sna/p...chassisid=8981
Refurb $10 + shipping
Don't trust the other Dell parts page showing "365" in the heading, the systems above in the compatibility, and narrow card pic but says 370 everywhere else (not to mention a different part number) in the description...
To me, it seems the pages got mashed together somehow... search Google for Dell 370 and you'll see it's a wide card with an edge connector, where as the 365 is a narrow module with a connector on the bottom that screws on the board...
I've read that the 365 module is not available new, only refurbished, even if you call them and try to order it for your M11x...
Here's the service manual page showing the narrow bluetooth module on the top of the motherboard under the palm rest and just about a PITA to get to:
http://support.dell.com/support/edoc....htm#wp1213253