I recently ordered a refurbished Dell E1505, and I was bummed out that it didn’t come with Bluetooth. But it turns out that even if it didn’t have Bluetooth in its Build-To-Order configuration, you can add it after the fact. I posted a photo set that shows you how to do it. I’m pretty impressed with how easy Dell made this: no tools required (the module is compatible with other models, so check the service manual if you’ve got a different Dell).
Add Bluetooth to a Dell Notebook