Just to be clear...
The "PR Code" 9W7 is a three character code which describes an option your car has. It's not a part number.
To have a 9W7 option requires appropriate wiring, a microphone, applicable control switches, and a properly coded Bluetooth module (and a speaker which is probably always part of the radio). The actual Bluetooth module part number can be one of several part numbers, depending on the car and other components within the vehicle. The "9W7" BT module can change over time as other components upgrade (e.g., the RNS315 now has a BT module inside). Whether one specific BT module has the exact features of another may not always be the case, although basic functionality is likely to be the same because, after all, the "9W7" PR code suggests so.