If your car is a 2001, it's not prewired for the bluetooth system... I'm not entirely sure what you would need to install it properly, but probably the OEM wiring harness. Perhaps someone who did a retrofit into a pre-2003 car can chime in.
| 2011 328i xDrive |
Titanium Silver [B]|
Past: | 2004 330xi | Titanium Silver