1. To connect your device to a 2007 BMW X3 via Bluetooth, you will need to have the Bluetooth feature enabled on both devices.
2. Once Bluetooth is enabled, you will need to find the name of the BMW X3 in your device's Bluetooth settings.
3. After locating the name of the BMW X3, select it and pair the devices.
4. Once the devices are paired, you can use the BMW X3 to make calls, listen to music, and more, using your connected device.