The E46 is a 3 Series BMW vehicle that was produced until 2005. Late models of the E46 feature BMW's onboard computer control system with Bluetooth. Using the Bluetooth feature, you can connect a Bluetooth-enabled cell phone to the onboard computer control system in your E46. You will need to complete an initial pairing process to establish this connection.
Power on your BMW E46. The vehicle will automatically enter pairing mode for approximately two minutes.
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Select the "Bluetooth" option on your phone and set the Bluetooth to the "On" position.
Select the option on your phone to search for new Bluetooth devices.
Select the BMW vehicle from the list of Bluetooth devices displayed on your phone.
Enter the four-digit Bluetooth passkey for your BMW. You can find the passkey listed in your vehicle's documentation.
Wait while your phone completes the Bluetooth pairing process. The phone will prompt once a successful connection has been established with your BMW E46.
After completing the pairing process, the BMW E46 will connect to the paired cell phone automatically.