You can even change the whole stereo head unit to a new one ... it’s one of the cheapest ways to add a Bluetooth ...

Also, the CD changer input for the stereo ... add-on hardware, he built his own circuit board around an ATmega168 microcontroller and Bluegiga WT32 Bluetooth module. To connect to the car ...

A simple Bluetooth module designed for wiring into car audio systems ... However, it requires adding in a Arduino or similar that can speak I2C, a DPDT relay, and some supporting components.

Add Bluetooth to Your Car: UGREEN Bluetooth receiver is designed to turn home or audio systems, or speakers into hands-free, Bluetooth-enabled devices. If you want to ...