On your iPhone, open Settings
Tap General
Tap CarPlay
Select your car
Tap Forget This Car
Confirm the action
To disconnect temporarily, unplug the USB cable
To disconnect wirelessly, turn off Wi-Fi and Bluetooth on your iPhone
To stop automatic connection, disable CarPlay in your car’s infotainment settings
To disconnect from the car display, open the CarPlay settings in the vehicle and remove your phone
To stop CarPlay from launching, turn off Siri and CarPlay permissions in iPhone settings