On your iPhone, open Settings
Tap General
Tap CarPlay
Select your car
Tap Forget This Car
On your iPhone, turn off Bluetooth
On your iPhone, turn off Wi-Fi
In your car’s infotainment system, open the CarPlay or phone settings
Remove or disconnect your iPhone
Turn off CarPlay if the option is available
Unplug the iPhone from the USB cable if using wired CarPlay
Restart the iPhone if CarPlay reconnects automatically