Open Settings on your iPhone
Tap General
Tap CarPlay
Select your car
Tap Forget This Car
Go to Settings
Tap Screen Time
Tap Content & Privacy Restrictions
Tap Allowed Apps
Turn off CarPlay
On your car’s infotainment system, open Settings
Find Apple CarPlay settings
Disable CarPlay or Apple CarPlay
Disconnect the iPhone from the USB cable
Turn off Bluetooth on the iPhone if needed
Remove the car from Bluetooth devices if needed