Open Settings on your iPhone
Tap General
Tap CarPlay
Select your car
Tap Forget This Car
Confirm by tapping Forget
To disable CarPlay in Screen Time, open Settings
Tap Screen Time
Tap Content & Privacy Restrictions
Tap Allowed Apps
Turn off CarPlay if available
To stop CarPlay from connecting automatically, go to Settings
Tap Bluetooth
Turn off Bluetooth
Or go to Settings
Tap Wi-Fi
Turn off Wi-Fi if needed
To disable CarPlay access in your car, check the car’s infotainment settings
Turn off Apple CarPlay in the vehicle settings if available