This is stalking.
If you rephrased your post to say my daughters boyfriend/ ex- boyfriend insists on tracking her movements, it would be.
If it was another individual other than her father she could legitmately complain to the police imo.
Is the car registered in her name?
If it's not , get it transferred so this threat from your husband is no longer a valid one. It's either hers or it's not.
And tell her to turn the tracking service off completly or leave her phone in the mailbox, and just deal with the week of moaning etc. Refuse to engage - both you and your daughter - call his bluff.
Or get her a pre-paid to use, and leave the phone with the tracking option in her room.
People have the right to privacy and what he is doing is likely to breach a number of laws.
All location services should be switched off on phones, especially in social media apps due to the security risks they involve.
I am sure he is just a worried father but he needs to be made to understand that if he continues carrying on in this fashion, it will permanently damage her relationship with you both.
I say this as when I was a teen, thankfully before the days of mobile phones, my father would call the police if I was 5 minutes past my curfew.He would also insist that he was a joint account holder on my bank account ( otherwise he wouldn't let me work) so he could check what I was spending my money on. It taught me to be sneaky, lie about what I was doing and hide as much as I could about my life.
He needs to let go, or he will have nothing to hold onto.