Hello again Crystal and thank you for your reply. However, the names as they actually appear on the title (other than the promissory note holder) is what determines who has the right of possession
of the vehicle. Possession does depend on who is paying for the vehicle or insurance, or who is first on the list, but only on the title itself.
If you were the only person on the title, then yes, of course you could go get the vehicle as long as you don't breach the peace. In other words, you need to take it without violence. However, if you and this other person are both on the actual title to the vehicle, then you both have 100% right to possession. So, you could still take the vehicle if your name and his are on the title, however, he could take it back. In other words, the police could not help you take the vehicle since he would have the same legal title to it as you do.
If you have broken up though and you want to get out from underneath this joint debt and liability, then you can tell him that he needs to either turn the car over to you, get it refinanced in his name only, or that you will sell the vehicle. If the title is title XXX or
YYY, then either of you could sell it without the permission of the other. On the other hand, if it says XXX and
YYY, you need each other's permission and signature to sell OR a court order. So, you may ultimately have to go to court and get the court to order that the vehicle be sold, or you will have to work something out with him.
Please let me know if you need any clarification. I would be glad to assist you further if I can.