Removing myself from a car title.

Anybody can sue anybody for anything, but I don't see what basis you would have to be removed from the loan (it's the loan that matters, not the title; being removed from title doesn't excuse you from your obligations as co-signer of the loan).  The finance company agree to loan money to buy the car based on your credit.  It never agreed to loan your ex money without your credit, and presumably never promised that you would be relieved of your obligations if you broke up.  You might have a better chance suing your ex, but unless he promised that he would assume sole responsibility for the loan if you ever broke up, I don't see that your claim now is very strong.  Bottom line is that if you are ever required to pay anything because of the auto loan, then you may have a good case against your ex for him to reimburse you (assuming that he has the money with which to do so), but unless someone else of equal financial stature agrees to substitute for you as a co-obligor under the loan, I don't see any reason why the finance company would let you off the hook.