Car dealership financed a new car for student. Student stopped making payments. Can dealership exercise its perfected security interest through the self$-$help remedy of repossessing the car?

Only if the student gives permission for repossessing it$.$

Yes so long as repossession can happen without a breach of the peace.

Yes so long as the dealer first gets a court order allowing the repossession.

It depends on the language in the UCC$-1.$