Does a co-signer have the right to take the vehicle from the owner if the payments are not made?

if you didnt make the payment/s then you are in "default" of the loan agreement.

the co-signer or bank can take it back.

in order to get it back you must become current w/ payments or if they sell it then your responsible for any money lost if it sells for less than the loan.

read the contract, its in there.

A cosigner would only have rights to a vehicle if their name is on the title. Due process, and a court order, is the only way to take possession of the vehicle in question. That could only be done with the consent of the lender.