no they dont work that way. when you finance the car, it's who applies at the time and if they or you qualify. and if you qualify you wont need a cosigner. if you do, when you apply you'll find out lol. if you do, then you'll be declined and they will tell you to go get one.
If you are approved for a loan, why would you need a co-signer later? To get a lower interest rate? In that case I think you can.
NEVER (emphasis) borrow money to buy a car. Pay cash or DO NOT buy. You will thank me later.
no