The principal is the amount of money you borrowed to purchase the car, free of any interest. If you initially borrowed $26,532.00 to buy a car, that’s what your principal would be. As you make your regular payments, the remaining principal will shrink. Just keep in mind that most of your initial payments will go to interest, so the principal will take a while to decrease.
By the end of the loan, your principal should hit zero, but due to interest you will end up paying more than the initial amount you borrowed. Some lenders may allow you to make principal-only payments to shorten the life of the loan and incur less interest over time.