The car will probably be repossessed.
It's almost unheard of for a car to be Repo'd because of one missed payment or bounced check, there has to be a history of non or late payment in order for them to take the car.
Immediately make the check good.
The minimum down payment required for a car purchase with a 50 down payment is 50 of the total cost of the car.
No, you do not need a down payment for car insurance.
Yes, you can use a cashier's check to make your car payment.
In effect, the car isn't paid off. If you check your documentation, you will find that they can do that. If the cheque bounced, the payments haven't been made.
The car dealer is not required to collect a down payment. The finance company is the one who usually asks for it. If they desire a down payment, they will contact you to get it.
Interest and down payment.
No.
The down payment on a car reduces the amount of money you need to borrow, which can lower your monthly payment amount. A larger down payment typically results in a smaller monthly payment, while a smaller down payment usually leads to a higher monthly payment.
If you refinance a car another down payment is usually not required. I refinanced a car to lower to payments and it added another year to the payoff date of the car. I wasn't required to give a down payment.