A father can't use his son's name to buy a car. If you apply for a loan in the name of your son, then the owner of the vehicle in this case is your son. Your son's name is also on the vehicle registration certificate, and the loan is also in his name. This is no different from your son buying his own car. Therefore, it is best to handle the loan business with your own ID card, so that the name of the vehicle driving license is your own.
If something goes wrong, you can't deal with it directly, and your son needs to sort it out, which is very troublesome. So this is not recommended.