IF your savings is currently in < 1.9% and you do not plan to move it to higher interest-bearing accounts, or invest it, it's definitely better to pay off the car up front, in full.
IF you plan to invest it, it's a gamble, because 48 months is a short enough time period that investments could easily lose value rather than gain value. So it might have been better to pay off the car, or it might end up better to utilize the loan to move money into investments and get a better return.
IF it cripples your emergency fund or nest egg, it's probably not worth getting a new car (though the used car market does suck right now).
Like TheAnonOne, while I've taken out low interest car loans in the past, I usually get annoyed having that on my balance sheet, and start to pay it off aggressively well before the term ends. But depending on your personal situation, if a new car is your best option, and you won't spend more than you would otherwise when choosing financing, it could very well be a good situation for you. It's reversible - by selling the car, or by paying off the loan if you change your mind.