YOU SAID:
I need to get a new car
INTO JAPANESE
新しい車を買う必要がある
BACK INTO ENGLISH
i need to buy a new car
INTO JAPANESE
新しい車を買わなければなりません
BACK INTO ENGLISH
i have to buy a new car
INTO JAPANESE
新しい車を買わなければなりません
BACK INTO ENGLISH
i have to buy a new car
That didn't even make that much sense in English.