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