*ナンバー[プレート]（なんばー[ぷれーと]）”license plate”
→When it is clear that we are talking about a car, we often omit the プレート (ぷれーと) part and simply call it ナンバー (なんばー).
*[ドア]ミラー（[どあ]みらー）”mirror”
→To distinguish it from the interior rear view mirror, it is called ドアミラー (どあみらー) with an ドア (どあ), but it is often just called ミラー (みらー).
*[カー]ナビ（[かー]なび）”GPS”
→カーナビ (かーなび) stands for a car navigation system, which we often call ナビ (なび) for short.
*ハンドブレーキ（はんどぶれーき）”parking brake”
→Many recent cars are equipped with a parking brake that is not a hand-pull but a foot-push one. The foot pedal parking brake is called a フットブレーキ (ふっとぶれーき).
*給油する（きゅうゆする）”to fuel”
→You can also say ガソリンを入れる (がそりんをいれる) when you fuel a car.