古い車を

an old car

→ 古い
phrase Rare #24,211
an old car 古い車 means “old car,” and を marks it as the direct object of a verb. This phrase is usually followed by a verb, such as 処分する (to dispose of) or 買う (to buy).
JA: 私は古い車を売りました。
EN: I sold my old car.

あの古い車を本気で買おうと思っているんですか

Are you seriously thinking of buying that old car?

彼らは古い車を処分した

They got rid of their old car.

トム古い車を処分した

Tom got rid of his old car.

彼は古い車を新車と交換した

He traded his old car for a new one.

彼はいまだに古い車を愛用している

He still uses his old car.