自動車事故で

in a car accident

→ 自動車事故
phrase Rare #40,541
in a car accident で marks the cause or circumstance of an event. 自動車事故 means “car accident,” and the phrase is used with events such as being injured, losing someone, or dying.
JA: 彼は自動車事故でけがをした。
EN: He was injured in a car accident.

彼女は自動車事故で負傷した

She was injured in a car accident.

毎年多くの人々が自動車事故で亡くなっている

Many people die in car accidents every year.

あの人って奥さん例の自動車事故でなくしたですか

Is that the person who lost his wife in that car accident?

彼女は自動車事故で息子を失った

She lost her son in a car accident.