。
She got out of the car.
Literal
She [topic-は] car [from-から] got-off.
車から降りる (to get out of a car) uses から (from) to mark the vehicle being exited, and 降りる (おりる) for the act of getting off/out. This pattern works for all vehicles: バスから降りる (get off a bus), 電車から降りる (get off a train). 降りる is the intransitive 'descend/get off,' contrasting with 乗る (to get on/ride).