Ferrari sent Sebastian Vettel’s gearbox to Maranello after a horror outing in Malaysia, fearing that a replacement would cost Vettel five penalty places on the grid this Sunday.
However, Ferrari says the gearbox is in fact "still available" to use in Japan.
As cited by wheels24, a Ferrari source said: "Only the outer casing of the gearbox was damaged.
"That can be replaced without a penalty."
The source added: "It's our best news for weeks."
Watch: Ferrari's Sebastian Vettel returns to the pit area with a ride from Sauber's Pascal Wehrlein after the 2017 Malaysian Grand Prix.