Kazuki Nakajima has been forced to retire from the overall lead of the WEC Six Hours of Spa, with smoke pouring out of the back of the No. 5 Toyota TS050 Hybrid.
The Toyota had led the second round of the FIA World Endurance Championship season for almost four hours until a reported engine failure struck it with one hour and 55 minutes remaining.
Nakajima completed an in-lap with smoke coming out of the exhaust, until he entered the pit garage. Team members swiftly crowded around the front of the car, blocking it from view.
Toyota Gazoo Racing has confirmed that both of its cars have now retired from the race.
Oliver Jarvis leads the race in the No. 8 Audi R18.