Audi returned to the FIA World Endurance Championship winner's circle in Bahrain as Andre Lotterer, Benoit Treluyer and Marcel Fassler claimed victory to increase their lead at the head of the title race.
The two-time Le Mans-winning trio led home an Audi one-two after six hours of racing on the Bahrain International Circuit.
They triumphed by nearly two laps over the sister R18 e-tron quattro shared by Allan McNish and Tom Kristensen, which lost time with overheating rear brakes and then two changes of nose section when one of the headlights failed.
Toyota's aspirations of a second consecutive WEC win were derailed by an electrical glitch affecting the illuminated number panels.
The Toyota had led the race in the hands of Alex Wurz and Nicolas Lapierre from seven laps into the opening stint. The car was holding a lead of approximately 20 seconds early in the third hour when the team was forced to effect repairs.
Lapierre and then Wurz were able to bring the Toyota back into third place ahead of the LMP1 privateers before the former tangled with the Strakka Racing HPD driven by Jonny Kane, damaged his suspension and had to abandon the car out on track.