Argentine rider Kevin Benavides ended the defence of his Dakar Rally title on Wednesday when his KTM motorcycle broke down on the 10th stage in Saudi Arabia and he retired from the event.
The 33-year-old had been fifth overall, some 10 minutes behind his Austrian teammate and overnight leader Matthias Walkner.
Organisers said Benavides stopped 133km into the 375km special stage between Wadi Ad Dawasir and Bisha with a mechanical problem that he was unable to fix.
Benavides won last year's Dakar on a Honda, becoming the first South American to win the event in the motorcycle category.
The rally, now in its 44th edition, ends in Jeddah on Friday.