Joan Roma of Spain won the third stage of the Dakar Rally on Tuesday while Krzysztof Holowczyc of Poland led overall.
Frenchman Cyril Despres won the motorcycle stage to claim first place overall.
Compatriot Sebastien Coue was in critical condition after crashing during the second stage. Coue was found in sand dunes in western Argentina, and hospital officials said it was not clear how long he had been unconscious and exposed to temperatures above 40 degrees C (104 F).
The Dakar Rally, considered one of the most dangerous in motor sports, has already claimed three lives this year. Argentine bike rider Jorge Martinez Boero died in a crash in Sunday's first stage. On the same day, the pilot of an ultralight plane and his son died when the aircraft went down while following the race.
Roma, driving a Mini, won the 208-kilometer (130-mile) special stage from San Rafael to San Juan in central Argentina in 2 hours, 26 minutes, 51 seconds.
He was 1:09 ahead of Holowczyc and 1:29 in front of last year's overall winner in cars, Nasser Al-Attiyah, who is driving a Hummer.
Holowczyc, also in a Mini, led the overall by 54 seconds in front of American Robby Gordon in a Hummer. Giniel Devilliers of South Africa is 1:40 behind the leader in his Toyota.
In bikes, Despres took the 270-kilometer (170-mile) special stage in 3:48:38. The KTM rider finished 8:37 in front of Frans Verhoeven of the Netherlands on a Sherco, and 8:39 faster than Portuguese Paulo Goncalves on a Husqvarna.
Defending bike champion Marc Coma of Spain, the leader after stage two, made a navigational error losing himself on the route and finished in seventh place, 13:04 behind KTM teammate Despres.