Carlos Pardo, 33, who was leading the race in the last lap, lost control of his car when he was hit by another driver, sending him crashing against a barrier.
Pardo was posthumously awarded the victory after Sunday's race concluded due to time limit expiration. In accordance with the series rule book, the finishing order reverted back to the last completed green-flag lap.
"Carlos Pardo was a tremendous competitor and person," said Chad Little, Director of Racing Development, NASCAR Mexico. "On behalf of everybody in the NASCAR family, our thoughts and prayers go out to Carlos' family and friends."
Pardo had competed in 74 NASCAR Mexico Series events with 10 career wins and claimed the 2004 series championship. He also competed in the 2006 NASCAR Nationwide Series race at Mexico City.
NASCAR, the major auto-racing league in the United States, sanctions a Mexican version run by a joint venture.
Racers in Mexico, where the league is operated by entertainment giant CIE and privately-held firm Selca, do not compete with American drivers.
Here's the crash and it's not pretty...