"Kurt Busch showed disrespect toward a media member, an incident that followed similar inappropriate media confrontations earlier in the season
," NASCAR said in a statement announcing the penalty.
Busch had a transmission problem early in Sunday's race that sent his Penske Racing
Dodge to the garage. His in-car camera caught him making an obscene gesture during that time.
While his team made repairs, Busch waited to be interviewed by an ESPN
reporter, and a fan videotaped Busch being verbally abusive while waiting to go live.
That video was posted on YouTube, and both Penske officials and Busch have apologized in separate statements for his behavior.
He lost all composure during a race at Richmond in May, when he berated his team and Penske management over his in-car radio.
Busch's sponsor Shell/Pennzoil said in a statement it was disappointed with the driver.
"Shell and Pennzoil are disappointed with recent actions by driver Kurt Busch at the final race of the 2011 NASCAR Sprint Cup Series
race season," the company said in a statement. "His actions are in no way consistent with the way we want our brands represented and we have expressed our disappointment and concerns directly to Penske Racing."
At the same track in September, he had an angry post-race confrontation on pit road with another reporter, then continued the argument before his formal news conference. He also ripped apart another reporter's papers the same evening.