Dario Franchitti sealed his third Indycar championship victory at the Homestead oval in Miami.
Will Power led the championship going into the final race but he brushed the wall and broke his right-rear suspension shortly after half distance. He briefly returned to the track after repairs but later retired for good.
Franchitti survived a scare when Milka Duno lost control and crashed in front of him late in the race.
But he finished the race in eighth place which was enough to secure the title by five points.
Franchitti’s team mate Scott Dixon won the race ahead of Danica Patrick and Tony Kanaan – the Andretti Autosport duo disputing second place until the chequered flag fell.
Power had led the championship after every round of the season except following the race in Texas, where Franchitti moved ahead for one round.
Franchitti’s championship is his third consecutive win in years when he has participated in the series. He also won in 2007 and 2009 but missed the 2008 championship while making an unsuccessful bid at racing in NASCAR.
In 1999 he tied on points with Champ Car champion Juan Pablo Montoya but lost the championship as Montoya had won more races.
Read more: Why you should watch?óÔéĽ?Ş IndyCar