2003 NASCAR Busch Series

The 2003 NASCAR Busch Series began February 15 and ended November 15. Brian Vickers of Hendrick Motorsports won the championship.

Brian Vickers won the Busch Series championship at the age of 20.
David Green finished second in points.
Ron Hornaday Jr. finished third in points.
David Stremme the 2003 Busch Series Rookie of the Year.
Chevrolet won the manufacturer's championship after not winning for a year.