The 2003 MBNA America 400 was the 28th stock car race of the 2003 NASCAR Winston Cup Series season and the 35th iteration of the event.

[1] To fill out the podium, Jeremy Mayfield of Evernham Motorsports and Tony Stewart of Joe Gibbs Racing would finish second and third, respectively.

In addition to NASCAR, the track also hosted USAC and the NTT IndyCar Series.

[3] The first practice session was held on Saturday, September 20, at 11:15 AM EST, and would last for one hour and 15 minutes.

[3] Jimmie Johnson of Hendrick Motorsports would set the fastest time in the session, with a lap of 23.472 and an average speed of 153.374 miles per hour (246.832 km/h).