The 2003 24 Hours of Le Mans was a non-championship 24-hour automobile endurance race from 14 to 15 June 2003 at the Circuit de la Sarthe near Le Mans, France for teams of three drivers each entering Le Mans Prototype and Grand Touring cars before approximately 220,000 people. It was the race's 71st edition, as organised by the automotive group, the Automobile Club de l'Ouest (ACO) since 1923. A test day was held seven weeks prior to the race on 4 May.

The Bentley Speed 8 was an Autosport Award Winning Le Mans Prototype race car that was designed by Peter Elleray. The EXP Speed 8 debuted in the 24 Hours of Le Mans in 2001 and won the race in 2003. It has a strong resemblance to and shares some technology with the Audi R8C, which had raced only once before Audi dropped the project to focus on the later dominant Audi R8. The EXP Speed 8 marked Bentley's return to racing after a 73-year absence.