The 2003 London Champ Car Trophy was a Championship Auto Racing Teams (CART) motor race held on 5 May 2003 at the Brands Hatch Indy Circuit in West Kingsdown, Kent, England in front of a crowd of just under 40,000 spectators. It was the fourth round of the 2003 CART season, the first American open wheel car race at the track since 1978, and the first of two European races of the season. Sébastien Bourdais of the Newman/Haas Racing team won the 165-lap race after he started from the second position. His teammate Bruno Junqueira finished second and Mario Domínguez of Herdez Competition took third.