| 26.1.2003 | Mil Milhas Brasileiras | 73 | | Alessi / Zonca / Bonaldi / Mondino | Uniesse/Marine | 5th |
| 2.2.2003 | 24 h Daytona | 69 | #E36 STC 95 020 | Cunningham / Plumb / Friedman / Stanton | Marcus Racing | 13th |
| 1.3.2003 | 250 mile Homestead | 5 | #E46 GT 004 | Stanton / Said | Bell Motorsports | 10th |
| 1.3.2003 | 250 mile Homestead | 69 | #E36 STC 95 020 | Cunningham / Plumb | Marcus Motorsports | 8th |
| 15.3.2003 | 12 h Sebring | 40 | #E46 GT 003 | Said / Jones / de Quesada | Alegra Motorsports | 37th |
| 30.3.2003 | GT Aida | 15 | #E46 GT 002 | Hashimoto / Kwan | Amprex Motorsport | 27th |
| 30.3.2003 | GT Aida | 21 | | Hitotsuyama / Namekawa | Hitotsuyama Racing | DNF |
| 13.4.2003 | Belcar Zolder NRF | 52 | | Beliën / Jakobs | Beliën Racing | 13th |
| 13.4.2003 | Belcar Zolder NRF | 53 | | Carlier / Pasteels | Carlier Racing | 29th |
| 13.4.2003 | Belcar Zolder NRF | 56 | | Meijers / Meijers | Meijers Motorsport | 30th |
| 13.4.2003 | Belcar Zolder NRF | 57 | | Severich / Kenis | G&A Racing | DNS |
| 13.4.2003 | Belcar Zolder NRF | 58 | | Jeuris / van Samang | EL Racing | 31st |
| 13.4.2003 | Belcar Zolder NRF | 59 | | Aerts / Moonens | KS-Motorsport | 22nd |
| 13.4.2003 | Belcar Zolder NRF | 73 | | Moore / Cox | Moore Int. Motorsport | DNF |
| 13.4.2003 | Belcar Zolder NRF | 74 | | De Keersmaecker / Buytaert | G&A Racing | DNF |
| 13.4.2003 | Belcar Zolder NRF | 75 | | Van Cleemputte / Gabriël | MVC Racing Team | DNF |
| 27.4.2003 | Belcar Zolder WSN | 52 | | Beliën / Jakobs | Beliën Racing | 20th |
| 27.4.2003 | Belcar Zolder WSN | 53 | | Carlier / Pasteels | Carlier Racing | DNF |
| 27.4.2003 | Belcar Zolder WSN | 56 | | Meijers / Broekmans | Meijers Motorsport | 22nd |
| 27.4.2003 | Belcar Zolder WSN | 57 | | Kenis / Severich | G&A Racing | 9th |
| 27.4.2003 | Belcar Zolder WSN | 58 | | Jeuris / Werckx | EL Racing | 30th |
| 27.4.2003 | Belcar Zolder WSN | 59 | | Aerts / Moonens | KS-Motorsport | 34th |
| 27.4.2003 | Belcar Zolder WSN | 73 | | Moore / Redhouse | Moore Int. Motorsport | DNF |
| 27.4.2003 | Belcar Zolder WSN | 74 | | De Keersmaecker / Van Delm | G&A Racing | 12th |
| 27.4.2003 | Belcar Zolder WSN | 75 | | Van Cleemputte / Gabriël | MVC Racing Team | 25th |
| 27.4.2003 | Belcar Zolder WSN | 77 | | Beckers / Cassiers | MSE Racing | 31st |
| 3.5.2003 | 250 mile Phoenix | 09 | #WBSBF91020JF80576 | Russell | Automatic Racing | 26th |
| 3.5.2003 | 250 mile Phoenix | 5 | #E46 GT 004 | Stanton / Fitzgerald | Bell Motorsports | 3rd |
| 3.5.2003 | 250 mile Phoenix | 69 | #E36 STC 95 020 | Plumb / Cunningham | Marcus Motorsports | 10th |
| 3.5.2003 | 250 mile Phoenix | 90 | #WBSBL93411JR12224 | Earwood | Automatic Racing | 28th |
| 4.5.2003 | 500 km Fuji | 15 | #E46 GT 002 | Hashimoto / Kwan | Amprex Motorsport | 23rd |
| 4.5.2003 | 500 km Fuji | 21 | | Hitotsuyama / Namekawa | Hitotsuyama Racing | DNF |
| 11.5.2003 | Belcar Spa Belpro | 52 | | Beliën / Jakobs | Beliën Racing | 38th |
| 11.5.2003 | Belcar Spa Belpro | 53 | | Carlier / Pasteels | Carlier Racing | 32nd |
| 11.5.2003 | Belcar Spa Belpro | 56 | | Meijers / Meijers | Meijers Motorsport | 20th |
| 11.5.2003 | Belcar Spa Belpro | 57 | | Severich / Kenis | G&A Racing | 9th |
| 11.5.2003 | Belcar Spa Belpro | 59 | | Aerts / Lippens | KS-Motorsport | 29th |
| 11.5.2003 | Belcar Spa Belpro | 73 | | Moore / Cox | Moore Int. Motorsport | DNS |
| 11.5.2003 | Belcar Spa Belpro | 74 | | De Keersmaecker / Van Delm | G&A Racing | 26th |
| 11.5.2003 | Belcar Spa Belpro | 75 | | Van Cleemputte / Gabriël | MVC Racing Team | 27th |
| 11.5.2003 | Belcar Spa Belpro | 77 | | Beckers / Cassiers | MSE Racing | 19th |
| 18.5.2003 | 250 mile Barber | 09 | #WBSBF91020JF80576 | van Cleef | Automatic Racing | 24th |
| 18.5.2003 | 250 mile Barber | 5 | #E46 GT 004 | Boris Said | Bell Motorsports | DNA |
| 18.5.2003 | 250 mile Barber | 69 | #E36 STC 95 020 | Cunningham / Plumb | Marcus Motorsports | 5th |
| 18.5.2003 | 250 mile Barber | 90 | #WBSBL93411JR12224 | van Cleef / Earwood | Automatic Racing | DNS |
| 25.5.2003 | Sugo GT | 15 | #E46 GT 002 | Hashimoto / Kwan | Amprex Motorsport | DNF |
| 25.5.2003 | Sugo GT | 21 | | Hitotsuyama / Matsumoto | Hitotsuyama Racing | 29th |
| 1.6.2003 | 24 h Nürburgring | 10 | | Scheid / Kainz / Merten | Scuderia Augustusburg Brühl e.V. im ADAC | 5th |
| 1.6.2003 | 24 h Nürburgring | 42 | | Stuck / Said / Duez / Nielsen | BMW Motorsport | DNF |
| 1.6.2003 | 24 h Nürburgring | 43 | | Müller / Müller / Duez / Hürtgen | BMW Motorsport | DNF |
| 1.6.2003 | 24 h Nürburgring | 52 | | Moore / Cox / Barrow | | 9th |
| 1.6.2003 | 24 h Nürburgring | 53 | | Wolfsgruber / Gehring / Kiesch / E.-Schnür | Rheydter Club für Motorsport | 13th |
| 1.6.2003 | 24 h Nürburgring | 54 | | Tischner / Tischner / Thal / Lorenzo | | DNF |
| 1.6.2003 | 24 h Nürburgring | 58 | | Kleinherbers / Behling / Drabiniok / Duve | | DNF |
| 1.6.2003 | 24 h Nürburgring | 62 | | Palmer / Boylan / Morgan / Hansen | Duller Motorsport | DNF |
| 1.6.2003 | 24 h Nürburgring | 63 | | Lloyd / Bolz / Seher / Weber | | 39th |
| 1.6.2003 | 24 h Nürburgring | 64 | | Adams / Fries / Wenger / Riess | | 8th |
| 1.6.2003 | 24 h Nürburgring | 69 | | Brooks / Wilson / Mountain | | DNF |
| 1.6.2003 | 24 h Nürburgring | 71 | | Müller / Abels / Gassen / Seidel | | 21st |
| 1.6.2003 | 24 h Nürburgring | 72 | | Leone / Piodi / Leone | | 72nd |
| 1.6.2003 | 24 h Nürburgring | 74 | | Obermann / Stetter / Tilke / Hulverscheid | MSC Ruhr-Blitz Bochum e.V. im ADAC | 14th |
| 1.6.2003 | 24 h Nürburgring | 78 | | Giuliani / Ragazzi / Biava / Melloni | MSC Rhön e.V. im AvD | 113th |
| 1.6.2003 | 24 h Nürburgring | 81 | | Baumgartner / Waser / Baumgartner / Tischner | | 101st |
| 1.6.2003 | 24 h Nürburgring | 83 | | Nöhring / Gallasch / Eickholt / Pflanz | | DNF |
| 1.6.2003 | 24 h Nürburgring | 84 | | de Thoisy / Castagné / Cohignac | Duller Motorsport | DNF |
| 1.6.2003 | 24 h Nürburgring | 85 | | Bonk / Bonk / Silvester / Braumüller | | DNF |
| 1.6.2003 | 24 h Nürburgring | 87 | | Kast / Smolski / Möhle / Meyersrenken | | DNF |
| 1.6.2003 | 24 h Nürburgring | 89 | | Rentel / Engelsberg / Fuchs / Karageorgos | | 90th |
| 1.6.2003 | 24 h Nürburgring | 90 | | Cowgill / Lockie / Euser | | 116th |
| 1.6.2003 | 24 h Nürburgring | 91 | | Lusuardi / Acri / Pindari / Bottazzi | | DNF |
| 1.6.2003 | 24 h Nürburgring | 101 | | Förster / Schneck / Pingel / Frichot | Soda-Club-Team | 140th |
| 1.6.2003 | 24 h Nürburgring | 102 | | Karl / Wehner / Bauer | Soda-Club-Team | 15th |
| 1.6.2003 | 24 h Nürburgring | 187 | | Timperanza / Naues / Dodd / Scholze | | 144th |
| 1.6.2003 | 24 h Nürburgring | 189 | | Salzer / Salzer | DSK "Ja zum Motorsport" | 65th |
| 1.6.2003 | 24 h Nürburgring | 192 | | Lobe / Frey / Moufang / Frey | | 76th |
| 1.6.2003 | 24 h Nürburgring | 197 | | Hancke / Peter / Truelove / Krumbach | DMC Dürener Motorsportclub | 35th |
| 1.6.2003 | 24 h Nürburgring | 198 | | Böhm / Mundorf / Haack / Ehleiter | Dolate Motorsport | 23rd |
| 1.6.2003 | 24 h Nürburgring | 199 | | Scalini / Saccomanno / Corolli / Grimoldi | MSC Rhön e.V. im AvD | 94th |
| 1.6.2003 | 24 h Nürburgring | 200 | | Shaw / Miller / Warwick | Matador Deutschland GmbH | 122nd |
| 1.6.2003 | 24 h Nürburgring | 233 | | Simoncini / Cairati / Cairati | | DNF |
| 1.6.2003 | 24 h Nürburgring | 234 | | Schild / Werner / Raab / Schlüter | | 36th |
| 8.6.2003 | 400 km Fontana | 09 | #WBSBF91020JF80576 | Russell | Automatic Racing | 20th |
| 8.6.2003 | 400 km Fontana | 5 | #E46 GT 004 | Boris Said | Bell Motorsports | DNA |
| 8.6.2003 | Belcar Spa SER | 52 | | Beliën / Jakobs / Cuyvers | Beliën Racing | 17th |
| 8.6.2003 | 400 km Fontana | 69 | #E36 STC 95 020 | Cunningham / Plumb | Marcus Motorsports | 14th |
| 8.6.2003 | 400 km Fontana | 90 | #WBSBL93411JR12224 | van Cleef | Automatic Racing | 21st |