| 7.3.2003 | FIA GT Test Barcelona | 12 | Civic Type R | Couto / Hall | Pro Motorsport | 22nd |
| 30.3.2003 | GT Aida | 2 | NSX (GH-NA2) | Takahashi / Watanabe | Verno Tokai Dream 28 | 18th |
| 30.3.2003 | GT Aida | 8 | NSX (LA-NA2) | Tsuchiya / Kaneishi | Autobacs Racing Team Aguri | 11th |
| 30.3.2003 | GT Aida | 16 | NSX (LA-NA2) | Itou / Coronel | Mugen | 4th |
| 30.3.2003 | GT Aida | 18 | NSX (LA-NA2) | Michigami / Philippe | Dome Racing Team | 3rd |
| 30.3.2003 | GT Aida | 64 | NSX (LA-NA2) | Matsuda / Kogure | Mobil1 Nakajima Racing | 5th |
| 30.3.2003 | GT Aida | 100 | NSX (LA-NA2) | Katou / Mitsusada | Team Kunimitsu With Mooncraft | 7th |
| 4.5.2003 | 500 km Fuji | 2 | NSX (GH-NA2) | Takahashi / Watanabe | Verno Tokai Dream 28 | DNF |
| 4.5.2003 | 500 km Fuji | 8 | NSX (LA-NA2) | Tsuchiya / Kaneishi | Autobacs Racing Team Aguri | DNF |
| 4.5.2003 | 500 km Fuji | 16 | NSX (LA-NA2) | Itou / Coronel | Mugen | DNF |
| 4.5.2003 | 500 km Fuji | 18 | NSX (LA-NA2) | Michigami / Philippe | Dome Racing Team | DNF |
| 4.5.2003 | 500 km Fuji | 64 | NSX (LA-NA2) | Matsuda / Kogure | Mobil1 Nakajima Racing | 6th |
| 4.5.2003 | 500 km Fuji | 100 | NSX (LA-NA2) | Katou / Mitsusada | Team Kunimitsu With Mooncraft | 7th |
| 25.5.2003 | Sugo GT | 2 | NSX (GH-NA2) | Takahashi / Watanabe | Verno Tokai Dream 28 | 20th |
| 25.5.2003 | Sugo GT | 8 | NSX (LA-NA2) | Tsuchiya / Kaneishi | Autobacs Racing Team Aguri | 11th |
| 25.5.2003 | Sugo GT | 16 | NSX (LA-NA2) | Itou / Coronel | Mugen | 9th |
| 25.5.2003 | Sugo GT | 18 | NSX (LA-NA2) | Michigami / Philippe | Dome Racing Team | 7th |
| 25.5.2003 | Sugo GT | 64 | NSX (LA-NA2) | Matsuda / Kogure | Mobil1 Nakajima Racing | 8th |
| 25.5.2003 | Sugo GT | 100 | NSX (LA-NA2) | Katou / Mitsusada | Team Kunimitsu With Mooncraft | 35th |
| 1.6.2003 | 24 h Nürburgring | 33 | NSX-R | von Saurma-Jeltsch / Übler / Schurig / Oestreich | Sport Auto | 41st |
| 1.6.2003 | 24 h Nürburgring | 70 | NSX GT | Deutgen / Hahne / Kluck | Altschach Motorsport | DNF |
| 1.6.2003 | 24 h Nürburgring | 97 | Accord Type R | Yamamoto / Kalbassi / Starke | | 86th |
| 1.6.2003 | 24 h Nürburgring | 104 | Accord Type R | Hicks / Bell / McFarlene | | DNS |
| 1.6.2003 | 24 h Nürburgring | 111 | S2000 | Niedzwiedz / Schlesack / Jacksties / Mäder | | 143rd |
| 1.6.2003 | 24 h Nürburgring | 112 | S2000 | Niedzwiedz / Schlesack / Bartels / Mamerow | | 10th |
| 1.6.2003 | 24 h Nürburgring | 118 | Integra Type R | Keutmann / Trenery / Pfeifer / Erdmann | DSK "Ja zum Motorsport" | 136th |
| 1.6.2003 | 24 h Nürburgring | 144 | Civic V-Tec | Feyen / Esser / Freichels / Ecker | Scuderia Augustusburg Brühl e.V. im ADAC | 92nd |
| 1.6.2003 | 24 h Nürburgring | 146 | Civic V-Tec | Schjärin / Sandberg / Drössiger / Ebbesvik | | DNF |
| 1.6.2003 | 24 h Nürburgring | 191 | Accord Type R | Totz / Totz / Molzberger / Baumert | MSC Adenau e.V. im ADAC | 153rd |
| 1.6.2003 | 24 h Nürburgring | 196 | Accord Type R | Teichmann / Kreuer / Utsch / Müller | | 117th |
| 1.6.2003 | 24 h Nürburgring | 202 | Civic V-Tec | Herrmann / Hübenthal / Nolte | Motorsportclub Kirchheim/Teck | 112th |
| 1.6.2003 | 24 h Nürburgring | 204 | Integra Type R | Spurrell / Rimmer / Rimmer | | 48th |
| 1.6.2003 | 24 h Nürburgring | 206 | Civic V-Tec | Bauer / Spirit / Usui / Goto | Monkey Amateur Racing Team | 77th |
| 1.6.2003 | 24 h Nürburgring | 210 | Civic Type R | Horn / Schneider / Schumacher / Rikli | | 79th |
| 1.6.2003 | 24 h Nürburgring | 214 | Civic Type R | Schmitz / Ecker / Degner / Unteroberdörster | | 33rd |
| 1.6.2003 | 24 h Nürburgring | 215 | Civic Type R | Kohlmorgen / Neunkirchen / Wassertheurer / Göhringer | Team Bienert Motorsport | 64th |
| 1.6.2003 | 24 h Nürburgring | 216 | Civic Type R | Marsani / Keltsch / Kraus / "Best" | | 150th |
| 1.6.2003 | 24 h Nürburgring | 217 | Civic Type R | Prümmer / Scheefeldt / Hoppe / Fricke | | 149th |
| 1.6.2003 | 24 h Nürburgring | 218 | Civic Type R | Kuhlmann / Giesbrecht / Dubois / Scheuring | | 32nd |
| 1.6.2003 | 24 h Nürburgring | 219 | Civic Type R | Weiland / Rink / Lohmann / Borss | Scuderia Offenbach e.V. im AvD | 25th |
| 1.6.2003 | 24 h Nürburgring | 222 | Civic Type R | Viebahn / Schönauer / Schirra / Basseng | Schirra Motoring | DNF |
| 1.6.2003 | 24 h Nürburgring | 226 | Civic Type R | Mutsch / Podlogar / Warrings / Hilger | | 51st |
| 1.6.2003 | 24 h Nürburgring | 227 | Civic Type R | Thiel / Butenhoff / Radulovic / Dorband | Team Mintgen Motorsport | 27th |
| 1.6.2003 | 24 h Nürburgring | 230 | Civic Type R | Venn / Bermes / Allan | Fleper Motorsport | 47th |
| 13.7.2003 | JGTC Fuji | 2 | NSX (GH-NA2) | Takahashi / Watanabe | Verno Tokai Dream 28 | DNF |
| 13.7.2003 | JGTC Fuji | 8 | NSX (LA-NA2) | Kaneishi / Tsuchiya | Autobacs Racing Team Aguri | 10th |
| 13.7.2003 | JGTC Fuji | 16 | NSX (LA-NA2) | Itou / Coronel | Mugen | 9th |
| 13.7.2003 | JGTC Fuji | 18 | NSX (LA-NA2) | Philippe / Michigami | Dome Racing Team | 7th |
| 13.7.2003 | JGTC Fuji | 64 | NSX (LA-NA2) | Lotterer / Matsuda | Mobil1 Nakajima Racing | 12th |
| 13.7.2003 | JGTC Fuji | 100 | NSX (LA-NA2) | Katou / Mitsusada | Team Kunimitsu With Mooncraft | DNF |
| 3.8.2003 | Special GT Cup Fuji | 2 | NSX (GH-NA2) | Takahashi / Watanabe | Verno Tokai Dream 28 | 23rd |
| 3.8.2003 | Special GT Cup Fuji | 8 | NSX (LA-NA2) | Tsuchiya / Kaneishi | Autobacs Racing Team Aguri | 12th |
| 3.8.2003 | Special GT Cup Fuji | 16 | NSX (LA-NA2) | Itou / Coronel | Dome Racing Team | 8th |
| 3.8.2003 | Special GT Cup Fuji | 18 | NSX (LA-NA2) | Michigami / Philippe | Dome Racing Team | 1st |
| 3.8.2003 | Special GT Cup Fuji | 64 | NSX (LA-NA2) | Matsuda / Lotterer | Mobil1 Nakajima Racing | 9th |
| 3.8.2003 | Special GT Cup Fuji | 100 | NSX (LA-NA2) | Katou / Mitsusada | Team Kunimitsu With Mooncraft | 13th |
| 25.8.2003 | 1000 km Suzuka | 2 | NSX (GH-NA2) | Takahashi / Watanabe / Tomimoto | Verno Tokai Dream 28 | 7th |
| 25.8.2003 | 1000 km Suzuka | 3 | Integra Type R | Asano / Kasahara / Mizugaki | Asano Racing Service | 15th |
| 25.8.2003 | 1000 km Suzuka | 16 | NSX (LA-NA2) | Itou / Coronel | Dome Racing Team | 2nd |
| 25.8.2003 | 1000 km Suzuka | 18 | NSX (LA-NA2) | Michigami / Philippe | Dome Racing Team | 1st |
| 25.8.2003 | 1000 km Suzuka | 34 | Integra Type R | Iketani / Kawaguchi | Team Mdtss | DNF |
| 25.8.2003 | 1000 km Suzuka | 87 | Integra Type R | Kanamori / Satou / Taki | Q's Auto Factory Racing Team | 17th |
| 25.8.2003 | 1000 km Suzuka | 280 | NSX | Ooshiro / Maejima / Itou | | NC |
| 14.9.2003 | Motegi GT | 2 | NSX (GH-NA2) | Takahashi / Watanabe | Verno Tokai Dream 28 | 33rd |
| 14.9.2003 | Motegi GT | 8 | NSX (LA-NA2) | Tsuchiya / Kaneishi | Autobacs Racing Team Aguri | 8th |
| 14.9.2003 | Motegi GT | 16 | NSX (LA-NA2) | Itou / Coronel | Dome Racing Team | 1st |
| 14.9.2003 | Motegi GT | 18 | NSX (LA-NA2) | Michigami / Philippe | Dome Racing Team | 31st |
| 14.9.2003 | Motegi GT | 64 | NSX (LA-NA2) | Matsuda / Lotterer | Mobil1 Nakajima Racing | DNF |
| 14.9.2003 | Motegi GT | 100 | NSX (LA-NA2) | Katou / Mitsusada | Team Kunimitsu With Mooncraft | 5th |
| 26.10.2003 | Autopolis GT | 2 | NSX (GH-NA2) | Takahashi / Watanabe | Verno Tokai Dream 28 | 26th |
| 26.10.2003 | Autopolis GT | 16 | NSX (LA-NA2) | Itou / Coronel | Dome Racing Team | 10th |
| 26.10.2003 | Autopolis GT | 18 | NSX (LA-NA2) | Michigami / Montin | Dome Racing Team | DNF |
| 26.10.2003 | Autopolis GT | 64 | NSX (LA-NA2) | Matsuda / Lotterer | Mobil1 Nakajima Racing | 2nd |
| 26.10.2003 | Autopolis GT | 100 | NSX (LA-NA2) | Katou / Mitsusada | Team Kunimitsu With Mooncraft | 9th |