| 20.3.1983 | DRM Zolder Bergischer Löwe | 1 | #104 | Bob Wollek | Warsteiner Team, Joest-Racing | 1st |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 4 | #105 | Clemens Schickentanz | Joest-Racing-Team | 6th |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 10 | #109 | Jürgen Lässig | H. Obermaier Racing GmbH | DNF |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 11 | #102 | John Fitzpatrick | John Fitzpatrick Racing | 2nd |
| 3.4.1983 | 500 km Suzuka | 1 | #108 | Fujita / Schuppan | Trust Racing Team | 1st |
| 10.4.1983 | 1000 km Monza | 1 | #005 | Ickx / Mass | Rothmans Porsche | 2nd |
| 10.4.1983 | 1000 km Monza | 1T | #004 | Ickx / Mass / Bell / Holbert | Rothmans Porsche | T-car |
| 10.4.1983 | 1000 km Monza | 2 | #007 | Bell / Holbert | Rothmans Porsche | 7th |
| 10.4.1983 | 1000 km Monza | 11 | #104 | Wollek / Boutsen | Joest Racing | 1st |
| 10.4.1983 | 1000 km Monza | 12 | #105 | Schickentanz / Stommelen / Heyer | Joest Racing | 3rd |
| 10.4.1983 | 1000 km Monza | 14 | #106 | Lammers / Needell / Lloyd | Canon Racing | 6th |
| 10.4.1983 | 1000 km Monza | 16 | #102 | Fitzpatrick / Hobbs | John Fitzpatrick Racing | 5th |
| 10.4.1983 | 1000 km Monza | 18 | #109 | Plankenhorn / Barth / Lässig | Obermaier Racing | 4th |
| 1.5.1983 | DRM Avus | 1 | #104 | Bob Wollek | Joest Racing | 1st |
| 1.5.1983 | DRM Avus | 2 | #105 | Volkert Merl | Joest Racing | 2nd |
| 1.5.1983 | DRM Avus | 10 | #109 | Jürgen Lässig | Obermaier Racing GmbH | 4th |
| 8.5.1983 | 1000 km Silverstone | 1 | #005 | Ickx / Mass | Rothmans Porsche | DNF |
| 8.5.1983 | 1000 km Silverstone | 1T | #004 | | Rothmans Porsche | T-car |
| 8.5.1983 | 1000 km Silverstone | 2 | #007 | Bell / Bellof | Rothmans Porsche | 1st |
| 8.5.1983 | 1000 km Silverstone | 8 | #104 | Wollek / Johansson | Sorga SA | 2nd |
| 8.5.1983 | 1000 km Silverstone | 11 | #102 | Fitzpatrick / Hobbs | John Fitzpatrick Racing | 8th |
| 8.5.1983 | 1000 km Silverstone | 12 | #105 | Schickentanz / Heyer / Merl | Joest Racing | DNF |
| 8.5.1983 | 1000 km Silverstone | 14 | #106 | Lammers / Boutsen | Canon Racing | 3rd |
| 8.5.1983 | 1000 km Silverstone | 18 | #109 | Plankenhorn / Grohs / Lässig | Boss-Obermaier Racing | 4th |
| 8.5.1983 | 1000 km Silverstone | 21 | #101 | Jones / Schuppan | Porsche Kremer Racing | 5th |
| 8.5.1983 | 1000 km Silverstone | 47 | #103 | Henn / Edwards / Keegan | Henns' T-Bird Swap Shop | DNF |
| 15.5.1983 | DRM Mainz-Finthen | 1 | #104 | Bob Wollek | Joest Racing | 1st |
| 15.5.1983 | DRM Mainz-Finthen | 2 | #105 | Volkert Merl | Joest Racing | 3rd |
| 29.5.1983 | 1000 km Nürburgring | 1 | #005 | Mass / Ickx | Rothmans Porsche | 1st |
| 29.5.1983 | 1000 km Nürburgring | 2 | #007 | Bellof / Bell | Rothmans Porsche | DNF |
| 29.5.1983 | 1000 km Nürburgring | 3 | #003 | Bellof / Ickx / Mass | Rothmans Porsche | T-car |
| 29.5.1983 | 1000 km Nürburgring | 8 | #104 | Wollek / Johansson | Sorga S.A. (Joest-Racing) | 2nd |
| 29.5.1983 | 1000 km Nürburgring | 11 | #102 | Fitzpatrick / Hobbs | John Fitzpatrick Racing | 6th |
| 29.5.1983 | 1000 km Nürburgring | 12 | #105 | Heyer / Boutsen / Rosberg | Joest-Racing | DNA |
| 29.5.1983 | 1000 km Nürburgring | 14 | #106 | Rosberg / Lammers / Palmer | Canon Racing | 3rd |
| 29.5.1983 | 1000 km Nürburgring | 18 | #109 | Plankenhorn / Heyer / Lässig | Boss-Obermaier Racing | 4th |
| 5.6.1983 | 500 km Fuji | 6 | #108 | Fujita / Schuppan | Trust Racing Team | 1st |
| 5.6.1983 | Can-Am Mosport | | #104 | Bob Wollek | Joest Racing | DNA |
| 19.6.1983 | 24 h Le Mans | 1 | #005 | Ickx / Bell | Rothmans Porsche | 2nd |
| 19.6.1983 | 24 h Le Mans | 2 | #008 | Mass / Bellof | Rothmans Porsche | DNF |
| 19.6.1983 | 24 h Le Mans | 3 | #003 | Schuppan / Holbert / Haywood | Rothmans Porsche | 1st |
| 19.6.1983 | 24 h Le Mans | 8 | #104 | Johansson / Ludwig / Wollek | Sorga S.A. | 6th |
| 19.6.1983 | 24 h Le Mans | 11 | #110 | Fitzpatrick / Hobbs / Quester | Fitzpatrick Racing | DNF |
| 19.6.1983 | 24 h Le Mans | 12 | #105 | Merl / Schickentanz / DeNarvaez | Sorga S.A. | 4th |
| 19.6.1983 | 24 h Le Mans | 14 | #106 | Lammers / Palmer / Lloyd | Canon Racing | 8th |
| 19.6.1983 | 24 h Le Mans | 16 | #102 | Edwards / Keegan / Fitzpatrick | Fitzpatrick Racing | 5th |
| 19.6.1983 | 24 h Le Mans | 18 | #109 | Plankenhorn / Wilson / Lässig | Obermaier Racing | 7th |
| 19.6.1983 | 24 h Le Mans | 21 | #101 | Andretti / Andretti / Alliot | Porsche Kremer Racing | 3rd |
| 19.6.1983 | 24 h Le Mans | 33 | #004 | Ickx / Bell / Schuppan / Barth | Rothmans Porsche | T-car |
| 19.6.1983 | 24 h Le Mans | 47 | #103 | Henn / Schlesser / Ballot-Léna | Fitzpatrick Racing | 10th |
| 3.7.1983 | DRM Norisring | 1 | #104 | Bob Wollek | Warsteiner-Team/Joest-Racing | 1st |
| 3.7.1983 | Norisring Trophäe | 1 | #104 | Bob Wollek | Warsteiner-Team, Joest-Racing | 3rd |
| 3.7.1983 | Norisring Trophäe | 2 | #105 | Volkert Merl | Joest-Racing | DNF |
| 3.7.1983 | DRM Norisring | 2 | #105 | Volkert Merl | Joest-Racing | 3rd |
| 3.7.1983 | Norisring Trophäe | 8 | #005 | Jochen Mass | Rothmans Porsche | 2nd |
| 3.7.1983 | Norisring Trophäe | 9 | #008 | Stefan Bellof | Rothmans Porsche | 1st |
| 3.7.1983 | DRM Norisring | 10 | #102 | John Fitzpatrick | John Fitzpatrick Racing | DNF |
| 3.7.1983 | Norisring Trophäe | 10 | #102 | David Hobbs | John Fitzpatrick Racing | DNF |
| 3.7.1983 | DRM Norisring | 11 | #110 | John Fitzpatrick | John Fitzpatrick Racing | DNA |
| 3.7.1983 | Norisring Trophäe | 11 | #110 | John Fitzpatrick | John Fitzpatrick Racing | 4th |
| 3.7.1983 | Norisring Trophäe | 12 | #101 | Keke Rosberg | Porsche Kremer Racing | 5th |
| 3.7.1983 | Norisring Trophäe | 19 | #111 | Harald Grohs | Liqui Moly Equipe | DNF |
| 3.7.1983 | Norisring Trophäe | 21 | #106 | Jan Lammers | Canon Racing | 14th |
| 3.7.1983 | DRM Norisring | 21 | #106 | Jan Lammers | Canon Racing | raced |
| 3.7.1983 | Norisring Trophäe | 22 | #109 | Jürgen Lässig | Boss-Obermeier-Racing GmbH | DNS |
| 3.7.1983 | DRM Norisring | 119 | #111 | Brun | Brun Motorsport | DNF |
| 3.7.1983 | DRM Norisring | 122 | #109 | Jürgen Lässig | Boss-Obermaier-Racing GmbH | DNF |
| 10.7.1983 | Erding [S/GT] | 29 | #109 | | Obermaier Racing GmbH | DNA |
| 17.7.1983 | Can-Am Road America | 11 | #110 | John Fitzpatrick | John Fitzpatrick | 1st |
| 24.7.1983 | DRM Diepholz | 2 | #105 | Volkert Merl | Joest Racing | DNF |
| 24.7.1983 | 1000 km Fuji | 6 | #108 | Fujita / Schuppan | Trust Racing Team | 1st |
| 24.7.1983 | DRM Diepholz | 10 | #101 | Franz Konrad | Porsche Kremer Racing | 1st |
| 24.7.1983 | DRM Diepholz | | #104 | Bob Wollek | Joest Racing | 4th |
| 14.8.1983 | Interserie Most | 12 | #111 | Walter Brun | Brun Motorsport GmbH | 1st |
| 28.8.1983 | 1000 km Suzuka | 1 | #108 | Fujita / Schuppan | Trust Racing Team | 1st |
| 4.9.1983 | 1000 km Spa | 1 | #005 | Mass / Ickx | Rothmans Porsche | 1st |
| 4.9.1983 | 1000 km Spa | 2 | #004 | Bellof / Bell | Rothmans Porsche | 2nd |
| 4.9.1983 | 1000 km Spa | 3 | | | Rothmans Porsche | unused |
| 4.9.1983 | 1000 km Spa | 8 | #104 | Johansson / Wollek | Sorga S.A. | DNF |
| 4.9.1983 | 1000 km Spa | 11 | #102 | Fitzpatrick / Hobbs | J. Fitzpatrick Racing UK | 3rd |
| 4.9.1983 | 1000 km Spa | 12 | #105 | Merl / Heyer / Wollek | Sorga S.A. | DNF |
| 4.9.1983 | 1000 km Spa | 14 | #106 | Lammers / Boutsen | Canon Racing | 9th |
| 4.9.1983 | 1000 km Spa | 18 | #109 | Plankenhorn / Regout / Lässig | Obermaier Racing GmbH | 5th |
| 4.9.1983 | 1000 km Spa | 21 | #101 | Warwick / Konrad | Porsche Kremer Racing | DNF |
| 4.9.1983 | 1000 km Spa | 33 | #111 | Stuck / Grohs / Brun | Brun Motorsport GmbH | 4th |
| 11.9.1983 | Can-Am Mosport II | 11 | #110 | John Fitzpatrick | JDavid Racing | 3rd |
| 18.9.1983 | 1000 km Brands Hatch | 12 | #105 | Schornstein / Heyer | Sorga S.A. | DNA |