| 1.4.1973 | 4 h Le Mans | 35 | #911 350 1121 | Mignot / Mauroy | Rene Mazzia | 11th |
| 1.4.1973 | Le Mans Test | 35 | #911 350 1121 | Mignot / Mauroy | Rene Mazzia | 24th |
| 1.4.1973 | 4 h Le Mans | 36 | #911 230 0872 | Selz / Vetsch | Heinz Schiller | 10th |
| 1.4.1973 | Le Mans Test | 36 | #911 230 0872 | Vetsch / Selz | Heinz Schiller | 25th |
| 1.4.1973 | 4 h Le Mans | 38 | #911 010 1605 | Boucher / Jaunet / Guérin | Louis Meznarie | 12th |
| 1.4.1973 | 4 h Le Mans | 39 | #911 030 1013 | Carron / Aeschlimann | André Wicky Racing Team | DNF |
| 1.4.1973 | 4 h Le Mans | 40 | #911 030 1003 | Greub / Égreteaud | Porsche Club Romand | DNF |
| 8.4.1973 | SCCA National Virginia [BSR+CSR+CP] | 8 | | Jim Glanton | Jim Glanton | 2nd |
| 8.4.1973 | SCCA National Virginia [BSR+CSR+CP] | 58 | | Fred Keyser | Fred L. Keyser | DNF |
| 8.4.1973 | Hockenheim [GT/T] | 106 | | Kurt Peter | Kurt Peter | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 107 | | Hermann Schaffert | Herm. Schaffert | 6th |
| 8.4.1973 | Hockenheim [GT/T] | 121 | | Manfred Laub | Autohaus Max Moritz GmbH | ?th |
| 8.4.1973 | Hockenheim [GT/T] | 122 | | Albrecht Schütz | Albrecht Schütz | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 123 | | Paul Fromm | Paul Fromm | ?th |
| 8.4.1973 | Hockenheim [GT/T] | 124 | | Dieter Franke | Rallye- und Racing Gemeinschaft | DNF |
| 8.4.1973 | Hockenheim [GT/T] | 126 | #13448 | Horst Klauke | Braun Sixtant Racingteam | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 128 | | Günther Scheck | Günther Scheck | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 129 | | Peter Ehlert | Sixtant Racing Team | ?th |
| 8.4.1973 | Zolder [GT] | 156 | | Robert Seymour | Robert Seymour | 4th |
| 8.4.1973 | Zolder [GT] | 166 | | Martin Stein | Martin Stein | DNA |
| 8.4.1973 | Zolder [GT] | 167 | | Peter Stammeyer | Peter Stammeyer | 7th |
| 8.4.1973 | Zolder [GT] | 168 | | Harald Grohs | Harald Grohs | 1st |
| 8.4.1973 | Zolder [GT] | 169 | | Klaus Hartig | Klaus Hartig | DNF |
| 8.4.1973 | Zolder [GT] | 171 | | Karl Heinz Schramm | Hubert Engbert | 3rd |
| 8.4.1973 | Zolder [GT/T] | 204 | #13448 | Horst Klauke | Sixtant-Racing-Team | DNF |
| 8.4.1973 | Zolder [GT/T] | | | Werner Christmann | Werner Christmann | DNF |
| 15.4.1973 | Trans-Am Road Atlanta | 62 | #119 22 0830 | Bergstrom / Cook | Bob Bergstrom | 6th |
| 15.4.1973 | Trans-Am Road Atlanta | 66 | | Russ Norburn | | DNA |
| 15.4.1973 | Trans-Am Road Atlanta | 70 | #911 230 1222 | Dancose / Bienvenue | Marc Dancose | 12th |
| 15.4.1973 | Trans-Am Road Atlanta | 74 | #911 230 0934 | Heimrath / Minter | Heimrath Racing | 13th |
| 15.4.1973 | Trans-Am Road Atlanta | 84 | | Selbert / Glage | Airport Motorsport | 14th |
| 15.4.1973 | Trans-Am Road Atlanta | 94 | | Jerry Frydenlund | | DNA |
| 15.4.1973 | 60 mile Zolder | | | Gerhard Holup | Gerhard Holup | ?th |
| 15.4.1973 | 60 mile Zolder | | #002 0024 | Ernst Zupp | Ernst Zupp | ?th |
| 21.4.1973 | 3 h Daytona | 4 | | Bill Webbe | | 41st |
| 21.4.1973 | 3 h Daytona | 6 | | George Dickinson | G. W. Dickinson | 50th |
| 21.4.1973 | 3 h Daytona | 14 | | John Prasek | | 47th |
| 21.4.1973 | 3 h Daytona | 27 | | Stephen Behr | Toad Hall Motor Racing? | 39th |
| 21.4.1973 | 3 h Daytona | 32 | #119 22 0830 | Cook / Bergstrom | Bob Bergstrom | 10th |
| 21.4.1973 | 3 h Daytona | 51 | #911 230 0921 | Robert Kirby | | 31st |
| 21.4.1973 | 3 h Daytona | 53 | | John Graves | Dave Helmick? | 53rd |
| 21.4.1973 | 3 h Daytona | 68 | | George Rollin | | 15th |
| 21.4.1973 | 3 h Daytona | 75 | | Tom Kuenz | Tom Kuenz | 37th |
| 21.4.1973 | 3 h Daytona | 76 | #911 230 1514 | Downs / Stone | Silverstone Racing Team | 27th |
| 21.4.1973 | 3 h Daytona | 86 | #911 012 1866 | Milne / Lynch | James Lynch | 19th |
| 21.4.1973 | 3 h Daytona | 90 | #911 230 1222 | Bienvenue / Dancose | Marc Dancose | 21st |
| 21.4.1973 | 3 h Daytona | 92 | #911 012 2139 | Tillson / Oest | Holbert's Porsche-Audi | 35th |
| 22.4.1973 | DARM Zolder [GT] | 21 | #13448 | Horst Klauke | Sixtant-Racing-Team | DNF |
| 22.4.1973 | DARM Zolder [GT] | 24? | #911 030 1016 | Joel Braschet | | ?th |
| 22.4.1973 | DARM Zolder [GT] | | | Hermann Dahmen | Hermann Dahmen | 7th |
| 22.4.1973 | DARM Zolder [GT] | | | Harald Grohs | Harald Grohs | DNF |
| 22.4.1973 | DARM Zolder [GT] | | | Hans Hargarten | Hans Hargarten | ?th |
| 22.4.1973 | DARM Zolder [GT] | | | Peter Sieben | Rheydter Club für Motorsport | 6th |
| 22.4.1973 | DARM Zolder [GT] | | | Horst Kloft | Horst Kloft | 1st |
| 22.4.1973 | DARM Zolder [GT] | | #002 0024 | Ernst Zupp | E. Zupp | 4th |
| 22.4.1973 | DARM Zolder [GT] | | | Klaus Hartig | Klaus Hartig | 8th |
| 22.4.1973 | DARM Zolder [GT] | | | Wolfgang Kauwertz | Rheydter Club für Motorsport | 5th |
| 22.4.1973 | DARM Zolder [GT] | | | Helmut Königsdorff | Helmut Königsdorff | DNF |
| 29.4.1973 | DRM Nürburgring Eifelrennen | 21 | | Horst Sasse | Hasselbecker Racing-Team | 17th |
| 29.4.1973 | DRM Nürburgring Eifelrennen | 22 | | Jürgen Konrad | Jürgen Konrad | 10th |
| 29.4.1973 | Sweden Knutstorp | 27 | | Lennart Winkvist | Team Castrol | DNA |
| 29.4.1973 | Sweden Knutstorp | 34 | | Hans Wallberg | | 8th |
| 29.4.1973 | DRM Nürburgring Eifelrennen | 62 | #13448 | Horst Klauke | Team Europa Möbel | DNF |
| 29.4.1973 | DRM Nürburgring Eifelrennen | 63 | #119 12 xxxx# | Franz-Josef Rieder | Sixtant Racing Team | DNA |
| 29.4.1973 | DRM Nürburgring Eifelrennen | 69 | | Hans Hargarten | Hans Hargarten | 15th |
| 29.4.1973 | DRM Nürburgring Eifelrennen | 93 | | Peter Kuhlmann | Peter Kuhlmann | DNA |
| 29.4.1973 | GP Zolder [GT/S] | | | Guignard | | 4th |
| 1.5.1973 | Magny-Cours [GT] | 47 | #911 020 0699 | Guy Gentis | | 4th |
| 5.5.1973 | Trans-Am Lime Rock | 74 | #911 230 0934 | Ludwig Heimrath | Heimrath Racing | 9th |
| 5.5.1973 | Trans-Am Lime Rock | 90 | #911 230 1222 | Dancose / Bienvenue | Marc Dancose | 26th |
| 5.5.1973 | Trans-Am Lime Rock | 92 | #911 012 2139 | Tillson / Oest | Oest/Tillson Racing | 11th |
| 5.5.1973 | Trans-Am Lime Rock | | | Stone / Downs | Silverstone Ent. | 25th |
| 5.5.1973 | Trans-Am Lime Rock | | | Klaus Selbert | Airport Motorsport | 12th |
| 5.5.1973 | Trans-Am Lime Rock | | | Mollin / Weiss | AMRE | 13th |
| 6.5.1973 | 1000 km Spa | 49 | | Cyril Grandet | Grandet ORECA | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 436 | | Bernd Renneisen | Bernd Renneisen | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 437 | | Klaus Hering | VSA München | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 438 | | Edy Welti | FRC Zürich | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 439 | | Edi Kofel | Mascotte-Racing-Team | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 440 | | Jean-Claude Béring | Ecurie des Ordons | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 441 | | Roger Brunnschweiler | FRC Zürich | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 442 | | Edy Brandenberger | Scuderia Basilea | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 443 | | Friedrich Straumann | Ecurie Basilisk | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 444 | | Roger Favre | Mascotte-Racing-Team | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 445 | | Patrick Meschia | Ecurie de la Cote | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 450 | | Hans Hargarten | Hans Hargarten | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 454 | | Paul Fromm | Paul Fromm | DQ |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 455 | | Dieter Franke | Sixtant-Racing-Team | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 456 | | Alfred Kunze | Alfred Kunze | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 457 | | Reinhold Ernst | Reinhold Ernst | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 459 | #13448 | Horst Klauke | Sixtant-Racing-Team | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 463 | | Helmut Königsdorff | Helmut Köningsdorff | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 469 | | Horst Kloft | Horst Kloft | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 470 | #911 230 0987 | Wilhelm Bartels | Wilhelm Bartels | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 471 | | Max Müller | FRC Zürich | 4th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 472 | | Kurt Peter | Kurt Peter | 3rd |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 473 | #911 230 1417 | Heinz Grieder | FRC Zürich | 8th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 476 | | Fredy Lienhard | Liste Racing-Team | 9th |
| 13.5.1973 | Targa Florio | 122 | | Pizzo / Serse | | DNA |
| 13.5.1973 | Targa Florio | 124 | #911 130 0721 | Capra / Lepri | Girolama Capra | 12th |