| 14.4.1991 | 430 km Suzuka | 2 | Mercedes-Benz C291 | Wendlinger / Schumacher | Team Sauber Mercedes | DNF |
| 5.5.1991 | 430 km Monza | 2 | Mercedes-Benz C291 | Schumacher / Wendlinger | Team Sauber Mercedes | DNF |
| 19.5.1991 | 430 km Silverstone | 2 | Mercedes-Benz C291 | Wendlinger / Schumacher | Team Sauber-Mercedes | 2nd |
| 23.6.1991 | 24 h Le Mans | 1 | Mercedes-Benz C11 | In entry list only | Team Sauber Mercedes | DNF |
| 23.6.1991 | 24 h Le Mans | 2 | Mercedes-Benz C291 | Kreutzpointner / *Schumacher | Team Sauber Mercedes | DNQ |
| 23.6.1991 | 24 h Le Mans | 31 | Mercedes-Benz C11 | Wendlinger / Schumacher / Kreutzpointner | Team Sauber Mercedes | 5th |
| 18.8.1991 | 430 km Nürburgring | 2 | Mercedes-Benz C291 | Schumacher / Wendlinger | Team Sauber Mercedes | T-car |
| 18.8.1991 | 430 km Nürburgring | 2T | Mercedes-Benz C291 | Schumacher / Wendlinger | Team Sauber Mercedes | DNF |
| 15.9.1991 | 430 km Magny-Cours | 2 | Mercedes-Benz C291 | Schumacher / Wendlinger | Team Sauber Mercedes | T-car |
| 15.9.1991 | 430 km Magny-Cours | 2T | Mercedes-Benz C291 | Schumacher / Wendlinger | Team Sauber Mercedes | DNF |
| 6.10.1991 | 430 km Mexico City | 1 | Mercedes-Benz C291 | Schlesser / Mass / *Schumacher | Team Sauber Mercedes | DNF |
| 6.10.1991 | 430 km Mexico City | 2 | Mercedes-Benz C291 | Wendlinger / Schumacher | Team Sauber Mercedes | DNF |
| 28.10.1991 | 430 km Autopolis | 1T | Mercedes-Benz C291 | Schlesser / Mass / *Schumacher | Team Sauber Mercedes | 5th |
| 28.10.1991 | 430 km Autopolis | 2 | Mercedes-Benz C291 | Schumacher / Wendlinger | Team Sauber Mercedes | 1st |