| 🇺🇸United States Grand Prix 1974 | 6 Oct 1974 | Iso Marlboro | 15 | Electrical | |
| 🇨🇦Canadian Grand Prix 1974 | 22 Sept 1974 | Iso Marlboro | 19 | Handling | |
| 🇮🇹Italian Grand Prix 1974 | 8 Sept 1974 | Iso Marlboro | 15 | 4 | 3 |
| 🇦🇹Austrian Grand Prix 1974 | 18 Aug 1974 | Iso Marlboro | 9 | Fuel system | |
| 🇩🇪German Grand Prix 1974 | 4 Aug 1974 | Iso Marlboro | 16 | Throttle | |
| 🇬🇧British Grand Prix 1974 | 20 Jul 1974 | Iso Marlboro | 15 | Engine | |
| 🇫🇷French Grand Prix 1974 | 7 Jul 1974 | Iso Marlboro | 15 | 9 | |
| 🇳🇱Dutch Grand Prix 1974 | 23 Jun 1974 | Iso Marlboro | 21 | Gearbox | |
| 🇲🇨Monaco Grand Prix 1974 | 26 May 1974 | Iso Marlboro | 14 | Collision | |
| 🇧🇪Belgian Grand Prix 1974 | 12 May 1974 | Iso Marlboro | 6 | Transmission | |
| 🇪🇸Spanish Grand Prix 1974 | 28 Apr 1974 | Iso Marlboro | 7 | Accident | |
| 🇿🇦South African Grand Prix 1974 | 30 Mar 1974 | Iso Marlboro | 3 | 6 | 1 |
| 🇧🇷Brazilian Grand Prix 1974 | 27 Jan 1974 | Iso Marlboro | 9 | Throttle | |
| 🇦🇷Argentine Grand Prix 1974 | 13 Jan 1974 | Iso Marlboro | 13 | Overheating | |