1 | 4 | Monaco Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 20 | Turbo |
2 | 5 | Canadian Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 18 | Turbo |
3 | 6 | Detroit Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 13 | Clutch |
4 | 7 | French Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 18 | Fuel System |
5 | 8 | British Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 9 | Transmission |
6 | 9 | German Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 1 | Clutch |
7 | 10 | Austrian Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 6 | Electrical |
8 | 11 | Dutch Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 5 | Wheel |
9 | 13 | Belgian Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 11 | Throttle |
10 | 14 | European Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 20 | Engine |
11 | 15 | South African Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 7 | Engine |
12 | 16 | Australian Grand Prix | 19 | Toleman Group Motorsport | Toleman TG185 | Hart 415T | 24 | Engine |