Stewart
Jan Magnussen terminou em P17 no Campeonato Mundial de 1998 com 1 ponto. Em 7 corridas: 0 vitórias, 0 pódios e 0 pole positions — melhor resultado P6.
| Round | Race | Team | Grid | Finish | Points | Status |
|---|---|---|---|---|---|---|
| 1 | Australian Grand Prix | Stewart | 18 | P20 | Collision | |
| 2 | Brazilian Grand Prix | Stewart | 16 | P10 | +2 Laps | |
| 3 | Argentine Grand Prix | Stewart | 22 | P21 | Transmission | |
| 4 | San Marino Grand Prix | Stewart | 20 | P21 | Transmission | |
| 5 | Spanish Grand Prix | Stewart | 18 |
| P12 |
| +2 Laps |
| 6 | Monaco Grand Prix | Stewart | 17 | P17 | Suspension |
| 7 | Canadian Grand Prix | Stewart | 20 | P6 | 1 | +1 Lap |