After the good results of the previous season, 1998 was a disaster for Prost. The car's main weakness was its gearbox: it was unreliable and heavy, which prevented the team from finishing races, upset the balance of the car and meant that the team could not optimise the position of its ballast, as many of its rivals could. The team also scraped into the season by a narrow margin after the chassis failed the mandatory FIA crash test three times.
With these problems allied with the relocation of the team's factory nearer Paris, the year turned into an exercise in damage limitation. Only one point was scored, at the chaotic 1998 Belgian Grand Prix, giving Prost 9th place in the Constructors' Championship. Only 8 cars finished the race with the two cars behind Trulli having spent so long in the pits being repaired their drivers were able to get out of the car for some time. In the final 6 laps Trulli lost an entire lap to the front runners with engine problems but still managed to finish.