With the FW03 repaired, Jo Vonlanthen was signed to drive in Austria, and he qualified down in 28th position. He retired from the race with engine failure. Vonlanthen also drove the FW03 in the non-championship Swiss Grand Prix, starting on the back row and finishing unclassified, nine laps down. Renzo Zorzi replaced him for the Italian Grand Prix, qualifying 22nd and finishing 14th. The FW03 was finally retired before the season-ending US Grand Prix, as a second FW04 had been built, although both cars failed to start.