page_title: Sauber C21
section_title: Developments
hierarchical_section_title: Sauber C21 / Developments
caption_attribution_description: Deutsch: Sauber-Petronas C22 Leistung: ca. 800 PS Höchstgeschwindigkeit: 350 km/h Gewicht 600 kg (inkl. Fahrer) Fahrer: Nick Heidfeld Heinz Harald Frentzen
context_page_description: The Sauber C21 was the car with which the Sauber team competed in the 2002 Formula One season. The car was driven by Nick Heidfeld, Felipe Massa and Heinz-Harald Frentzen.
context_section_description: There was a steady flow of development upgrades for the C21 throughout 2002. However, the team was not able to match its efforts in 2001, largely due to the absence of an in-house wind tunnel and the diverted effort involved in building one (which would eventually become operational during the 2004 season). Steps forward were made with the C21's aerodynamics, floor, engine cover, front wing and weight reduction, but wind tunnel work ended in August as the team shifted its focus to the following year's C22.
  The Ferrari engine was also developed, with two improvements in performance being made during the course of the season, as was the gearbox and traction control system. Despite these improvements, however, the team's form dipped in the latter stages of the year. The team redesigned the front end of the car in time for the Belgian Grand Prix and fitted the car with a more conventional nosecone.
caption: The Sauber C21 with the 2003 livery of the C22 chassis.