The Sauber C31 was a Formula One racing car designed by Sauber for use in the 2012 Formula One season. The car was driven by Kamui Kobayashi and Sergio Pérez. Technical director James Key announced that he was leaving the team just four days before the C31 was due to be launched at Jerez de la Frontera.
Unlike previous cars such as the Sauber C29 and to a lesser extent, the C30, the C31 has much more visual sponsorship applied to the car such as Telmex, Telcel, Claro, Chelsea FC, Tequila Cuervo, Visit México, Oerlikon, Nec and Certina. Many of which are Mexican based companies brought from driver Sergio Pérez and reserve driver Esteban Gutiérrez.
The Sauber C31 finished the 2012 season in a very respectable sixth place with 126 points (as much as a private team since 1993), two fastest laps (China and Monaco), four podiums (Malaysia, Canada, Italy and Japan) and 13 Q3. The car proved to be fast and very competitive, though inconsistent to find the set-up in some circuits and, above all, at the time of the race qualifications.
Source: Wikipedia (original)