When Kubica became the reserve driver for the BMW Sauber Formula One team?

Question

Kubica has served at prominent car racing positions, he even got the chance of racing for the BMW Sauber Formula One team. I would like to know, when Kubica became the reserve driver for the BMW Sauber Formula One team?

Answer 1

In 2006, Kubica became the official reserve driver for the BMW Sauber Formula One team.[4] His results in both Friday testing and private test sessions, along with the words of BMW Sauber team principal Mario Theissen, led to speculation that he would become Poland's first ever Formula One racing driver in 2007.