For the 2010 season, Charouz became the Renault F1 Team reserve driver. As reserve driver he participates in Renault F1 Team test sessions, and he could be recruited for Grand Prix Friday free practices in official colours of Renault F1 Team. On March 18, 2010, Charouz drove the Renault R29 for the first time in his career during a shakedown at the Silverstone Circuit in Great Britain.
HRT Team reserve driver
On 16 November 2011, Charouz drove for the HRT F1 Team at the Yas Marina Circuit for the Abu Dhabi young drivers' test. After completing 56 laps (311 km), over 4 stints, he finished the day in 11th position with a time of 1’46.644.[2] It was later announced, on 24 November, that Charouz would replace Vitantonio Liuzzi for the first practice of the final round of the 2011 F1 season - the Brazilian Grand Prix.[3] The test in Abu Dhabi allowed Charouz to take part in Brazil because it secured him his FIA Super Licence - meaning he could take part in an F1 Grand Prix weekend.
Successful cooperation with factory Aston Martin Racing team continued also in season 2009 and similar programme as in previous two seasons was prepared for Jan. He participated in complete 2009 Le Mans Series season and 2009 24 Hours of Le Mans however team presented itself with brand new built prototype Aston Martin LMP1. Jan Charouz together with his teammates Tomáš Enge (CZE) and Stefan Mucke (GER) finished fourth in 24 hours of Le Mans, driving Aston Martin LMP1 #007 car. Jan Charouz, Tomáš Enge and Stefan Mucke with Aston Martin Racing were crowned the 2009 Le Mans Series champions claiming the Team and Driver titles 50 years on from Aston Martin winning the World Sportscar Championship in 1959 with the DBR1. The 007 LMP1 car of Jan, Tomáš and Stefan recording five podium finishes (including two wins at Barcelona and Nürburgring) from five races.