“Sonja” is the eleventh vehicle built by the Drumska Strela team and the second fully electric Formula Student car developed at the University of Belgrade.

All of that work was confirmed during the 2025 season, when Drumska Strela represented Serbia at the Formula Student competitions in Croatia, Poland and Italy. The season is remembered as one of the most successful in the team’s history: a historic appearance with two cars in Croatia, excellent results in the static disciplines in Poland, and in Italy the Endurance race was completed for the first time since 2017, with 8th place in that discipline and 14th place overall.