Early years Čolak started racing in karting with much of his young career was spent in
Germany, including
Formula Renault 2.0 Germany and the German SEAT Leon Cupra Cup. He also competed in some races of the
Formula Renault 2000 Eurocup in 2001 and 2002. In 2008, he competed in the new
SEAT León Eurocup, where he ended the year as runner-up.
Accident In November 2010, according to Croatian reports, Čolak was involved in a road accident in Croatia. The reports say that a female passenger, Ivana Opak (20), was killed in the crash. Čolak escaped with minor injuries. In 2016, he was sentenced to six years in jail for this deadly crash.
World Touring Car Championship As a reward for winning a race at
Brands Hatch, Čolak was entered in two rounds of the
FIA World Touring Car Championship with the SEAT backed
SUNRED Engineering team. For 2009, Čolak entered the WTCC for a full season with an independent petrol powered
SEAT Leon, under the Croatia Čolak Ingra Seat banner. ==Racing record==