[1] He made his debut in the World Rally Championship in 2006, on Rallye Deutschland, in a Mitsubishi Lancer Evo VIII, finishing in 39th position.

He also finished Wales Rally GB in a Ford Fiesta ST. 2007 saw Weijs enter six rounds of the WRC in an Evo IX.

Weijs entered the Junior World Rally Championship (JWRC) in 2008 in a Citroën C2 R2 Max with the continued support of KNAF Talent First programme.

In 2010 Weijs won in Germany and scored two further podiums prior to the final round of the season in Catalunya.

However, a crank sensor failure dropped him to third, which allowed Burkart, who finished the rally fourth, to win the title.