Pieniążek made his WRC debut at 2016 Rally de Portugal, driving a Citroën DS3 R3T Max in the WRC-3 and J-WRC categories.
One year later, he was promoted to the WRC-2 category.

At 2018 Rally de Portugal, he scored his first WRC points, finishing ninth in the overall standings.
The rally was also his first-ever podium finish in the WRC-2 championship.

On January 10, 2019, it was confirmed by M-Sport Ford that Pieniążek would contest for selected events in the newly-created WRC-2 Pro championship.
In Guanajuato and Corsica, he won the Pro class.
Pieniążek made his WRC debut at 2016 Rally de Portugal, driving a Citroën DS3 R3T Max in the WRC-3 and J-WRC categories. One year later, he was promoted to the WRC-2 category.
At 2018 Rally de Portugal, he scored his first WRC points, finishing ninth in the overall standings. The rally was also his first-ever podium finish in the WRC-2 championship.
On January 10, 2019, it was confirmed by M-Sport Ford that Pieniążek would contest for selected events in the newly-created WRC-2 Pro championship. In Guanajuato and Corsica, he won the Pro class.
Łukasz Pieniążek