M-Sport entered the Ford Fiesta WRC, based on the Fiesta RS WRC and updated to fit the 2017 regulations. The team secured Sébastien Ogier and Julien Ingrassia to drive one car, and re-hired Ott Tänak, who returned to the team after contesting the 2016 season with DMACK World Rally Team. Tänak changed co-drivers, with Martin Järveoja replacing Raigo Mõlder. Elfyn Evans and Daniel Barritt returned to the premier class after contesting the 2016 season in the WRC-2 category, swapping places Eric Camilli and Benjamin Veillas, who stayed with M-Sport and were entered in the WRC-2.
M-Sport continues to operate their customer programme, with Adapta World Rally Team returning to the sport and merging with Jipocar Czech National Team, starting the season from the 65th Rally Sweden. Mads Østberg and Ola Fløene will compete in one, with the team expanding to two cars later in the season; the second will be driven by Martin Prokop, who will himself return to the World Rally Championship after missing the second half of the 2016 season. DMACK World Rally Team will no longer operate as a customer team, instead becoming a partner and supplier of M-Sport, providing tyres and sponsorship for Elfyn Evans’ entry.