The Junior World Rally Championship was open to drivers born after 1 January 1988—although no such restriction existed for co-drivers—and they competed in identical one-litre Ford Fiesta R2s built and maintained by M-Sport, with DMACK tyres. Crews who contested the Junior World Rally Championship were also eligible to score points in the World Rally Championship-3. The championship was competed over six European WRC rounds.Nil Solans was crowned champion at the end of the season.
The championship will also adopt the prize format of the Drive DMACK Fiesta Trophy in which the season will be divided into "stages" and a prize awarded to the top-placed driver in each stage (contrary to the previous Junior World Rally Championship, in which there was only one prize). The driver with most points after the first two rallies will be awarded two drives in the 2018 World Rally Championship-2 in a Ford Fiesta R5. The driver with most points scored in the second pair of rallies will win an equal prize, as will the top-placed driver in the third pair of rallies. Additionally, an extra prize drive will be awarded to the overall winner of the category.
The season started with the Tour de Corse where Nil Solans won the event from start to finish. After building a lead of more than 40 seconds in the first Leg, he managed he was chased by local Terry Folb, until a driveshaft problem made him lost his second place to fellow Frenchman Nicolas Ciamin.