Sebastian Ogier will defend his World Rally Championship crown with M-Sport in 2018 alongside Elfyn Evans.
Ogier was left with the choice of retirement or carrying on with M-Sport into 2018 after talks with Citroen broke down.
The Frenchman sealed his fifth WRC title in October’s Rally GB.
“It’s great to finally announce our plans for 2018,” Ogier said.
“What we have achieved together has been truly amazing, and we want to see that continue – to continue this fantastic journey and to defend all that we have achieved together.
“This season has been very exciting with some of the closest-fought competition for years. As a driver, I definitely want to be a part of that. I still get a lot of emotion from this sport, and this team has so much passion.
“That made my decision clear, and we will work hard to chase more success together next year.”
Ogier’s team-mate Ott Tanak moves to Toyota for 2018 while Evans moves from a DMACK-shod Fiesta to a Michelin rubbered Fiesta next year.
Evans, who picked up his maiden rally victory in Wales, will continue with Malcolm Wilson’s team for a fourth full-time WRC campaign in 2018.
“After a fantastic season for the whole team, it’s great that we’ll be a part of it again next year,” Evans said.
“After getting that first victory under our belts, we’re ready to take the next step and I think we all have another exciting season ahead of us.
“Honestly, I can’t wait to get back behind the wheel and Rallye Monte-Carlo can’t come soon enough.
“We’ll be working hard over the Christmas break to ensure we’re fully prepared, and the goal will be to build on the success of this year.”
An announcement on who will be driving the third Fiesta next season is expected before the end of the year.