Red Bull will use Honda engines until 2020 after agreeing a new two-year deal with the Japanese manufacturer.
The team had faced a straight choice between continuing with current partner Renault or switching to Honda. After analysing the latest upgrades from both manufacturers at the Canadian Grand Prix it sided with Honda, which has supplied its sister team Toro Rosso with engines since the start of the year.
It is the first time since its return to F1 in 2015 that Honda has supplied two teams on the grid after after spending three disastrous years partnered with McLaren.