British American Racing
Several team changes took place before the season began. Both McLaren and Lotus changed engine suppliers for the 2015 season. McLaren ended their 20-year partnership with Mercedes-Benz, in favour of a return to Honda, who had previously supplied them from until 1992. Honda had been absent for seven years: they had provided British American Racing and Jordan Grand Prix with engines until they purchased the former in and then had competed as a constructor until .