LONDON -- McLaren will return to full-time IndyCar racing in 2020 in partnership with Arrow Schmidt Peterson Motorsports and Chevrolet.
McLaren will be responsible for technical expertise, commercial experience and marketing for the race team in North America's top open-wheel racing circuit.
The British automaker sold more sports cars in the United States than anywhere else last year.
The move could give Spanish driver Fernando Alonso, the double Formula One world champion who remains under contract to McLaren, another chance to win the Indianapolis 500 even if the Spaniard is not interested in a full season.
Arrow Schmidt Peterson Motorsports will be renamed Arrow McLaren Racing SP and compete using two Chevrolet-powered cars and a possible third entry for Indianapolis.
Former Indy 500 winner Gil de Ferran, the sporting director of McLaren Racing, will lead a dedicated group independent of McLaren's Formula One team.
McLaren last competed full-time for the IndyCar championship in 1979.
"We come to IndyCar in full respect of the sport, our competitors, the fans and the task ahead," McLaren Racing CEO Zak Brown said.
"It's definitely a very integrated partnership, technically, managerially and commercially," he said on a conference call.
He said McLaren, which faces a likely record 22-race season in Formula One in 2020 and is also contemplating world endurance racing in 2021, when the rules change to hypercars, is not taking on more than it can handle.
McLaren has been mulling a full IndyCar campaign for some time and its decision was influenced when Alonso failed to qualify for this year's Indianapolis 500 as a one-off entry.
Brown said Alonso, who left Formula One at the end of last year, still wanted to win Indianapolis and McLaren wanted to do so with him.
"He has not shown to date interest in competing in a full season," he added.
"(For) Fernando, or someone else potentially, we would consider a third car entry at Indy only."
Canadian driver James Hinchcliffe is committed through 2020 with Schmidt Peterson while Swedish former F1 driver Marcus Ericsson will be out of contract at the end of the year.
Alonso wants to become only the second driver after the late Briton Graham Hill to win the "Triple Crown of Motorsport" and has already won the Monaco Grand Prix and Le Mans 24 Hours. Indianapolis is the only remaining race to win.
This year's Indy 500 winner Simon Pagenaud told Reuters last weekend that Alonso's best chances of success at The Brickyard would hinge on doing a full season or racing with an experienced team.
McLaren made a catalog of errors at Indianapolis this year, from having to secure a steering wheel at short notice to missing vital track time because the spare car was the wrong shade of orange and was elsewhere being resprayed.
"We came away from that experience stronger than ever in our desire to compete in IndyCar," said Brown.
"But we knew we would have to go about it differently, which was either be fully committed or don't do it.