Red Bull Racing will continue with Renault engines in 2010 as part of the company's renewed commitment to Formula 1.
Although Red Bull was listed with Renault power on the provisional 2010 entry list issued by the FIA, the continued uncertainty over Renault's future F1 plans meant the deal could not be fully confirmed.
But in announcing that its factory team would stay in F1 in partnership with Gerard Lopez's Genii Capital organisation, Renault also said that it would remain as engine supplier to RBR for a fourth season.
Team boss Christian Horner was pleased to continue Red Bull Racing's relationship with Renault.
"2009 has been Red Bull Racing's finest season to date. In one year, we've achieved six wins and four one-two finishes, none of which would have been possible without the excellent support and assistance we have received from our partners at Renault," he said.
"We are extremely happy with the way they work with us and are looking forward to continuing our fruitful partnership with Renault in 2010."
Red Bull had also been linked to a move to Mercedes or Cosworth power, but the former option was vetoed by Mercedes' then primary team McLaren.