Coulthard is in the last year of his contract with Red Bull

Red Bull finished seventh overall last season but have new cars from top designer Adrian Newey this year, powered by new Renault engines.

"We have to achieve more or people will have to be replaced," said Coulthard.

"Having Adrian at the helm focuses the minds of talented engineers and our partnership with Renault is good.

Coulthard, at 35 the oldest driver on the Formula One grid, took the team's first podium in 2006 and said he was glad to be renewing his old partnership with Newey from their days at McLaren.

"My 13 wins have all been in Adrian's cars. This is a chance to renew the partnership," he said.

"These are exciting times. Now we have to see the lap times and how competitive the car is," said Coulthard.

The new Renault-powered RB3 is due to be unveiled in Barcelona on Friday.