The Red Bull Racing RB3 is a Formula One racing car produced by Red Bull Racing for the 2007 season. It was the team's first Adrian Newey-designed car and used Renault RS27 engines, after the team's contract with Ferrari was transferred to the Toro Rosso team.

Controversy surrounded the Red Bull and Toro Rosso teams during the 2007 launch season as a row over customer cars erupted. Both Williams and Spyker claimed that the cars of the two teams were identical, having been designed by Red Bull Technology, a third-party subsidiary of the Red Bull parent company. Thus, the teams themselves did not design their respective cars themselves, which Williams and Spyker believed was a breach of F1's Concorde Agreement. The FIA however declared that the cars were legal for 2007. Gerhard Berger, Christian Horner and other Toro Rosso and Red Bull Racing staff have also stated that they had their legal representatives confirm that the cars they were running were legal and that the operations they had set up (two teams running the same chassis, designed by Red Bull Technology) were legal.

The car, in the hands of both Mark Webber and David Coulthard, is seen to have point-scoring pace, highlighted by Webber's series of top-ten qualifying positions and Coulthard running fastest in the pre-race Barcelona testing. The design is distinctly Adrian Newey, bearing a resemblance to past cars such as the 2005 McLaren MP4-20. However, like the McLaren, poor reliability and mechanical problems have hampered the drivers on numerous occasions. Problems included things as trivial as faulty brake pedals and notoriously jamming fuel-flaps. However the most pressing reliability issue was the introduction of a seamless-shift gearbox to the car, which resulted in numerous race retirements for both Mark Webber and David Coulthard, such as at the Monaco and Canadian Grands Prix respectively.

...
Wikipedia