The deal extends BMWC-s golf investment C1 it is already partners with the European Tour in the BMW Championship at Wentworth in May and is title sponsor of the BMW Asian Open and BMW International Open.
The company earlier this year also became official car to the European Tour.
George O'Grady, executive director of the European Tour, said: "They join a very special team of Ryder Cup partners and official suppliers all dedicated to ensuring the 2006 Ryder Cup at the K Club will be a unique sporting occasion and a total success."
Under the terms of the Ryder Cup agreement, BMW will provide a fleet of 40 courtesy cars for the use of players and officials during the tournament.
