The Buick LaCrosse is a mid-size car produced by the Buick division of American automaker General Motors since 2004 as the 2005 model year. The LaCrosse, only available as a four-door sedan, replaces the Buick Century, Buick Regal and the Oldsmobile Intrigue after General Motors discontinued the brand. Its namesake is the Buick LaCrosse concept car shown beginning in 2000. Some model years have keyless entry remote fob smart keys that are onboard programmable, which means a person can program the keyless entry remote fob smart key with no special equipment. However, other model years of the LaCrosse are not onboard programmable and require special equipment in order to program the keyless entry remote fob smart key.