With proper maintenance probably forever
The 2004 Buick Regal is 16 ft. 4.2 in. (196.2 in.) long.
The 2003 Buick Regal is 16 ft. 4.2 in. (196.2 in.) long.
The 2014 Buick Regal is 15 ft. 10.2 in. (190.2 in.) long.
The 2013 Buick Regal is 15 ft. 10.2 in. (190.2 in.) long.
The 2002 Buick Regal is 16 ft. 4.2 in. (196.2 in.) long.
The 2012 Buick Regal is 15 ft. 10.2 in. (190.2 in.) long.
The 2011 Buick Regal is 15 ft. 10.2 in. (190.2 in.) long.
The 2001 Buick Regal is 16 ft. 4.2 in. (196.2 in.) long.
i have the same problem with my 1996 buick regal . i think it could be related to the long antenna lead , coming from the top of the rear quarter panel , all of the way to the dashboard . i tried to find a "trimmer" , to adjust , on the radio , but was unsuccessful .
The 2012 Buick Regal has a 6 yr./ 100000 mi. warranty against rust.
The 2014 Buick Regal includes 6 yr./ 70000 mi. of roadside assistance.
The 2004 Buick Regal has a 6 yr./ 100000 mi. warranty against rust.