Newmar Corporation (Newmar) is recalling certain model year 2008 and 2009 Grand Star Class A motorhomes built on Freightliner Custom Chassis (FCCC) from January 25, 2007, through May 22, 2009. These motorhomes chassis are equipped with Bosch hydraulic disc brakes which, when exposed to long periods of time of non-driving, may experience diametrical brake caliper piston growth and reduced piston to bore clearance potentially leading to brake drag and overheating resulting in reduced brake performance.