Power Brake Unit: Notes
WARNING: This page is about a different car, the 2004 Nissan Pathfinder, 2003 Nissan Pathfinder, and 2002 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
DO NOT disassemble brake booster. After air-tight and operational tests, replace complete assembly if problem is determined to be in brake booster.