Frontier 2WD V6-3.3L (VG33E) (2003)
Vacuum Brake Booster: Testing and Inspection
Visual Inspection
CAUTION: Because vacuum hose contains a check valve, it must be installed in the correct orientation. Refer to the stamp or label to confirm correct
installation. The brake booster will not operate normally if the hose is installed in the wrong direction.
Do not use lubricating oil during assembly.
VISUAL INSPECTION
Check vacuum hose and connections for air tightness, improper attachment, chafing and deterioration. Repair or replace as necessary.