WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not remove the check valve from the vacuum hose. If the check valve is defective, replace it together with the vacuum hose.
Fig 1: Removing/Installing Master Cylinder Assembly And Brake Booster