Removal and Installation

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

With vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING & LIFTING .
Disconnect the battery ground cable. For additional information, refer to BATTERY, MOUNTING AND CABLES .
Disconnect the heated oxygen sensor (HO2S) electrical connector.

NOTE: If necessary, lubricate the HO2S with lock lubricant to aid in removal.

Remove the HO2S from the exhaust manifold using the special tool and discard.
- To install, tighten to 48 Nm (35 lb-ft).
  
  Fig 1: Removing HO2S From Exhaust Manifold
  Courtesy of FORD MOTOR CO.

NOTE: Do not reuse HO2S. If removed, a new sensor must be installed.

To install, reverse the removal procedure.
- Apply a light coat of anti-seize lubricant to the threads of the HO2S.