Removal and Installation

WARNING: This page is about a different car, the 2010 Mercury Milan and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the Heated Oxygen Sensor (HO2S) electrical connector.
Using the Exhaust Gas Oxygen Sensor Socket, remove the HO2S .
- Calculate the correct torque wrench setting for the following torque. Refer to Torque Wrench Adapter Formulas in illustration.
  
  Fig 1: Identifying Torque Wrench Adapter Formulas
  Courtesy of FORD MOTOR CO.
- To install, tighten to 48 Nm (35 lb-ft).
NOTE: If necessary, lubricate the sensor threads with penetrating and lock lubricant to assist in removal.

Fig 2: Disconnecting Heated Oxygen Sensor (HO2S) Electrical Connector
Courtesy of FORD MOTOR CO.
To install, reverse the removal procedure.
NOTE: Apply a light coat of anti-seize lubricant to the threads of the HO2S .