Removal and Installation

WARNING: This page is about a different car, the 2011 Mercury Milan and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Rear sensor

With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING & LIFTING article.
Both sensors
Disconnect the Heated Oxygen Sensor (HO2S) electrical connector.

NOTE: If necessary, lubricate the sensor threads with penetrating and lock lubricant to assist in removal.

Fig 1: Removing Heated Oxygen Sensor Using Exhaust Gas Oxygen Sensor Socket

Courtesy of FORD MOTOR CO.

Using the Exhaust Gas Oxygen Sensor Socket, remove the HO2S.
- Calculate the correct torque wrench setting for the following torque. Refer to the Torque Wrench Adapter Formulas in the illustration.
  
  Fig 2: Torque Wrench Adapter Formulas
  Courtesy of FORD MOTOR CO.
- To install, tighten to 48 Nm (35 lb-ft).

NOTE: Apply a light coat of anti-seize lubricant to the threads of the HO2S.

To install, reverse the removal procedure.