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O2 Sensor: Removal: Sensor-Oxygen

WARNING: This page is about a different car, the 2008 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable.
Disconnect electrical connector from O2 sensor.
Remove sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent.