Removal - 1/2 Downstream

The downstream heated oxygen sensor threads into the exhaust pipe behind the catalytic convertor. See Fig 1.

Fig 1: Upstream & Downstream 02 Sensors

Courtesy of DAIMLERCHRYSLER CORP.

1. Remove the air cleaner lid and makeup air hose.
2. Remove the negative battery cable.
3. Raise vehicle and support.
4. Disconnect electrical connector from sensor.
5. Disconnect sensor electrical harness from clips along body.
6. Remove sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent. See Fig 2.

Fig 2: Downstream Heated Oxygen Sensor & Catalytic Converter

Courtesy of DAIMLERCHRYSLER CORP.