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Upstream O2 Sensor

NOTE: The left side O2 sensor is shown in illustration. The right side is similar.
  1. Disconnect the negative battery cable.
  2. Remove the air cleaner housing. See 3.2L V6 article.
  3. Disconnect the O2 sensor harness connector.
  4. Remove the O2 sensor (1).
    Fig 1: Removing Upstream O2 Sensor
    G01860796Courtesy of DAIMLERCHRYSLER CORP.