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Oxygen Sensor 1/1 Upstream - 2.0/2.4L

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Locating Oxygen Sensor (1/1 Upstream & 1/2 Downstream)
GC0021612Courtesy of CHRYSLER LLC
1 - DOWN STREAM O2 SENSOR
2 - UP STREAM O2 SENSOR
  1. Remove the air cleaner lid and makeup air hose.
  2. Remove the negative battery cable.
  3. Disconnect electrical connector from sensor.
  4. Remove sensor using an oxygen sensor special tool C-4907.