Oxygen O2 Sensor 234-4078/13138 Downstream For Jeep Wrangler Cherokee TJ Grand Cherokee COMPATIBLE WITH OEM: 13138, 234-4078 Length (Sensor to Lead): 400 mm (15.74 inch). Wires: 4 New O2 Oxygen Sensor Upstream or Downstream 13138 234-4078 Replacement 13138 234-4078 O2 Oxygen Sensor Upstream or Downstream for Chrysler Dodge Jeep Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase. Warranty: 1 year unlimited miles.