A27678XUpstream and Downstream Oxygen O2 Sensor 1 and Sensor 2, 234-4076, 234-4078 For Jeep Cherokee Grand Cherokee Wrangler 4.0L

Key features

• Interchange Part No.:234-4078 13138 for downstream position; 234-4076 upstream position
• One Year Unlimited Warranty. Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing.
• Lambda sensor can improve engine efficiency performance and fuel economy, reduce CO2 and other harmful emissions, extend expensive Catalytic Converter life.
• The metal shroud doesnot look as shiny as other Oxygen Sensors. Because it is made of SUS310 high temperature resistant material. And every single item is heated at 1562℉. The high temperature also makes it stands wear and tear.
• The metal shroud doesnot look as shiny as other Oxygen Sensors. Because it is made of SUS310 high temperature resistant material. And every single item is heated at 1562℉. The high temperature also mskes it stands wear and tear.