Mopar Performance Oxygen Sensor After Catalyst

The Mopar Performance Oxygen Sensor After Catalyst is a downstream (post-catalytic converter) O2 sensor. It monitors the oxygen content of the exhaust gas after it passes through the catalytic converter. The sensor sends this data to the engine control module (ECM/PCM). The ECM uses it to check catalyst efficiency and to support emissions diagnostics. It is also sold as a rear oxygen sensor, downstream O2 sensor, or post-cat oxygen sensor.

Key Features:

• Downstream position, installed after the catalytic converter
• Gives the engine computer accurate exhaust oxygen readings for catalyst monitoring
• Helps maintain proper emissions system operation and prevent check engine light faults
• Backed by the Mopar Performance brand, the performance parts arm of Mopar, the Chrysler, Dodge, Jeep and Ram parts and service organization
• Built for dependable, long-term use in the high-heat exhaust environment

A worn or failed after-catalyst oxygen sensor can trigger catalyst efficiency codes and a check engine light. Replacing it restores accurate exhaust feedback to the engine computer. Select the child item that matches your application to get the correct connector and sensor length.