Mopar Performance Oxygen Sensor Downstream

The Mopar Performance downstream oxygen sensor, also called a post-catalyst O2 sensor or rear O2 sensor, is a genuine Mopar replacement part. It mounts after the catalytic converter in the exhaust system. It measures the oxygen left in the exhaust gas after the catalyst, so the engine computer can judge how well the converter is working and help keep emissions within limits.

Key Features:

• Genuine Mopar part built to OEM specifications
• Monitors catalytic converter efficiency downstream of the catalyst
• Supports emissions compliance, fuel economy and drivability
• Direct-fit design for a bolt-on installation without modification
• Helps clear or prevent check engine lights caused by a failing sensor

A worn or contaminated downstream oxygen sensor can cause poor fuel economy, a check engine light and failed emissions tests. Replacing it with a Mopar sensor restores accurate exhaust feedback to the engine management system. Select the child item that matches your application and sensor position.