Bosch Oxygen Sensor Heated Post-Catalytic Converter

The Bosch heated oxygen sensor (also called an O2 sensor or lambda sensor) is designed for the post-catalytic converter, or downstream, position. It monitors the oxygen content of the exhaust gas after the catalytic converter. The engine control unit uses this signal to check catalytic converter efficiency and to help keep emissions within limits.

Key Features:

• Integrated heating element brings the sensor to operating temperature quickly, so it can give accurate readings soon after a cold start
• Downstream placement lets the engine management system monitor catalytic converter performance
• Bosch is an original equipment supplier of oxygen sensors, and the sensors are built to meet OE-level specifications
• Sealed construction and a durable sensing element resist heat, vibration and exhaust contaminants
• Pre-attached wiring harness and connector, specific to each application, for a straightforward installation

A worn or failing post-catalytic converter oxygen sensor can trigger a check engine light, cause catalyst efficiency fault codes and hurt fuel economy. Replacing it with a quality Bosch sensor helps restore proper emissions monitoring and engine management performance. Choose the correct part number for your application from the options listed on this page.