Bosch Oxygen Sensor Heated After Catalytic Converter

The Bosch heated oxygen sensor (also called an O2 sensor or lambda sensor) is installed after the catalytic converter, in the downstream position. It monitors the oxygen content in the exhaust gas leaving the converter. The engine control unit uses this signal to check catalytic converter efficiency and to support emissions control.

Key Features:

• Downstream (post-catalyst) position for monitoring catalytic converter performance
• Integrated heating element brings the sensor to operating temperature quickly, so it works sooner after a cold start
• Bosch is a leading OE supplier of oxygen sensors, and Bosch designs these sensors to meet original equipment performance expectations
• Precise signal output supports proper air-fuel management, fuel economy and emissions compliance
• Built to withstand the high heat, vibration and contaminants of an exhaust system
• Many applications include a pre-wired connector and plug, which simplifies installation

A failing downstream oxygen sensor can trigger the check engine light and catalyst efficiency codes. It can also reduce fuel economy and cause failed emissions tests. Replacing it with a quality Bosch sensor helps restore proper engine management and emissions system performance. Select the child item that matches your application.