Bosch Oxygen Sensor Heated Before Catalytic Converter

The Bosch heated oxygen sensor (also called an O2 sensor or upstream air-fuel ratio sensor) is installed before the catalytic converter. It measures the oxygen content in the exhaust stream and sends that data to the engine control unit (ECU). The ECU uses the signal to fine-tune the air-fuel mixture for efficient combustion, lower emissions and good fuel economy.

Key Features:

• Built-in heating element brings the sensor to operating temperature quickly, so closed-loop fuel control starts sooner after a cold start
• Designed to meet OE-level performance and accuracy requirements
• Pre-sensor placement gives the ECU the primary feedback it needs to adjust fuel delivery
• Durable construction built for the heat, vibration and contaminants of the exhaust system
• Plug-and-play connector and pre-wired harness on most applications for straightforward installation

A worn or failing upstream oxygen sensor can cause poor fuel economy, rough idle, hesitation, increased emissions and a check engine light. Replacing it with a quality Bosch sensor helps restore proper engine management and emissions control. Bosch is a leading supplier of original equipment sensors and has decades of experience in engine management technology.