Bosch Oxygen Sensor Pre-Catalytic Converter

The Bosch pre-catalytic converter oxygen sensor, also called an upstream O2 sensor, air-fuel ratio sensor or lambda sensor, monitors the oxygen content in the exhaust stream ahead of the catalytic converter. It sends real-time data to the engine control unit (ECU). The ECU uses that data to fine-tune fuel delivery for efficient combustion, lower emissions and steady engine performance.

Key Features:

• Installs upstream of the catalytic converter to measure exhaust oxygen content
• Helps the ECU maintain the correct air-fuel mixture for fuel economy and drivability
• Supports emissions control and helps the vehicle's catalytic converter work efficiently
• Built with a durable sensing element and a protective housing designed for exhaust heat and vibration
• Integrated heater element for fast warm-up and accurate readings
• Engineered to meet or exceed original equipment specifications

Bosch invented the automotive lambda sensor and is a leading original equipment supplier to automakers worldwide. A failing oxygen sensor can cause a check engine light, poor fuel economy, rough idle and higher emissions. Replacing it with a quality sensor helps restore proper engine management. Select the child item that matches your application.