Bosch Oxygen Sensor Heated Planar Design

The Bosch heated planar oxygen sensor (also called an O2 sensor, lambda sensor or air-fuel ratio sensor) measures the oxygen content in the exhaust stream. It sends that data to the engine control unit so the ECU can keep fuel delivery and emissions control accurate. Bosch pioneered the oxygen sensor and supplies it as original equipment to many automakers.

Key Features:

• Planar sensing element: The layered ceramic element is thinner than a traditional thimble-style design. It reaches operating temperature quickly and responds fast.
• Integrated heater: The heater brings the sensor to operating temperature soon after a cold start. Closed-loop fuel control can then begin sooner, which helps reduce cold-start emissions.
• Precise signal: A fast, stable signal helps the ECU maintain the correct air-fuel ratio. This supports good fuel economy, smooth drivability and efficient catalytic converter operation.
• OE-quality construction: Durable materials and a sealed design resist heat, vibration and exhaust contaminants.
• Direct-fit design: Many sensors come with a connector and wiring harness made for the application. This makes installation simpler.

A worn or failing oxygen sensor can cause a check engine light, poor fuel economy, rough idle and higher emissions. Replacing it with a quality Bosch planar sensor helps restore proper engine management and emissions performance. Select the correct child item for your application from the options on this page.