Bosch Premium Wideband Air/Fuel Ratio Sensor

The Bosch Premium Wideband Air/Fuel Ratio Sensor is a wideband oxygen sensor (also called an A/F sensor or lambda sensor). It measures the oxygen content in the exhaust stream so the engine control unit can keep fuel delivery accurate. Wideband sensors report a wide, continuous range of air/fuel ratios. Conventional narrowband sensors only switch between rich and lean. This lets the engine management system make faster, finer fueling adjustments.

Key Features:

• Wideband planar sensing element for accurate, continuous air/fuel ratio measurement
• Integrated heater brings the sensor to operating temperature quickly, which supports closed-loop fuel control sooner after a cold start
• Designed to help maintain proper combustion, fuel economy, and emissions performance
• Rugged housing and wiring built for the heat, vibration, and contamination of exhaust environments
• Made by Bosch, which pioneered the automotive oxygen sensor and is a long-time original equipment supplier to automakers
• Application-specific connectors and harness designs in the product line for direct-fit installation

A worn or failing air/fuel ratio sensor can cause a check engine light, poor fuel economy, rough idle, hesitation, and higher emissions. Replacing it with a quality wideband sensor helps restore proper engine management and efficient operation. Choose the specific part number that matches your application from the options listed on this page.