Bosch Oxygen Sensor Heated Universal Pre-Cat

The Bosch heated universal pre-cat oxygen sensor (also called an O2 sensor or air/fuel ratio sensor) measures the oxygen content in the exhaust stream upstream of the catalytic converter. It sends this signal to the engine control unit, which uses it to fine-tune the fuel mixture for efficient combustion, lower emissions, and good fuel economy.

Key Features:

• Universal design that is trimmed and spliced into the vehicle's existing wiring connector, so it is not limited to a single application
• Built-in heating element brings the sensor up to operating temperature quickly, so the engine can enter closed-loop control sooner after a cold start
• Pre-cat (upstream) sensor for monitoring exhaust gases before the catalytic converter
• Available in different wire configurations to suit the requirements of the vehicle
• Made by Bosch, an original equipment supplier of oxygen sensors to many automakers

A worn or failing oxygen sensor can cause poor fuel economy, rough running, a check engine light, and higher emissions. Replacing it restores accurate exhaust feedback and helps the engine run as designed. Select the variant with the wire configuration that matches your vehicle's sensor connector.