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High-quality downstream oxygen sensor, designed to measure the oxygen level in exhaust gases after passing through the catalytic converter. This part is an essential component of the engine management system and emission control procedures, as it sends accurate readings to the electronic control unit (ECU) to monitor catalytic converter efficiency and precisely adjust the fuel mixture, ensuring optimal engine performance, reduced fuel consumption, and lower harmful emissions. The sensor is manufactured from high-quality ceramic and metal materials resistant to extreme heat and vibrations to ensure accurate readings, quick response, and long life. Replacing the damaged downstream oxygen sensor (which causes the check engine light, weak acceleration, or increased fuel consumption) helps restore engine efficiency, improve fuel economy, and ensure passing emissions tests. Storage number 39210-2G205-M. **Specifications:** - Part: Downstream oxygen sensor. - Storage code (SKU): 39210-2G205-M. Downstream oxygen sensor – accurate measurement and perfect performance for your car's engine.