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An automotive oxygen sensor (O2 sensor) detects oxygen content in exhaust gases, feeding back to the ECU to adjust the air-fuel ratio to the ideal 14.7:1. This optimizes fuel economy and ensures emission compliance. Front O2 sensors (before the catalytic converter) enable closed-loop air-fuel control, while rear sensors (after) monitor converter efficiency. Our O2 sensors for Japanese, American, German, French, and Chinese vehicles ensure precise monitoring for optimal engine performance. Contact us for specifications.