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Front and Rear up Stream Oxygen Sensor (2 PCS)
This product provides a complete solution for your vehicle's oxygen sensor needs. The upstream sensor (typically located before the catalytic converter) measures the oxygen content in the exhaust gas, providing critical feedback to the engine's computer to ensure the air-fuel mixture is perfectly balanced. This is vital for engine performance and fuel economy. The downstream sensor (located after the catalytic converter) monitors its efficiency, ensuring it is properly reducing harmful emissions. Replacing both sensors at the same time is a best practice, as they often wear out at a similar rate. A faulty oxygen sensor can cause a Check Engine light, a decrease in fuel efficiency, or a rough engine idle. This set ensures a comprehensive repair, restoring your vehicle's emissions and fuel management systems to proper working order.
