Seller notes

O2 Oxygen Sensor Upstream & Downstream For Toyota Tacoma Lexus Sienna 2344260Features: Oxygen Sensor Upstream :The upstream oxygen sensor is installed behind the exhaust manifold and in front of the catalytic converter. It is mainly used to detect the oxygen content in the exhaust gas after the combustion of the engine mixture and feed the data back to the ECU (engine control computer).Oxygen Sensor Downstream :The downstream oxygen sensor is installed behind the three-way catalytic converter, w...

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