Seller notes

Feature: The front oxygen sensor is to detect the air-fuel ratio of the engine in different working conditions. The rear oxygen sensor is mainly to detect whether the three-way catalytic converter works normally. 100% test before shipment. The reduction of harmful emissions. The increasing of fuel economy. The improvement of engine performance. Prevent premature failure of the catalytic converter Specification: OE number: 234-5059 234-4939 Replacement: Direct Plug-In Replacement Condition: 100% ...

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