Seller notes

1Pc Oxygen Sensor Upstream For 4.0L NISSAN FRONTIER PATHFINDER XTERRA 2011-12 Package Included 1 PCS Oxygen Sensors  Features: *Function 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 premat...

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