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The NGK direct-fit oxygen sensor for 1997–2000 Infiniti QX4 supplies OE-style closed-loop feedback to the engine control unit to support correct air–fuel mixture, steady engine performance, improved fuel economy and reduced emissions. Leveraging NTK ceramic technology and a three-stage contaminant-resistant overcoat, this direct-fit replacement improves resistance to element poisoning and is developed alongside OEM manufacturers for reliable fit and function.
NGK Infiniti QX4 2000-1997 Direct Fit Oxygen Sensor
