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Air/Fuel Ratio Sensors utilize a sophisticated sensing element that enables them to produce a precise output in proportion to the Air/Fuel Ratio. AFR sensors provide the ECU with an Exact AFR response, resulting in better performance, lower emissions, and increased gas mileage. All NGK/NTK oxygen sensors have OEM specified connectors and attaching hardware for easy installation. Dual-coated platinum element increases longevity and ensures the quickest response time.