Wideband Air Fuel Ratio Sensor (27021) by NTK. 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 ...Wideband Air Fuel Ratio Sensor (27021) by NTK.
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 are platinum coated for durability and are individually tested to guarantee quality.