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NGK OZA544-R1 / OZA544R1 / 1857 Zirconia Type Lambda Sensor Genuine NGK ComponentLambda sensors are oxygen detecting devices that are fitted into the exhaust system of increasingly more internal combustion engines. They are a vital part of the emission reduction technology and also help to ensure that the engine is running at its optimum performance. NGK Spark Plug Co Ltd was a pioneer in this field and is now a world leader in the development and production of Lambda sensors under the NTK brand name.The zirconium dioxide lambda sensor is distinguished by the following characteristics: Fast operational readiness Temperature resistance Not sensitive to hydraulic shock Resistant to contamination High level of reliability These sensors are used as a regulating and as a diagnostic sensor, depending on the vehicle.BOX DIMENSIONSHeight (mm): 130Width (mm): 130Length (mm): 40LAMBDA SENSOR SPECS:Type: OxygenSub Type :Zirconia Type Thread :18mm Sensor Connector & Lead Length:R1If you are unsure as to whether this is the correct part for your vehicle, please don't hesitate to contact us. Alternatively please use the cross reference table above.