Type: Heating TypeSensor Type: PiezoelectricPackage includes: 1 * Oxygen Sensor1. Please check the OEM number before purchasing.2. Please allow 1-2cm error due to manual measurement. Thank you for yourunderstand.3. The monitor is not calibrated the same, the color of the item shown in the photo may beThe display is slightly different from the actual item. Please refer to the actual product.Must know before buying:A: The only way to know if the O2 sensor is working is to check itsChanges in the air/fuel mixture, by voltage measurement or waveform simulation.Use a 10 megohm digital voltmeter. Connect the red probe of the voltmeter to the signal wire of the sensor and the black probe to the engine ground. (Use the back probe method, don't pierce the wires.)sensor, 2 or 3 minutes after starting the engine.Welcome to my shop, there are many quality products here, before placing an order, please make sure our products are suitable for you, and finally wish you a happy shopping.