Specifications:Replacement Oxygen SensorDirectly Replacement PartWires/Length: Can contact us for details or check the drawingMeasurement Method of Wires and Sensor Length:Sensor Replacement Time:Warranty:1 Year Limited WarrantyIncluded:100% Brand New Oxygen Sensor X4pcs (As Shown in the Picture)Compatible Vehicle:Check the Compatibility Chart or Contact Us for DetailsContact Us:Any Question or Problem If there is any question or problemOxygen Sensor Location:How to know if the O2 sensor is good or not Check Engine Light Comes OnFuel Economy Decreases Your Catalytic Converter Fails UnexpectedlyExhaust Emissions Reach Undesirable Levels.How to Install the Oxygen Sensor Step 1: Some sensors are equipped with a heat shield that needs to be removed before removing the sensor, this is done by removing all the mounting bolts. Step 2 – Using a regular socket will minimize potential damage to the sensor housing and threads, this method helps avoid stripping the old sensor when removing it. Step 3 – Next locate and disconnect the wiring connector, this step should be done before removing the sensor if the wiring is still connected. Step 4 – It is important that the wiring harness connectors are exactly the same, each sensor is unique to its position and is located in the system according to the connector configuration. (Note: Some replacement sensors have a universal electrical connector that must be configured to accommodate the old sensor wiring.) Step 5 – Use a small wire brush to clean the threaded hole to ensure a proper seal for the new sensor. Carefully install the new oxygen sensor by hand, making sure the wiring and connector are not kinked. Step 6 – Gently tighten the sensor, making sure the wiring is not damaged, these sensors need to be tight enough to avoid leaks. Step 7 – Once the sensor is tightened, reinstall any heat shields or spacers that had to be removed. Step 8 – Once the heat shield has been reinstalled, install the connector on its holder and reconnect the connector to the wiring harness. If the vehicle has diagnostic trouble codes, they will need to be cleared. Things to Know Before Buying: The following information is for informational purposes only and is a recommendation. We strive to make it as accurate as possible. If the Check Engine Light comes on or an OBDII trouble code appears after installation, test the sensor with a voltmeter as listed below. If the sensor is good, further diagnostics are required. There are many different codes for specific functional faults that are NOT necessarily specific to the sensor. Find out what the code means before leaving any feedback. Items that have been installed, modified, or contaminated are not returnable. 1. The manufacturer’s warranty ONLY covers the faulty sensor after testing with a voltmeter. 2. A 20% restocking fee is required if the customer purchased the wrong parts due to not paying attention to the information on the package and requests a refund. The price, quality and functionality of the O2 sensor are fully covered by our warranty and return policy. However, any labor costs, dealer shop charges or damage due to improper installation are NOT covered.