Knock sensors are placed in different positions on the engine block or cylinder. The knock sensor is a sonic sensor that monitors shockwaves in the engine. It senses when the engine pings. Replacing your old or broken car knock sensor. This product fits for Honda Accord 2008-2013, Honda Spirior 2010-2013 This is a non-OEM product. Accessory only! Note: Before purchase this parts, please check the compatibility information or call your local dealer to verify the correct OEM part number. Disconnect the battery while you do the replacement. Package Include: 1 x Knock Sensor