We inspect every part before we put for sale. Please check and do research before purchasing a part for fitment. All of our parts are from working engines. All of our parts have a 30 day warranty. These parts are inspected carefully before shipment. If you receive a defective part, please feel free to contact us and we can send you a replacement or a refund. We do not sell parts for testing. We desire to give you the best quality used parts and maintain a 5 star rating. If any inconveniences please feel free to contact us and not eBay.