Common Problems and Information for Customers. Common Problems for Customers. Is this accessory new? A: We are manufacturers, so each product can be guaranteed to be a new product assembled in person. How can I be sure of the correct injector for my vehicle? A: There is the model number on the injector body, please check or take a photo and send it to us. What if I can’t use it? A: If you can’t install it successfully, there is no reason to return the replacement. In special cases, if we encounter production problems, I will inform you in advance. Please make sure the OE numbers match the part you are replacing. Please be very careful to check our photos, and make sure the photo shown is the same as what you wanted. This part was tested and passed for working well. Clean all engine fuel tanks and fuel hoses. Please install carefully to ensure the sealing ring is not damaged. Please check with your car repair shop about the above information. Full name, correct telephone number, and detailed physical address (home or office address) are required. BOX/APO/FPO addresses are not accepted. Customer service is the most important to us. We are glad to have more opportunities to serve you.