Please send your VIN If you are not sure the product fit your vehicle or not. Original specifications, Stable performance, high reliability. Please do not open the return request casually. We assure you that we will definitely solve the problem you are currently facing. We will expedite the resolution of your issue during working hours. Thank you for your support and understanding. For Cummins 5506956, 4388105 DEF Doser Pump. Note: Please compare your item carefully with photo and OE Number to avoid mistake!! 4388105, 5506956, 2115624, 2208766, 5506956RX. A06X234, 2208766PE, 5506956CUM, 2115624PE, A052Y. Your physical address is required. Please allow us have more time to handle your case, and please trust us that we will provide the perfect solution for you. We committed to provide good quality products to all our customers. M PDT (Monday to Friday), without Return Authorization Number, we couldn’t identified your return. We aim to provide the high quality auto parts and accessories, but some rare cases happened. 1 If the item fails after installation. If instructions are not available the work should be performed by a licensed mechanic. 2 If we send you the wrong parts. You may pay a deposit and have a replacement item sent in advance. We provide high-quality products, preferential prices, equipped with high-quality customer service to provide pre-sales and after-sales consultation, please rest assured to choose our products, thank you. We are here to help with any questions or problems you may have. During the working hours, we will reply all your messages promptly. We are off on the weekend, messaged we got on the weekend will be replied on coming Monday. Please do NOT leave negative or neutral feedback without asking for help. We aim to provide Top Level Customer Service, we will try our best to solve the problem for you.