SAFE & SECURE SHOPPING. DEF Doser Urea Pump 5506956 4388105 5506956RX Fits For Cummins Diesel Engine New. It’s my honor to serve you! We hope you can choose our products, and we will provide you with the highest quality products and the best after-sales service. 1Pc DEF Doser Urea Pump. Please make sure the part numbers matches the part you are replacing. Please be very careful to check our photos, make sure the photo showed is same as you wanted. We guarantee against any defective products. We will work on resolving your particular case ASAP. Return orders will be provided to the original purchaser only. It will not renew once a replacement has been issued. We strive to satisfy every customer. We will do our best to solve your problem. We will do everything we can to give you a satisfying solution. We do our best to resolve any issue. Leaving negative feedbacks and low ratings doesn’t get things solved. So please talk with us and we will not let you down. If you are satisfied with the product you received, please feel free to leave us positive (+) feedback.