4388105, 5506956, 2115624, 2208766, 5506956RX. A06X234, 2208766PE, 5506956CUM, 2115624PE, A052Y. Will fit Following Models. For Cummins 5506956, 4388105 DEF Doser Pump. Durability & Reliability: Our products is designed to meet the highest standards of durability, ensuring long-lasting performance. Enhanced Performance: Enjoy a smoother, more comfortable ride with our high-quality equipped with components. Our goal is to satisfy every customer. Negative ratings won’t fix issues, but communication will.