4388105, 5506956, 2115624, 2208766, 5506956RX. A06X234, 2208766PE, 5506956CUM, 2115624PE, A052Y. Will fit Following Models. For Cummins 5506956, 4388105 DEF Doser Pump. Note: Please compare your item carefully with photo and OE Number to avoid mistake!! If you need more information, or need more quantity, or have other questions. We keep our promise to provide you with the best solution within 24 hours. Thank you very much!