Bosch Cummins DEF Urea Dosing Module 0444043051 5305254 / A043C088 (DEF Pump / Denoxtronic)Cummins Genuine Bosch UREA (Exhaust Fluid) Dosing Module OEM # 5305254 A043C088 This module may also be referred to as a def pump, delivery module, urea injection pump, diesel exhaust fluid pump, dnox supply module, or denoxtronic supply module. Cut out the middle man and save money by buying direct from the Bosch distributor. Genuine Bosch DEF dosing module for Cummins engines. Maintains accurate urea injection for SCR emissions compliance in heavy