Restore precise fuel delivery, smooth idle quality, and dependable drivability on your 1988-1993 Dodge 5.9L Cummins with this genuine Bosch fuel injector. The 5.9L Cummins used in first-generation Dodge diesel pickups is a mechanically injected engine that relies on Bosch pencil-style nozzle and holder assemblies to deliver fuel into each cylinder. Over time, worn, coked, or leaking injectors can cause rough idle, excessive black smoke, misfires, reduced power, hard starting, and fuel knock. This direct-replacement injector helps restore proper spray pattern, opening pressure, and combustion quality when the original injector has been verified as worn or failing. Note on Fitment: Always verify your vehicle's exact build date, VIN, engine application, and existing part number before ordering.