Restore fuel delivery, smooth idle quality, and dependable performance on your 2019-2021 Ram 3500 6.7L Cummins High Output with this new genuine Bosch common rail fuel injector. This direct-replacement injector helps correct injector-related concerns such as hard starting, rough idle, excessive smoke, poor throttle response, balance rate issues, reduced power, and drivability concerns under load. Bosch: 0445124039, 0 445 124 039 Installation Note: Follow proper fuel system cleanliness procedures and replace required seals or hardware per service procedure. Fitment Note: Verify build date, VIN, engine output rating, cylinder position, and existing injector part number before ordering.