Bosch 044404229X DEF Supply Module | 12V with Check Valve | Cummins ISB / ISC / ISL / ISX | Replaces 4387657 / 0444042134 | New

Genuine Bosch Denoxtronic 2.2 DEF (diesel exhaust fluid) supply module, part number 0 444 042 29X, 12-volt with check valve, for Cummins ISB, ISC, ISL, and ISX engines with SCR aftertreatment. It replaces Cummins 4387657 and Bosch 0444042134. The supply module, also called the DEF pump or DNOX supply module, pumps DEF from the tank and pressurizes it for the dosing module, which injects it into the exhaust ahead of the SCR catalyst. Sold new.

Key Features:

• Genuine Bosch Denoxtronic 2.2 DEF supply module (DEF pump)
• 12-volt, with check valve
• For Cummins ISB, ISC, ISL, and ISX engines with SCR
• Replaces Cummins 4387657 and Bosch 0444042134

Specifications:

• Part number: 044404229X (0 444 042 29X)
• Replaces: Bosch 0444042134; Cummins 4387657, 4387657NX, 4387657RX
• Brand: Bosch
• Condition: New
• Component type: DEF supply module (Denoxtronic 2.2)
• Voltage: 12V
• Check valve: Yes
• Engines: Cummins ISB, ISC, ISL, ISX (SCR-equipped)

Compatibility / Fitment:

Fits Cummins ISB, ISC, ISL, and ISX engines with Bosch Denoxtronic 2.2 SCR systems using the 12V supply module with check valve, Cummins 4387657 or Bosch 0444042134. Match the Cummins or Bosch number on your existing module before ordering.

Hard fitment gate — voltage and check valve: Cummins used four versions of this supply module, and they aren't interchangeable:

• 12V with check valve: this module, 044404229X / Cummins 4387657
• 12V without check valve: a different module
• 24V without check valve: a different module
• 24V with check valve: a different module

Check the label on your existing module before ordering.

Installation note: Replace the supply module filter when installing a new module, and use fresh DEF. Keep the DEF lines and connectors clean, since contamination damages the pump and doser. After installation, clear fault codes and run the aftertreatment priming or self-test procedure with the Cummins service tool.

Common interchanges: 044404229X, 0444042134, 4387657, 4387657NX, 4387657RX

Conclusion:

A genuine Bosch 044404229X Denoxtronic 2.2 DEF supply module, 12V with check valve, for Cummins ISB, ISC, ISL, and ISX engines, replacing Cummins 4387657 and Bosch 0444042134. Match the voltage and check-valve version before ordering.