This is the genuine Bosch 044404227G, a new 24 volt DEF supply module for Volvo trucks. Catalogs list it for the Volvo FH, FH16 and FM. The supply module is the DEF pump: it draws diesel exhaust fluid from the tank, builds pressure and feeds the dosing module at the exhaust. It replaces Volvo 21576178, 23753841, 21335892, 22390377, 85013590 and 85023552. It also replaces the earlier Bosch numbers 0444042011, 0444042012, 0444042016 and 044404227H.

A failing supply module shows up as low DEF pressure, a pump that will not prime or purge, DEF leaking from the housing, or SCR fault codes followed by a derate. Check the DEF filter, the heated lines and DEF quality first. This module is 24 volt, so it is not the part for a 12 volt truck. For 12 volt Volvo and Mack trucks with D11 and D13 engines, catalogs list a different module, Bosch 044404227E (Volvo 21577507, Mack 21577511). This is a replacement part for the factory system only.

Specifications

Fits / Applications

• Volvo trucks with a 24 V DEF system (FH, FH16 and FM)
• Volvo part numbers 21576178 and 23753841, also 21335892, 22390377, 85013590 and 85023552
• 24 V systems only. For 12 V Volvo and Mack trucks with D11 and D13 engines, catalogs list Bosch 044404227E instead.
• Replacement part for the factory SCR system only

Check the DEF filter, the line connectors and their seals when you change the module. Rinse spilled DEF off with water, since dried DEF crystals damage connectors. Prime the system and clear the SCR fault codes with a scan tool after fitting.

Part Numbers & Cross Reference

Bosch 044404227G  ·  Volvo 21576178  ·  Volvo 23753841  ·  Volvo 21335892  ·  Volvo 22390377  ·  Volvo 21335895  ·  Volvo 21335897  ·  Volvo 85013590  ·  Volvo 85023552  ·  Bosch earlier number 0444042012  ·  Bosch earlier number 0444042011  ·  Bosch earlier number 0444042016  ·  Bosch earlier number 044404227H  ·  Bosch exchange number 098644D211  ·  Bosch exchange number 098644D222  ·  Bosch exchange number 098644D223  ·  Bosch exchange number 098644D226

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

What trucks does the Bosch 044404227G fit?

Volvo trucks with a 24 volt Bosch DEF supply module that carries Volvo number 21576178 or 23753841. Catalogs list it for the Volvo FH, FH16 and FM. Call 530-668-0818 with your VIN and the number on the old module to confirm.

Is this module 12 volt or 24 volt?

It is a 24 volt module. Check your truck’s system voltage and the label on the old module before you order.

What numbers does the 044404227G replace?

Volvo 21576178, 23753841, 21335892, 22390377, 21335895, 21335897, 85013590 and 85023552, and Bosch 0444042011, 0444042012, 0444042016 and 044404227H.

Is it the same as Bosch 044404227E?

No. The 044404227G is the 24 volt module. The 044404227E is the 12 volt module that catalogs list for Volvo and Mack trucks with D11 and D13 engines (Volvo 21577507, Mack 21577511). The two carry different numbers, so order the one that matches your old module and your system voltage.

Related Parts

• Mack E7 E-Tech & ASET 12.0L Electronic Unit Pump (EUP) | Bosch 0986445011 Remanufactured (Mack 313GC5233M)
• Mack E7 ASET & E-Tech 12.0L Electronic Unit Pump (EUP) | Bosch 0986445008 Remanufactured (Mack 313GC5230M)
• Volvo D13 & Mack MP8 12.8L EPA14 E3.5 Unit Injector (Volvo 85020428) | Delphi EX631085 Remanufactured

Why Buy From Valley Fuel Injection

We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who test these units. We verify fitment against your engine serial, VIN or build date before anything ships, so the right part arrives the first time.