Bosch 0444021030 Diesel Exhaust Fluid (DEF) Module

Bosch OE DEF Metering Module

Bosch 0444021030 is an Actual OE Urea Metering Module for diesel exhaust fluid dosing systems. It is built for diesel emission control service on select Chevrolet Express, Silverado, GMC Savana, and Sierra HD applications from 2010-2015.

Bosch’s Actual OE Urea Metering Module line focuses on original-equipment-style fit and function for diesel fuel and emission systems. For buyers searching for a Bosch DEF module, Bosch 0444021030, or an OE urea metering module for Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD, this part matches the listed vehicle applications below.

• Actual OE Urea Metering Module (New) for diesel exhaust fluid metering service
• Fits 2010-2015 Chevrolet Express 2500, N/A
• Fits 2010-2015 Chevrolet Express 3500, N/A
• Fits 2010-2015 Chevrolet Silverado 2500 HD, N/A
• Fits 2010-2015 Chevrolet Silverado 3500 HD, N/A
• Fits 2010-2015 GMC Savana 2500, N/A
• Fits 2010-2015 GMC Savana 3500, N/A
• Fits 2010-2015 GMC Sierra 2500 HD, N/A
• Fits 2010-2015 GMC Sierra 3500 HD, N/A

Emission Control Application Details

This Bosch DEF module is used in diesel exhaust fluid dosing systems to meter urea solution into the aftertreatment system. It is a direct-fit emission control component for the listed Chevrolet Express, Chevrolet Silverado HD, GMC Savana, and GMC Sierra HD diesel applications. If you are replacing Bosch 0444021030 on a 2010-2015 Chevrolet Silverado 3500 HD or a 2010-2015 GMC Sierra 2500 HD, verify the part number and vehicle configuration against the original unit before installation.

Common Issues Addressed

• DEF dosing faults related to urea metering performance
• Emission system warning lights tied to metering module failure
• Incorrect DEF delivery in diesel aftertreatment systems
• Replacement needs for a damaged or non-functioning OE-style metering module

Installation Notes

Confirm the part number Bosch 0444021030 and match it to the original module before installation. Inspect the DEF lines, connectors, and surrounding emission components for contamination, crystallization, or damage so the new module is not affected by an existing system fault. Follow the vehicle service procedure for the specific Chevrolet or GMC diesel application.

Quality Assurance

Bosch supplies original-equipment diesel fuel system technology for passenger vehicles, SUVs, vans, and trucks. This Actual OE Urea Metering Module is built to align with OE-level application requirements for the listed diesel emission control platforms.