Dorman 904-5520 Hydrocarbon Injector Driver Module
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Dorman

Dorman 904-5520 Hydrocarbon Injector Driver Module

Brand Dorman 904-5520
Module Height 115 mm
Module Housing Material Aluminum
Module Length 105 mm
Module Width 148 mm
Package Contents 1 def module
Fits —

Direct replacement. Restores functionality to the aftertreatment system.

Aluminum housing. Helps protect the module with a durable metal enclosure.

Injector driver module. A replacement part for emission system control.

Cross-references 21534115 for the same application. See all 1.

$382.95Free shipping
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Dorman 904-5520 Hydrocarbon Injector Driver Module

The Dorman 904-5520 hydrocarbon injector driver module is a direct replacement for a fouled or sticking injector module in the vehicle aftertreatment system. It restores control of hydrocarbon injection for diesel emission management and is built with an aluminum housing for durable service in demanding underbody conditions.

Key Features

  • Direct replacement hydrocarbon injector driver module for emission system repair
  • Aluminum module housing for strength and heat resistance
  • Dimensions: 115 mm height, 105 mm length, 148 mm width
  • Fits applications that use OE part number 21534115
  • Part number 904-5520 for streamlined lookup and ordering

Detailed Description

This hydrocarbon injector driver module is used in the aftertreatment system to help restore proper injector operation when the original unit is fouled or sticking. For diesel vehicles that rely on precise emission control, a failing module can affect dosing performance and system operation. Dorman 904-5520 is a direct replacement built to match the original function and packaging requirements, including its aluminum housing and compact module dimensions. It is a practical repair choice for diesel emission service on vehicles such as Chevrolet Silverado and GMC Sierra applications that use this OE-style configuration.

This part cross-references OE part number 21534115 for the same application. The Dorman 904-5520 designation also helps simplify identification when sourcing a hydrocarbon injector driver module for Chevrolet Silverado and GMC Sierra diesel aftertreatment repairs.

What It Helps Fix

  • Hydrocarbon injector module fouling
  • Sticking injector driver operation
  • Aftertreatment system dosing faults
  • Emission control performance issues tied to the injector module
  • Diesel exhaust aftertreatment service concerns

Installation Notes and Tips

Verify OE part number 21534115 and confirm module dimensions before installation. Inspect the surrounding aftertreatment components, connectors, and harness condition during service so the replacement module can operate correctly. For Chevrolet Silverado and GMC Sierra diesel applications, confirm the vehicle’s emission system configuration matches the original module layout before final installation.

Quality Assurance

Dorman manufactures replacement components to restore original equipment function and fit. This hydrocarbon injector driver module is built as a direct replacement for emission system repair and is intended to meet the needs of OE-style service on the specified application.

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
21534115