21534115 | Genuine OEM Volvo / Mack AHI Dosing Module

The Genuine Volvo / Mack AHI Dosing Module, part number 21534115, is a component of the diesel exhaust aftertreatment system. It supports hydrocarbon dosing used during Diesel Particulate Filter (DPF) regeneration, helping the system manage accumulated soot. This module is listed for compatible 12V Volvo and Mack heavy-duty trucks. <Cite refs={["turn243958search0","turn243958search1"]}/>

PRODUCT INFORMATION

• Part Number: 21534115

• Brand: Volvo / Mack

• Product Name: AHI Dosing Module

• Component: Aftertreatment Hydrocarbon Injector Driver Module

• System: Diesel Exhaust Aftertreatment

• Voltage: 12V

• Engine Applications: Selected Volvo D11, D13, D16 and Mack MP7, MP8 applications

• Condition: Verify the actual item's condition before listing

APPLICATIONS

Part number 21534115 is listed for selected Volvo and Mack trucks equipped with compatible aftertreatment systems. Applications may include Volvo VNL, VNM, VHD and VAH models, as well as selected Mack Pinnacle, Granite, Anthem, CHU, CXU, GU and MRU models.

Vehicle compatibility varies by model year, engine, and emissions configuration. Verify the VIN, engine serial number, and existing part number before purchase. <Cite refs={["turn243958search0","turn243958search6"]}/>

FUNCTION

The AHI (Aftertreatment Hydrocarbon Injector) dosing module controls the hydrocarbon injection process used to support DPF regeneration. Proper operation helps the aftertreatment system burn accumulated soot and maintain exhaust filtration performance.

COMMON SIGNS OF AHI DOSING MODULE FAILURE

A worn or failing AHI dosing module may be associated with symptoms such as:

• DPF regeneration failures or interruptions

• Aftertreatment warning lights

• Engine or emissions-related diagnostic trouble codes

• Reduced engine performance or an emissions-related derate

• Abnormal hydrocarbon dosing operation

• Repeated soot accumulation or DPF restriction warnings

These symptoms can also result from injector, wiring, sensor, fuel supply, or other aftertreatment problems. Diagnosis is recommended before replacing the module.

WHY REPLACE AN AHI DOSING MODULE?

Replacing a confirmed faulty AHI dosing module helps restore proper control of the hydrocarbon dosing process and supports normal DPF regeneration. Correct diagnosis is important because related aftertreatment faults can produce similar symptoms.

FITMENT INFORMATION

Before ordering part 21534115, verify:

• OEM part number and any superseding number

• Vehicle VIN and model year

• Engine model and serial number

• 12V electrical system

• Connector, mounting, and dosing system configuration

Other numbers, including 21870667, 22452551, and 23185531, are listed as cross-references by some suppliers. These numbers should not be treated as guaranteed interchangeable without confirming the specific application. <Cite refs={["turn243958search1","turn243958search4"]}/>

GENUINE VOLVO / MACK PART

This listing identifies the component as a Volvo / Mack AHI Dosing Module with part number 21534115. Confirm the product label, manufacturer markings, packaging, and actual condition before describing it as new or genuine OEM inventory.