Volvo / Mack AHI Dosing Module | Volvo 23185531 / 22452551 / 21870667 | FleetRun FR-AFTR651


Same Day Shipping

Order The Truck Parts You Need Now and Pay Later With Our Financing Option Available

Order Now, Pay Later

Need Help With Parts?

(872) 240-4144

Hassle Free Returns

6 Month / 50,000 Mile Warranty

Part Number

  • FleetRun: FR-AFTR651

Cross Reference Part Number

  • Volvo: 23185531 / 22452551 / 21870667
  • Dorman: 904-5520


  • 1 - ECM Electrical Connector: 5 Pin Rectangular Connector w/ Locking Tab
  • 1 - Fuel Pressure Sensor Electrical Connector: 4 Pin Round Twist-Lock Connector
  • 1 - 1/4" Air Supply Connection
  • 1 - Fuel Supply Fitting
  • 1 - Fuel Delivery Fitting
  • 3 Mounting Bolt Holes
  • We highly recommend replacing your AHI Air Pressure Regulator AND Air Dryer Filter, if you're replacing your AHI Dosing Module due to failure, contaminated or too much air pressure is the main cause of failing AHI dosing modules

Please note: this is an aftermarket part, the use of other manufacturer's names, part numbers or trademarks is for informational purposes only.

Please verify OEM part numbers before purchasing, FleetRun assumes no liability related to product use and fitment.

Are you experiencing issues with your Volvo/Mack AHI Dosing Module? Don't wait for a breakdown on the road! Get your replacement AHI Dosing Module today from FleetRun FR-AFTR651. Our cross-reference part numbers include Volvo 23185531, 22452551, and 21870667, as well as Dorman 904-5520.

Our AHI Dosing Module includes the fuel pressure sensor, as well as 1/4" air supply connection, fuel supply, delivery fittings, and three mounting bolt holes. It also features a 5-pin rectangular ECM electrical connector with a locking tab and a 4-pin round twist-lock fuel pressure sensor electrical connector.

If you're replacing your AHI Dosing Module due to failure, it's important to replace the AHI Air Pressure Regulator and Air Dryer Filter as well. FleetRun FR-AFTR961 offers an AHI Air Pressure Regulator that is compatible with Volvo/Mack and FleetRun FR-AFTR879 offers an Aftertreatment Fuel Injector/7th Injector Kit that is compatible with Volvo.

Our AHI Dosing Module is made to meet or exceed OEM standards, ensuring quality and reliability. It's compatible with Volvo D11, D13, and Mack MP7 and MP8 engines, as well as 2013-2018 Volvo VNL, VNM, VNR, VN Series, and 2013-2018 Mack Pinnacle, Granite, and Anthem vehicles.

Don't let a failing AHI Dosing Module cause costly downtime for your commercial vehicle. Trust FleetRun FR-AFTR651 to provide you with a reliable replacement part.

What Is an AHI Dosing Module? 

The AHI Dosing Module controls the amount of fuel and the time at which it goes to the Aftertreatment Fuel Injector (AFI) through a signal from the ECM. The module contains non-replaceable valves and components within itself that cause it to be a common failing point from the point it was introduced (2013 and up).


There are 2 electrical connections, 1 is the main harness and the other is the fuel pressure sensor, along with 2 fuel connections, 1 on the rear side being the delivery to the Aftertreatment Fuel Injector and the other on top which is the supply to the module. Lastly, there is 1 air connection (which also can be problematic considering the module has its own air pressure regulator and air filter).


  • Volvo D11
  • Volvo D13
  • Mack MP7
  • Mack MP8


  • 2013-2018 Volvo VNL
  • 2013-2018 Volvo VNM
  • 2013-2018 Volvo VNR
  • 2013-2018 Volvo VN Series
  • 2013-2018 Mack Pinnacle
  • 2013-2018 Mack Granite
  • 2017-2018 Mack Anthem