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Mack MP8 Fuel Injector 2008-2010: OEM 85003924 ( Set of 6 )

MACK MP8 FUEL INJECTOR 2008-2010: OEM 85003924 ( SET OF 6 )

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$2,495.00

-
+

CORE CHARGE:

$1,500.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER 85003924
PART TYPE Fuel Injector
BRAND OEX
ENGINE MAKE Mack
ENGINE TYPE MP8
YEAR 2008-2010
PART NUMBER 85003924RI-2-SET

PRODUCT DESCRIPTION

This is a Remanufactured OEX Fuel Injector, OEX part number 85003924RI-2-SET ( OEM Part Number 85003924 ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Mack MP8, production years 2008-2010, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM 85003924
Additional OEM 85003656, 85003924, 85144092

ADDITIONAL DETAILS

CONDITION Remanufactured
UPC / Barcode
WEIGHT 24.00 LBS

SHIPPING OPTIONS

Ship Weight : 24.00 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


Designed for Mack MP8 engines from 2008 to 2010, this OEM set of six 85003924 fuel injectors offers a dependable solution for maintaining proper fuel system function. Each injector is manufactured to match factory specifications, providing consistent fuel delivery and supporting stable engine operation in a range of heavy-duty trucking applications. Ideal for both preventative maintenance and injector replacement, this set installs directly with no modifications required. It’s a practical choice for keeping your engine running efficiently while minimizing downtime in the shop or on the road.

FITMENT CHART

YEAR MAKE ENGINE(S)
2008 Mack MP8
2009 Mack MP8
2010 Mack MP8

PEOPLE ALSO ASKS | BLOG(S)

The fuel injectors in your Mack MP8 engine are essential for proper engine performance and fuel economy. The Mack MP8 Fuel Injector (OEM 85003924) set of six is designed to deliver precise amounts of fuel, ensuring that your engine operates smoothly. Maintaining these injectors is vital to keeping your engine running efficiently and avoiding costly repairs down the road.

Functions of the Mack MP8 Fuel Injector

  • Accurate Fuel Delivery
    • These injectors ensure that the correct amount of fuel is delivered to the combustion chamber, promoting efficient combustion.
  • Improved Fuel Economy
    • By ensuring proper fuel atomization, these injectors help to reduce fuel consumption, saving money over time.
  • Reduced Emissions
    • Clean fuel injectors contribute to lower exhaust emissions by promoting more complete combustion.
  • Durable Construction
    •  Designed to handle heavy-duty applications, the OEM 85003924 injectors are built for durability and long-term use.

The Mack MP8 Fuel Injector (OEM 85003924) set of six is key to maintaining efficient fuel delivery and ensuring smooth engine performance. Regular maintenance and timely replacement of these injectors will enhance fuel economy, reduce emissions, and extend the lifespan of your engine. Trust TamerX Diesel Parts for reliable, high-quality fuel injectors and all your diesel engine needs.

Fuel injectors are vital components in your vehicle’s engine, responsible for delivering the precise amount of fuel needed for optimal combustion. While they are built to be durable, fuel injectors don’t last forever. Understanding the typical lifespan of a fuel injector and the factors that can affect it will help you maintain your engine’s performance and avoid costly repairs.

Typical Lifespan of a Fuel Injector

On average, fuel injectors are designed to last anywhere from 50,000 to 100,000 miles or more, depending on various factors. However, their lifespan can vary based on a few key conditions:

  • Fuel Quality
    • Low-quality or contaminated fuel can clog or damage fuel injectors, leading to premature failure. Using high-quality fuel and keeping your fuel system clean can extend the life of your injectors.
  • Maintenance Habits
    • Regular maintenance, such as changing your fuel filters and using fuel injector cleaners, can help prevent buildup and keep your injectors functioning properly for longer.
  • Driving Conditions
    • Frequent stop-and-go driving, heavy loads, or driving in extreme temperatures can put additional stress on the injectors, shortening their lifespan.
  • Injector Type
    • Direct injection systems may wear out faster compared to traditional fuel injection systems due to the higher pressure involved.

Fuel injectors play a crucial role in your vehicle's engine performance, and their lifespan can vary depending on fuel quality, driving habits, and maintenance practices. While injectors typically last between 50,000 to 100,000 miles, staying proactive with regular maintenance and using high-quality fuel can help extend their life. If you notice any signs of injector wear, it’s essential to address the issue promptly to avoid more significant engine problems.

Yes, injector issues like poor spray pattern or internal leakage can cause rough idle without immediately triggering diagnostic codes.

A stuck-open injector often causes fuel knock or white smoke, while a stuck-closed injector may lead to a dead cylinder or hard starting.

Yes, low-grade fuel can introduce contaminants that damage the nozzle or internal seals, reducing injector lifespan and performance.

Each injector has a specified return flow tolerance; excessive return flow often indicates internal leakage and injector wear.

Mack Fuel Injectors