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Paccar MX11 Fuel Injector : OEM 1974030PEX ( Set of 6 )

PACCAR MX11 FUEL INJECTOR : OEM 1974030PEX ( SET OF 6 )

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$3,294.00

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 1974030PEX
PART TYPE Fuel Injector
BRAND Tamerx Diesel Products
ENGINE MAKE Paccar
ENGINE TYPE MX11
YEAR
PART NUMBER 1974030RM-SET

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Fuel Injector, Tamerx part number 1974030RM-SET ( OEM Part Number 1974030PEX ). 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 Paccar MX11, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM1974030PEX
Additional OEM1974030, 1974030PEX, BEBJ1D03001, EX631144

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490538085
WEIGHT12.00 LBS

SHIPPING OPTIONS

Ship Weight : 12.00 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.


Fuel your rig’s performance with precision—meet the Paccar MX11 Fuel Injector Set (OEM 1974030PEX, set of 6), engineered to bring power and efficiency back to 2018+ MX-11 engines. These exact-fit injectors deliver laser-focused fuel delivery for cleaner combustion, sharper throttle response, and maximized fuel economy. Built to OEM standards for plug-and-play installation, they’re the perfect upgrade to restore engine finesse and get your MX-11 roaring again, mile after mile.

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Getting even, reliable fuel delivery across all cylinders is vital for the health of your Paccar MX11 engine—and the OEM 1974030PEX fuel injector set (six injectors) is engineered precisely for that purpose. Designed to meet original equipment specifications, this full set ensures balanced fuel distribution, smoother combustion, and consistent performance in every stroke.

  • Consistent Fuel Delivery Across the Engine
    By replacing all six injectors at once, the OEM 1974030PEX set guarantees uniform spray patterns, maintaining consistent atomization and combustion across all cylinders for smoother and more efficient operation.

  • Precision Fit for Paccar MX11 Engines
    Crafted to OEM specifications, these injectors fit flawlessly in MX11 engines, minimizing installation complications, reducing leak risk, and offering peace of mind that you’re installing proper equipment.

  • Promotes Fuel Efficiency and Clean Combustion
    With all injectors matched and operating uniformly, combustion remains cleaner and more efficient. This balance helps reduce unburned fuel, minimizes smoke output, and supports steady fuel consumption.

  • Reduces Downtime and Maintenance Uncertainty
    Replacing injectors one at a time can lead to uneven wear or mismatched injection profiles—often resulting in diagnostic challenges. A full set swap eliminates guesswork, bringing your engine back to proper synchronization in one go.

  • OEM Quality You Can Trust
    Built to meet original manufacturing standards, the OEM 1974030PEX injectors offer the durability expected from genuine components. Coupled with straightforward replacement and a reliable return policy, it’s an intelligent investment in your engine’s service life.

Delivering balanced fuel flow to every cylinder—and safeguarding against uneven injector performance—keeps your Paccar MX11 engine operating smoothly and responsibly. Choose the OEM 1974030PEX set from Tamerx Diesel Parts for the consistency and reliability that mileage demands.

Fuel injectors play a vital role in delivering fuel precisely into the combustion chamber of a diesel or gasoline engine. When they fail, engine performance suffers and emissions increase. Understanding the causes of fuel injector failure can help you avoid costly repairs and maintain vehicle reliability.

Common Causes of Fuel Injector Failure

  • Contaminated Fuel
    Dirt, debris, or rust in fuel can clog the injector nozzles. Poor filtration or bad fuel quality is one of the leading causes of injector issues.

  • Carbon Buildup
    Over time, unburned fuel and carbon deposits accumulate on the injector tip, affecting spray pattern and fuel atomization.

  • Electrical Problems
    Faulty wiring, worn connectors, or damaged solenoids can interrupt the signal to the injector, causing it to misfire or stay closed.

  • High Heat Exposure
    Prolonged exposure to high engine temperatures can degrade internal seals and components, eventually leading to leaks or failure.

  • Injector Seal Leaks
    Cracked or degraded O-rings and seals can allow fuel to leak, disrupting fuel delivery and causing engine performance issues.

  • Overuse or Age
    Injectors typically have a finite lifespan. Wear and tear from high mileage or poor maintenance practices can gradually reduce effectiveness.

Fuel injector failure can lead to rough idling, poor fuel economy, and even engine misfires. By using clean fuel, replacing filters regularly, and performing routine maintenance, you can extend the life of your fuel injectors and avoid unexpected breakdowns. If symptoms appear, early diagnosis and repair can help prevent further damage to your engine.

 

When regularly maintained and supplied with clean fluid and filtration, they generally endure well beyond 100,000 miles.

Uneven engine idle, cylinder imbalance, or diagnostic codes tied to injector performance may signal aging or clogging.

Inconsistent injection delivery can lead to combustion inefficiency, increased emissions, and a noticeable performance drop.

Monitoring injector pulse duration and flow uniformity through diagnostic tools highlights discrepancies in performance.

Paccar Fuel Injectors

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