
Paccar MX13 Fuel Injector 2014-2017: OEM 1972591PEX ( Set of 6 )
PACCAR MX13 FUEL INJECTOR 2014-2017: OEM 1972591PEX ( SET OF 6 )

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured OEX Reman Fuel Injector, OEX Reman part number 1972591RI-SET ( OEM Part Number 1972591PEX ). 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 MX13, production years 2014-2017, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 1972591PEX |
| Additional OEM | 1972591, 1972591PE, 1972591PEX, BEBJ1D02001, EX631145 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490538023 |
| WEIGHT | 12.00 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.
The Paccar MX13 Fuel Injector Set of 6 (OEM 1972591PEX) for 2014–2017 engines provides a complete replacement solution to restore balanced fuel delivery across all cylinders. Each injector is manufactured to Paccar’s exact specifications, ensuring precise fuel control and dependable performance in heavy-duty applications. With an OEM design, these injectors guarantee a direct fit, allowing for efficient installation without modifications. Built with durability in mind, they are engineered to handle the pressures of demanding use while maintaining long service life. For operators needing a reliable full set replacement, this injector kit is the trusted choice for the MX13 engine.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2014 | Paccar | MX13 | ||||
| 2015 | Paccar | MX13 | ||||
| 2016 | Paccar | MX13 | ||||
| 2017 | Paccar | MX13 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The OEM 1972591PEX fuel injector is a genuine Delphi-manufactured unit specifically designed for Paccar MX‑13 engines spanning model years 2014 to 2017. Typically sold remanufactured and matched in sets of six—one per cylinder—it aligns with OE specifications and is commonly listed under reman part numbers like 1972591RI
Key Highlights
- Genuine Delphi Remanufacturing
- Built to match or exceed factory standards; each unit receives new key components like nozzle, shim, spring, seals, and a calibrated control valve
- Unique Trim Coding
- Each injector is assigned a proprietary trim code during testing to ensure consistent performance within the fuel system
- Comprehensive Component Refresh:
- New nozzle control valve, stator, nozzle, spring assembly
- New O-rings and chamber gaskets included in the set
- Core charge applies, refundable upon timely return of a qualified core
- Warranty Coverage
- Backed by a 12-month unlimited-mileage warranty, offering confidence in durability and performance
- Cross-Reference Compatibility
- Fully interchangeable with part numbers such as 1972591, 1925657, 1952045, and reference designators like EX631145 and BEBJ1D00001
- Direct OEM Fit
- Guaranteed to bolt into the MX‑13 platform without modification, perfect for Kenworth and Peterbilt over-the-road trucks using MX‑13 engines
Opting for an OEM 1972591PEX injector set ensures your MX‑13 engine receives consistent, factory-calibrated fuel delivery, promoting smoother combustion and improved overall reliability. Replacing injectors as a matched set helps avoid performance imbalance and extends engine life. For best results, ensure proper torque settings, use clean fuel, and always return your cores promptly to benefit from the refund options. Let me know if you'd like this formatted for catalogs, technical bulletins, or service reference guides!
Fuel injectors are responsible for delivering the right amount of fuel to your engine for smooth and efficient operation. When they fail, your vehicle can experience rough idling, starting issues, and decreased fuel efficiency. Understanding what causes injector problems can help you prevent costly repairs.
Primary Reasons Fuel Injectors Fail
Here are the most common causes of fuel injector failure:
- Fuel Contamination
- Dirt, rust, or debris in the fuel system can clog injectors and disrupt fuel flow.
- Carbon Buildup
- Over time, carbon deposits accumulate on injector tips, limiting their ability to spray fuel properly.
- Electrical or Mechanical Issues
- Faulty wiring, worn seals, or internal component failure can prevent injectors from opening and closing as needed.
- Low-Quality Fuel
- Poor fuel without proper detergents accelerates wear, while water or impurities can cause corrosion and internal damage.
Routine maintenance and using high-quality fuel can extend the life of your injectors. If you notice rough idling, hard starts, or unusual fuel smells, have your injectors inspected immediately to avoid engine damage and expensive repairs.
While one injector can be replaced, many technicians recommend replacing all six for optimal engine balance.
Yes, installing new injectors restores proper fuel atomization and helps maintain fuel efficiency.
Installation should be performed by a qualified diesel technician following Paccar torque and ECU programming specifications.
These injectors can sometimes be rebuilt, but complete OEM replacements are often the more reliable option.










































































































































































































