
Cummins QSB 6.7L, QSB 4.5L High Pressure Fuel Pump 2014-2019: OEM 4989266RX
CUMMINS QSB 6.7L, QSB 4.5L HIGH PRESSURE FUEL PUMP 2014-2019: OEM 4989266RX

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured Tamerx High Pressure Fuel Pump, Tamerx part number 4989266RM ( OEM Part Number 4989266RX ). 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 Cummins QSB 6.7L, QSB 4.5L, production years 2014-2019, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
Primary OEM | 4989266RX |
Additional OEM | 0 445 020 109 0 445 020 176, 4989266, 4989266RX, 5262703, 6754721012 |
ADDITIONAL DETAILS
CONDITION | Remanufactured |
UPC / Barcode | |
WEIGHT | 18.00 LBS |
SHIPPING OPTIONS
Ship Weight : 18.00 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 OEM 4989266RX high pressure fuel pump is designed for 2014–2019 Cummins QSB 6.7L and QSB 4.5L engines, delivering precise fuel pressure to ensure consistent combustion and reliable engine operation. Built to meet exact factory specifications, this pump supports efficient fuel system function across a wide range of industrial and off-highway applications. Its direct-fit design allows for seamless installation and compatibility with existing components, reducing service time and minimizing equipment downtime. Ideal for both routine maintenance and critical repairs, this pump helps maintain engine efficiency and supports compliance with emissions standards. Rely on OEM-quality engineering to keep your Cummins-powered equipment operating smoothly under heavy workloads.
FITMENT CHART
YEAR | MAKE | ENGINE(S) | ||||
---|---|---|---|---|---|---|
2014 | Cummins | QSB 6.7L | QSB 4.5L | |||
2015 | Cummins | QSB 6.7L | QSB 4.5L | |||
2016 | Cummins | QSB 6.7L | QSB 4.5L | |||
2017 | Cummins | QSB 6.7L | QSB 4.5L | |||
2018 | Cummins | QSB 6.7L | QSB 4.5L | |||
2019 | Cummins | QSB 6.7L | QSB 4.5L |
PEOPLE ALSO ASKS | BLOG(S)
The high-pressure fuel pump is a critical component in modern diesel and direct-injection engines, responsible for delivering fuel at the necessary pressure for efficient combustion. When this pump starts to fail, it can lead to various engine performance issues and potential damage. In this blog, we will explore the common symptoms of a failing high-pressure fuel pump to help you identify and address problems early.
A failing high-pressure fuel pump can cause significant disruptions to your vehicle’s performance, fuel efficiency, and overall engine health. Recognizing the symptoms of a failing pump early can prevent more severe damage and costly repairs. Understanding these symptoms is essential for maintaining your vehicle’s optimal performance and longevity.
- Engine Misfires
- One of the most noticeable symptoms of a failing high-pressure fuel pump is engine misfires. When the pump cannot deliver fuel at the required pressure, the air-fuel mixture becomes unbalanced, causing the engine to misfire.
- Poor Acceleration
- If your vehicle struggles to accelerate or exhibits sluggish performance, it could be due to a failing fuel pump. Insufficient fuel pressure can hinder the engine's ability to produce power.
- Reduced Fuel Efficiency
- A high-pressure fuel pump that is not working correctly can lead to poor fuel economy. If you notice a sudden drop in miles per gallon, it might be a sign of pump issues.
- Hard Starting
- Difficulty starting the engine, especially after it has been sitting for a while, can indicate problems with the high-pressure fuel pump. The pump may not be able to maintain the necessary pressure to start the engine efficiently.
- Check Engine Light
- The check engine light can be triggered by various issues, including a failing high-pressure fuel pump. An OBD-II scanner can help identify error codes related to fuel pressure problems.
- Unusual Noises
- Listen for unusual noises coming from the fuel pump area, such as whining or buzzing sounds. These noises can indicate that the pump is struggling to operate correctly.
- Loss of Power Under Load
- If your vehicle experiences a noticeable loss of power when under load, such as during uphill driving or towing, it could be due to insufficient fuel pressure caused by a failing pump.
- Fuel Leaks
- Inspect for fuel leaks around the high-pressure fuel pump and its connections. Leaks can indicate that the pump is not sealing correctly and is losing pressure.
In summary, recognizing the symptoms of a failing high-pressure fuel pump is crucial for maintaining your vehicle’s performance and preventing costly repairs. Symptoms such as engine misfires, poor acceleration, reduced fuel efficiency, hard starting, check engine light, unusual noises, loss of power under load, and fuel leaks can all indicate problems with the pump. Addressing these issues promptly through professional diagnostics and repair can help ensure your vehicle continues to run smoothly and efficiently. Regular maintenance and timely attention to fuel system issues can extend the life of your high-pressure fuel pump and keep your engine performing at its best. If you suspect problems with your high-pressure fuel pump, consult a professional mechanic to diagnose and resolve the issue effectively.
Yes, a worn or malfunctioning high-pressure pump can result in fuel delivery issues, leading to rough starts or misfiring.
Causes include poor fuel quality, lack of filtration, running the tank low, or injector leakage increasing return flow.
No, injectors should also be tested, as excessive return flow may mimic pump-related low-pressure issues.
Yes, the pump is built with corrosion-resistant internals suited for continuous diesel fuel operation.