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Cummins 4BT Fuel Injector Pump : OEM 3963963

CUMMINS 4BT FUEL INJECTOR PUMP : OEM 3963963

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$2,370.00

CORE CHARGE:

$900.00
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 NUMBER3963963
PART TYPEFuel Injector Pump
BRANDCummins
ENGINE MAKECummins
ENGINE TYPE4BT
YEAR
PART NUMBER3963963RM

PRODUCT DESCRIPTION

This is a Remanufactured Cummins Fuel Injector Pump, Cummins part number 3963963RM ( OEM Part Number 3963963 ). 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 4BT, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM3963963
Additional OEM0 460 424 288, 3963963, 0460424288, 3963963RX, VE4R963-1

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode086547479028
WEIGHT18.00 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.


Featuring precision engineering, the Tamerx part Number Cummins 4BT Fuel Injector Pump (OEM 3963963) stands as the epitome of diesel engine excellence. As a premium replacement part company, Tamerx offers an unmatched solution for optimal durability. Meticulously crafted, this fuel injector pump ensures seamless integration, guaranteeing superior functionality for Cummins 4BT engines. Trust Tamerx for unwavering quality, surpassing industry benchmarks, and providing the finest replacement option for the OEM 3963963. Elevate your diesel engine's capabilities with confidence, choosing Tamerx—a symbol of steadfast commitment to excellence in replacement parts for the Cummins 4BT Fuel Injector Pump.

PEOPLE ALSO ASKS | BLOG(S)

The fuel injector pump is a vital component in the Cummins 4BT engine, responsible for delivering fuel at the right pressure to ensure optimal combustion. The Cummins 4BT Fuel Injector Pump (OEM 3963963) helps maintain smooth engine operation by ensuring the precise amount of fuel reaches the combustion chamber. Proper care and timely maintenance of the fuel injector pump can enhance engine efficiency and longevity.

Key Functions of the Cummins 4BT Fuel Injector Pump

  • Regulates Fuel Pressure
    •  The pump ensures that fuel is delivered at the correct pressure to support efficient combustion in the engine.
  • Controls Fuel Flow
    •  It controls the flow of fuel to the injectors, ensuring precise timing and volume for optimal engine performance.
  • Prevents Engine Misfires
    •  By delivering the right amount of fuel, the pump helps prevent engine misfires and reduces the risk of stalling.
  • Durable and Reliable
    • The OEM 3963963 fuel injector pump is designed for long-term use, providing reliability in tough engine conditions.

Maintenance Tips for the Fuel Injector Pump

  • Regular Inspections
    • Periodically check the fuel pump for any signs of wear, leaks, or damage that could affect fuel delivery.
  • Monitor Engine Performance
    •  If you notice a drop in fuel efficiency or issues such as rough idling, it may be time to inspect or replace the fuel injector pump.
  • Ensure Clean Fuel
    • Use high-quality, clean fuel to avoid clogging the injector pump, which could affect its efficiency.
  • Replace When Necessary
    •  When the pump starts to show signs of wear or malfunction, replacing it with the OEM 3963963 will restore optimal fuel delivery and engine function.

The Cummins 4BT Fuel Injector Pump (OEM 3963963) is essential for maintaining precise fuel delivery and ensuring efficient engine performance. Regular maintenance, such as inspections and replacements, will keep your engine running smoothly and prevent costly repairs. Trust TamerX Diesel Parts for reliable, high-quality fuel injector pumps and other essential components to keep your engine in top condition.

The fuel injector pump is a crucial component in your vehicle's fuel system, responsible for delivering the precise amount of fuel to the engine at the right pressure. When a fuel injector pump fails, it can lead to significant performance issues and even engine damage. Understanding the common causes of fuel injector pump failure can help you take preventive measures to keep your vehicle running smoothly.

Common Causes of Fuel Injector Pump Failure:

  • Fuel Contamination

    • Dirty or contaminated fuel is one of the leading causes of fuel injector pump failure. Water, debris, or other impurities in the fuel can damage the pump’s internal components, leading to malfunction.

  • Poor Maintenance

    • Lack of regular maintenance, such as infrequent fuel filter changes, can cause fuel contamination to build up, clogging the injector pump and reducing its efficiency.

  • Excessive Wear

    • Over time, the high-pressure environment in which the fuel injector pump operates can lead to natural wear and tear. If the pump components wear out, it may struggle to maintain the correct fuel pressure.

  • Low-Quality Fuel

    • Using low-quality fuel with inadequate lubrication properties can cause friction within the fuel injector pump, accelerating wear and leading to premature failure.

  • Fuel Pump Overheating

    • The pump relies on the fuel itself to keep it cool. Running the vehicle on low fuel levels for extended periods can cause the pump to overheat, leading to damage.

  • Electrical Problems

    • Faulty wiring or electrical connections can prevent the pump from operating correctly, causing it to fail. Electrical failures can lead to inconsistent fuel delivery and reduced engine performance.

A failing fuel injector pump can cause engine performance issues, fuel inefficiency, and potential long-term engine damage. Regular maintenance, using high-quality fuel, and ensuring clean fuel filters can help prevent many of the common causes of injector pump failure. If you notice signs of a failing fuel injector pump, it's important to address the issue promptly to avoid more costly repairs.

Non-OEM parts may not meet quality standards, leading to poor performance, fitment issues, and reduced lifespan.

A properly functioning pump ensures consistent power delivery, improving the engine's ability to handle heavy loads.

Contaminated fuel can clog the pump, causing wear and reducing its efficiency and lifespan.

Inspect fuel lines, filters, and the fuel tank for contamination or blockages to prevent future issues.

Cummins Fuel Injector Pumps