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Cummins ISC, ISL, 8.3L Fuel Injector 2003-2012: OEM 5263308RX ( Set of 6 )

CUMMINS ISC, ISL, 8.3L FUEL INJECTOR 2003-2012: OEM 5263308RX ( SET OF 6 )

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$2,160.00

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 NUMBER5263308RX
PART TYPEFuel Injector
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISC, ISL, 8.3L
YEAR2003-2012
PART NUMBERDE812-SET

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Fuel Injector, Tamerx part number DE812-SET ( OEM Part Number 5263308RX ). 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 ISC, ISL, 8.3L, production years 2003-2012, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5263308RX
Additional OEM4940170, 0445120125, 0986435522, 5263308RX, 6745-12-3100, 84346812, 6745123100

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode
WEIGHT9.30 LBS

SHIPPING OPTIONS

Ship Weight : 9.30 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.


Engineered for consistent working conditions, the Cummins ISC, ISL, and 8.3L Fuel Injector Set (OEM 5263308RX) for 2003–2012 includes six injectors designed to deliver accurate fuel metering for efficient combustion. Specifically built for compatibility with ISC, ISL, and 8.3L Cummins engines, these injectors help maintain smooth engine operation and reliability under demanding conditions. Each unit undergoes extensive testing and inspection to ensure compliance with strict industry standards, making this set a dependable replacement option. Ideal for heavy-duty applications, it supports long-term durability and engine efficiency.

FITMENT CHART

YEARMAKEENGINE(S)
2003Cummins ISC ISL 8.3L
2004Cummins ISC ISL 8.3L
2005Cummins ISC ISL 8.3L
2006Cummins ISC ISL 8.3L
2007Cummins ISC ISL 8.3L
2008Cummins ISC ISL 8.3L
2009Cummins ISC ISL 8.3L
2010Cummins ISC ISL 8.3L
2011Cummins ISC ISL 8.3L
2012Cummins ISC ISL 8.3L

PEOPLE ALSO ASKS | BLOG(S)

Fuel injectors are essential components that deliver precise amounts of fuel to the engine, ensuring efficient combustion and optimal engine performance. The OEM 5263308RX fuel injector set, designed for Cummins ISC, ISL, and 8.3L engines from 2003 to 2012, helps maintain engine efficiency, prevent power loss, and improve fuel economy. Regular maintenance and timely replacement of fuel injectors can significantly extend engine life and reduce costly repairs.

Key Features of the Cummins ISC, ISL, 8.3L Fuel Injector OEM 5263308RX (Set of 6)

  • Precise Fuel Delivery
    • Ensures accurate fuel injection, enhancing combustion and promoting better engine efficiency.
  • OEM Quality
    • Built to Cummins’ strict standards, guaranteeing a perfect fit and long-lasting performance in ISC, ISL, and 8.3L engines.
  • Prevents Engine Problems
    • Helps avoid issues such as misfires, rough idling, and poor acceleration by delivering the right amount of fuel.
  • Improves Fuel Efficiency
    • Optimized fuel delivery improves combustion efficiency, leading to better fuel economy and lower operating costs.
  • Durable and Reliabl
    •  Constructed with high-quality materials to withstand the rigors of heavy-duty engine use, ensuring a longer lifespan.

Why Choose the OEM 5263308RX Fuel Injector Set for Your Cummins ISC, ISL, or 8.3L Engine?

Choosing the OEM 5263308RX fuel injector set ensures that your Cummins ISC, ISL, or 8.3L engine continues to perform at its best. Properly functioning fuel injectors are vital for maintaining engine power, improving fuel efficiency, and preventing costly engine repairs.

For Cummins engine owners from 2003 to 2012, the OEM 5263308RX fuel injector set provides a reliable solution to maintain engine health, extend fuel economy, and keep your engine running smoothly. Keep your engine performing optimally with this essential injector set replacement.

Fuel injectors are crucial components of your vehicle’s fuel system, responsible for delivering the right amount of fuel into the engine for combustion. When a fuel injector starts to malfunction, it can lead to a range of performance issues that affect your vehicle’s efficiency and drivability. Identifying the symptoms of a bad fuel injector early can help you address the problem promptly and avoid further damage. In this blog, we’ll explore the key signs that indicate your fuel injector might be failing.

  • Engine Misfires

    • One of the most common symptoms of a bad fuel injector is engine misfires. You might experience irregular engine performance, where the engine stutters or hesitates, particularly under acceleration. This occurs because the fuel injector is not delivering the correct amount of fuel to the combustion chamber.

  • Rough Idling

    •  If your vehicle idles roughly or unevenly, it could be due to a malfunctioning fuel injector. A bad injector can disrupt the smooth flow of fuel, leading to an unstable idle and a noticeable vibration in the engine.

  • Poor Acceleration

    •  A decrease in acceleration or power can indicate a failing fuel injector. When the injector isn’t functioning properly, the engine may struggle to respond to throttle inputs, resulting in sluggish acceleration and reduced performance.

  • Increased Fuel Consumption

    •  A bad fuel injector can cause increased fuel consumption. If you notice that you’re refueling more often than usual, it may be due to an injector that is not efficiently delivering fuel, leading to higher fuel usage.

  • Check Engine Light

    • The check engine light on your dashboard can illuminate if there is an issue with the fuel injectors. Modern vehicles have sensors that monitor the fuel system, and a problem with an injector can trigger this warning light.

  • Unusual Noises

    •  You might hear unusual noises, such as knocking or pinging sounds, coming from the engine. These noises can be a result of improper fuel delivery caused by a malfunctioning injector.

  • Fuel Leaks

    •  In some cases, a bad fuel injector can lead to fuel leaks around the injector area. Leaking fuel can cause strong odors and potentially hazardous conditions, making it important to address this issue immediately.

Recognizing the symptoms of a bad fuel injector is essential for maintaining your vehicle’s performance and efficiency. If you experience issues like engine misfires, rough idling, or increased fuel consumption, it’s crucial to have your fuel injectors checked and serviced as soon as possible. Addressing these symptoms early can help prevent more significant problems and ensure your vehicle runs smoothly.

The OEM 5263308RX fuel injector delivers precise amounts of fuel into the combustion chamber, ensuring efficient combustion and optimal engine operation.​

Symptoms include rough idling, decreased fuel efficiency, engine misfires, and difficulty starting, indicating potential injector issues.

Regularly using high-quality fuel, performing periodic fuel system cleanings, and promptly addressing engine issues can help maintain injector health.

Common causes include worn-out seals, cracked or damaged injector nozzles, loose connections in the fuel injector lines, clogged injectors causing pressure buildup, and corrosion from poor fuel quality or moisture.​

Cummins Fuel Injectors