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Cummins QSL, 8.3L Fuel Injector 2003-2012: OEM 4993482 ( Set of 6 )

CUMMINS QSL, 8.3L FUEL INJECTOR 2003-2012: OEM 4993482 ( 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 NUMBER4993482
PART TYPEFuel Injector
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEQSL, 8.3L
YEAR2003-2012
PART NUMBERDE810-SET

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Fuel Injector, Tamerx part number DE810-SET ( OEM Part Number 4993482 ). 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 QSL, 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 OEM4993482
Additional OEM4945463, 4993482, 0445120038, 0445120133

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode
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.


Designed for reliability in demanding environments, the Cummins QSL and 8.3L Fuel Injector Set (OEM 4993482) for 2003–2012 includes six high-precision injectors built to meet the needs of these engines. Each injector is engineered to deliver accurate fuel metering, supporting efficient combustion and consistent engine operation across various heavy-duty applications. Thoroughly tested and inspected to meet strict industry and quality standards, this set provides a dependable replacement solution. Ideal for maintaining long-term engine function, the injectors help ensure durability, fuel efficiency, and smooth working conditions under load.

FITMENT CHART

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

PEOPLE ALSO ASKS | BLOG(S)

The fuel injectors in your Cummins QSL 8.3L engine play a critical role in delivering the precise amount of fuel needed for efficient combustion. Over time, injectors can wear down, leading to poor fuel efficiency, rough idling, or engine misfires. The OEM 4993482 fuel injector set (6) is designed specifically for Cummins QSL engines produced between 2003 and 2012, ensuring optimal engine performance and longevity.

Key Features of the Cummins QSL, 8.3L Fuel Injector OEM 4993482 (Set of 6)

  • Accurate Fuel Delivery
    •  Ensures precise fuel injection, promoting efficient combustion and smooth engine performance.
  • OEM Quality
    • Manufactured to Cummins’ high standards, ensuring a perfect fit and reliable performance for QSL 8.3L engines.
  • Prevents Common Engine Issues
    •  Replacing worn injectors helps prevent rough idling, misfires, and reduced engine power.
  • Improves Fuel Efficiency
    •  Proper fuel injection optimizes combustion, improving fuel economy and reducing operational costs.
  • Durable Construction
    •  Built to withstand the demands of heavy-duty use, ensuring long-lasting reliability and consistent performance.

Why Choose the OEM 4993482 Fuel Injector Set for Your Cummins QSL, 8.3L Engine?

Investing in the OEM 4993482 fuel injector set ensures that your Cummins QSL 8.3L engine continues to run efficiently, reducing the risk of engine problems and improving overall fuel economy. Regular replacement of worn or faulty injectors can extend the life of your engine and prevent costly repairs down the road.

For those maintaining Cummins QSL 8.3L engines from 2003 to 2012, choosing the OEM 4993482 injector set is essential for ensuring reliable engine performance, smooth operation, and enhanced fuel efficiency.

Fuel injectors are essential components in modern engines, responsible for delivering the precise amount of fuel needed for efficient combustion. When a fuel injector malfunctions, it can disrupt the engine’s performance and lead to a range of issues. Understanding the consequences of a bad fuel injector is crucial for maintaining your vehicle's health and ensuring smooth operation. In this blog, we'll explore what happens when a fuel injector goes bad and how it can affect your vehicle.

  • Decreased Engine Performance

    • A bad fuel injector can lead to a noticeable drop in engine performance. You may experience reduced acceleration, lower power output, and difficulty reaching optimal speeds, affecting overall driving experience.

  • Poor Fuel Efficiency

    • When a fuel injector fails, it can result in poor fuel efficiency. The engine may burn more fuel than necessary, increasing your fuel expenses and reducing the vehicle’s overall mileage.

  • Engine Misfires

    • One of the common signs of a failing fuel injector is engine misfires. This can cause the engine to run unevenly, with rough idling and noticeable vibrations, impacting the vehicle's reliability and comfort.

  • Increased Exhaust Emissions

    •  A malfunctioning fuel injector disrupts the proper burning of fuel, leading to higher exhaust emissions. This can contribute to environmental pollution and potentially cause your vehicle to fail emissions tests.

  • Difficulty Starting the Engine

    • If the fuel injector is not delivering fuel correctly, you may face challenges starting the engine. This could involve extended cranking times or even a complete failure to start.

  • Rough Idling

    • A bad fuel injector can cause rough idling, where the engine feels unstable or shaky when the vehicle is stationary. This symptom often indicates that the fuel injector isn’t providing a consistent fuel flow.

  • Unusual Noises

    • Listen for unusual sounds such as knocking or sputtering from the engine. These noises can be a result of irregular fuel delivery due to a malfunctioning fuel injector.

A bad fuel injector can significantly impact your vehicle’s performance, fuel efficiency, and overall reliability. Recognizing the signs of a failing injector, such as decreased engine performance, poor fuel economy, and engine misfires, is essential for timely repairs. Addressing injector issues promptly will help maintain your vehicle’s optimal operation and prevent more severe problems down the road.

Use clean, ultra-low sulfur diesel with proper filtration to avoid clogging or damage to the injector components.

You’ll need an injector puller, torque wrench, line wrenches, and potentially a valve cover gasket if removed during service.

Use a cylinder cutout test, return flow test, and visual inspection for carbon buildup, leaks, or electrical faults.

Excessive return flow can lead to hard starts, low rail pressure, and uneven fuel delivery across cylinders.

Cummins Fuel Injectors