Loading...

Cummins QSB 6.7L Fuel Injector 2011-2016: OEM 5303101RX

CUMMINS QSB 6.7L FUEL INJECTOR 2011-2016: OEM 5303101RX

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$495.00

CORE CHARGE:

$150.00
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 NUMBER5303101RX
PART TYPEFuel Injector
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEQSB 6.7L
YEAR2011-2016
PART NUMBER5303101RM
APPLICATION NOTESMarine

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Fuel Injector, Tamerx part number 5303101RM ( OEM Part Number 5303101RX ). 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, production years 2011-2016, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5303101RX
Additional OEM0 445 120 356, 5303101RX

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490552548
WEIGHT2.00 LBS

SHIPPING OPTIONS

Ship Weight : 2.00 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.


Turn up your engine’s efficiency with the Cummins QSB 6.7L Fuel Injector 2011–2016 (OEM 5303101RX), engineered to deliver precise fuel delivery and stronger combustion. Built to OEM specifications, this injector promotes better throttle response and smoother performance across a wide range of operating conditions. Designed for durability and reliable operation, it’s a great upgrade for hardworking trucks and equipment. Keep your Cummins running cleaner and more efficiently with a component you can count on.

FITMENT CHART

YEARMAKEENGINE(S)
2011Cummins QSB 6.7L
2012Cummins QSB 6.7L
2013Cummins QSB 6.7L
2014Cummins QSB 6.7L
2015Cummins QSB 6.7L
2016Cummins QSB 6.7L

PEOPLE ALSO ASKS | BLOG(S)

Fuel injectors are vital to how a diesel engine breathes and performs. On Cummins QSB 6.7L engines from 2011 to 2016, the fuel injector delivers precisely metered fuel into the combustion chamber at exactly the right moment, helping ensure efficient combustion, smooth running, and reliable power. The Cummins QSB 6.7L Fuel Injector OEM 5303101RX from Tamerx Diesel Parts is crafted to meet original equipment specifications, offering a dependable replacement for worn or failing injectors and helping restore proper engine performance.

  • Delivers precise fuel metering to each combustion chamber, ensuring optimal fuel-to-air balance for efficient combustion and consistent power delivery

  • Designed for Cummins QSB 6.7L engines (2011–2016) with exact fitment, proper spray pattern, and seamless integration with the factory fuel system

  • Supports smoother engine operation by promoting even combustion across all cylinders, helping reduce rough idling, misfires, and uneven performance

  • OEM-grade construction (5303101RX) providing dependable durability, accurate fuel delivery, and compatibility with original engine components

  • Ideal for highway and heavy-duty use where reliable fuel injection and stable combustion help maintain performance under varied load conditions

Replacing a worn or malfunctioning fuel injector with the Cummins QSB 6.7L Fuel Injector OEM 5303101RX from Tamerx Diesel Parts helps restore precise fuel delivery and supports overall engine efficiency. Investing in a high-quality, OEM-matched injector ensures your engine maintains optimal combustion, smoother performance, and dependable operation across diverse driving conditions.

Fuel injectors play a key role in delivering the correct amount of fuel for efficient combustion. When an injector is not working properly, engine performance and fuel efficiency can suffer. Testing fuel injectors involves a combination of observation, diagnostics, and system checks to identify potential issues.

  • Listen for injector operation: A functioning injector often produces a consistent clicking sound during engine operation.

  • Check for diagnostic fault codes: Scan tools can reveal injector-related or misfire codes.

  • Monitor engine performance: Rough idle, hesitation, or misfires can indicate injector problems.

  • Inspect fuel pressure: Abnormal pressure readings may point to injector or fuel delivery issues.

  • Check for fuel leaks: Leaking injectors can cause strong fuel odors or visible fuel buildup.

  • Perform a balance or flow test: Professional testing measures how evenly each injector delivers fuel.

Testing fuel injectors helps identify issues before they cause more serious engine problems. Early diagnosis and proper repair support smooth engine operation, improved fuel efficiency, and long-term reliability.

Clogged injectors disrupt proper fuel flow, leading to misfires and rough running. In severe cases, the engine may struggle to start or run inefficiently.

Accurate fuel delivery is critical for complete combustion and optimal power generation. A quality injector ensures consistent fuel spray patterns for efficient burning.

Yes, technicians often inspect fuel lines, seals, and O-rings during injector service to make sure everything functions properly. Addressing worn parts helps prevent leaks and future issues.

Typical signs include hesitation under acceleration, uneven engine idle, and reduced fuel economy. These symptoms are often linked to uneven or improper fuel distribution.

Cummins Fuel Injectors

PRODUCT VIDEOS