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Cummins QSF4.5, ISF4.5 Fuel Injector 2021-2024: OEM 5364543

CUMMINS QSF4.5, ISF4.5 FUEL INJECTOR 2021-2024: OEM 5364543

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$449.95

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 NUMBER5364543
PART TYPEFuel Injector
BRANDBosch
ENGINE MAKECummins
ENGINE TYPEQSF4.5, ISF4.5
YEAR2021-2024
PART NUMBER0 445 120 482

PRODUCT DESCRIPTION

This is a Genuine New, Bosch Fuel Injector, Bosch part number 0 445 120 482 ( OEM Part Number 5364543 ).This part is primarily made for a Cummins QSF4.5, ISF4.5, production years 2021-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5364543
Additional OEM5364543

ADDITIONAL DETAILS

CONDITIONGenuine New
UPC / Barcode00840490537989
WEIGHT1.00 LBS

SHIPPING OPTIONS

Ship Weight : 1.00 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.


Built to meet the demands of 2021–2024 Cummins QSF4.5 and ISF4.5 engines, the OEM 5364543 Fuel Injector delivers precise fuel metering in accordance with original equipment specifications. This component is engineered to provide accurate atomization and timing within high-pressure common rail systems. Manufactured with quality materials and tight tolerances, it is designed for durability in commercial and industrial diesel applications. Proper fuel injector operation is critical for maintaining balanced combustion and controlled emissions output. Tamerx Diesel Products LLC offers this Cummins fuel injector as a reliable replacement option for maintaining consistent fuel system function.

FITMENT CHART

YEARMAKEENGINE(S)
2021Cummins QSF4.5 ISF4.5
2022Cummins QSF4.5 ISF4.5
2023Cummins QSF4.5 ISF4.5
2024Cummins QSF4.5 ISF4.5

PEOPLE ALSO ASKS | BLOG(S)

The Cummins QSF4.5 and ISF4.5 Fuel Injector OEM 5364543 is a precision-engineered component designed to deliver fuel accurately and reliably in 2021–2024 diesel engine applications. While the injector appears as a single assembly, it is composed of several key internal elements that work together to control fuel delivery, spray pattern, and timing.

Core Injector Components

  • Injector Body
    • The main housing that holds all internal parts and interfaces with the fuel rail and cylinder head.
  • Nozzle/Tip
    • The part that atomizes fuel into a fine spray pattern as it enters the combustion chamber.
  • Needle Valve
    • A precision-machined valve that moves to open and close the fuel passage, controlling the start and stop of injection.
  • Solenoid or Piezo Actuator
    • An electronically actuated device that receives signals from the engine control module to trigger opening of the injector.
  • Springs
    • Internal springs that help regulate the movement of the needle valve and return it to the closed position.
  • Seals and O-Rings
    • Ensure fuel tightness between the injector and engine components, preventing leaks.

Supporting Internal Elements

  • Fuel Inlet Fitting
    • Connects the injector body to the high-pressure fuel rail.
  • Internal Passages
    • Precisely machined channels that guide fuel from the inlet to the nozzle.
  • Filter Screen
    • A small mesh element that helps prevent debris from entering sensitive internal areas.
  • Retaining Clips or Caps
    • Hold internal parts in position and secure the injector in the engine.

Together, these components allow the OEM 5364543 injector to deliver the exact amount of fuel at the right time, creating efficient combustion and supporting engine responsiveness. Proper function of every internal part is essential for reliable operation in Cummins QSF4.5 and ISF4.5 engines.

Fuel injectors are built to last, but they do not last forever. Over time, contamination, wear, and internal seal breakdown can affect how accurately they deliver fuel. Knowing when to replace them can help prevent more serious engine problems.

There is no fixed mileage for replacement. Instead, injectors should be replaced when clear symptoms of failure appear and testing confirms the issue.

Common signs it may be time for replacement include:

  • Persistent misfires
  • Rough idle that does not improve
  • Hard starting or long crank times
  • Excessive exhaust smoke
  • Noticeable fuel odor
  • Increased fuel consumption
  • Check engine light with injector-related codes

If cleaning does not correct the problem, replacement is often the next step. Severely clogged or internally worn injectors typically cannot be restored to proper function.

Leaking injectors are another serious concern. Fuel dripping into a cylinder can dilute engine oil and cause internal damage if ignored.

Professional diagnostic testing, such as balance tests or fuel pressure checks, can confirm whether a specific injector has failed.

Replacing a faulty injector promptly helps maintain smooth engine operation and prevents damage to pistons, valves, and other critical components.

Yes, the 5364543 injector is built to serve each individual cylinder on applicable inline four-cylinder Cummins engines.

The 5364543 injector integrates with the engine’s fuel management system to deliver timing and fuel quantity signals.

Diagnostic alerts for irregular fuel delivery often point to the need for inspection or service of the injector.

The 5364543 injector is installed using the original engine’s standard fuel rail and connector interfaces.

Cummins Fuel Injectors