
Cummins QSF4.5, ISF4.5 Fuel Injector 2021-2024: OEM 5364543 ( Set of 6 )
CUMMINS QSF4.5, ISF4.5 FUEL INJECTOR 2021-2024: OEM 5364543 ( SET OF 6 )

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine New, Bosch Fuel Injector, Bosch part number 0 445 120 482-SET ( 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 OEM | 5364543 |
| Additional OEM | 5364543 |
ADDITIONAL DETAILS
| CONDITION | Genuine New |
| UPC / Barcode | 00840490537996 |
| WEIGHT | 6.00 LBS |
SHIPPING OPTIONS
Ship Weight : 6.00 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.
Engineered as a matched set of six, the OEM 5364543 Fuel Injectors are designed for 2021–2024 Cummins QSF4.5 and ISF4.5 engine applications and built to meet original equipment specifications. Each injector delivers precise fuel metering and consistent atomization within high-pressure common rail systems. Manufactured with durable components and tight tolerances, these injectors are suited for demanding commercial and industrial diesel environments. Installing a complete set helps maintain even fuel distribution across all cylinders, supporting smooth and balanced combustion. Tamerx Diesel Products LLC offers this set of six Cummins fuel injectors as a reliable solution for dependable fuel system operation.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2021 | Cummins | QSF4.5 | ISF4.5 | |||
| 2022 | Cummins | QSF4.5 | ISF4.5 | |||
| 2023 | Cummins | QSF4.5 | ISF4.5 | |||
| 2024 | Cummins | QSF4.5 | ISF4.5 | |||
PEOPLE ALSO ASKS | BLOG(S)
Fuel delivery in modern Cummins engines depends on precise electronic control, and the OEM 5364543 Fuel Injector Set of 6 is engineered to handle that responsibility. Designed for 2021–2024 Cummins QSF4.5 and ISF4.5 applications, this injector set ensures each cylinder receives accurately timed and measured fuel.
The injectors operate as part of a high-pressure common rail fuel system. Fuel is pressurized in the rail and delivered to each injector. The engine control module (ECM) then signals the injector to open at exactly the right moment.
Here’s how the system works step by step:
- High-pressure fuel is supplied to each injector from the common rail
- The ECM sends an electronic signal to the injector actuator
- The actuator lifts the internal needle valve
- Fuel sprays through the nozzle in a fine mist
- The injector closes instantly after delivering the programmed amount of fuel
This rapid open-and-close process can occur multiple times per combustion cycle. Precise atomization allows the fuel to mix efficiently with compressed air, resulting in controlled combustion.
Using a complete set of six injectors ensures balanced fuel delivery across all cylinders. When injectors are evenly calibrated, the engine maintains smooth idle, steady throttle response, and consistent combustion.
The Cummins QSF4.5 and ISF4.5 Fuel Injector OEM 5364543 set works in constant coordination with the ECM to adjust fuel delivery based on load, speed, and operating conditions, supporting reliable and efficient engine operation.
If you’re experiencing injector problems, you may be wondering whether the unit can be serviced or if full replacement is necessary. The answer depends on the type of failure and how early the issue is detected.
Some fuel injectors can be serviced, while others cannot.
Injectors may be repairable if the issue involves:
- Minor clogging from carbon deposits
- Dirty or restricted nozzle tips
- External O-ring or seal wear
- Light contamination in the fuel system
In these cases, professional cleaning or replacing external seals may restore proper function.
However, replacement is typically required if there is:
- Internal solenoid or electrical failure
- Severe nozzle damage
- Cracked injector body
- Excessive internal leakage
- High-pressure wear beyond specification
Modern fuel injectors operate under extremely tight tolerances. Once internal components wear or fail electrically, repair options are often limited.
A professional inspection is important. Technicians may perform balance tests, leak-down testing, and scan diagnostics to confirm whether the injector is functioning within specification.
Catching problems early increases the chance that the injector can be cleaned or serviced. If damage is internal or extensive, replacement is usually the most reliable long-term solution.
This set includes six OEM 5364543 fuel injectors intended for full cylinder coverage on applicable engines.
A complete set of six injectors ensures uniform fuel delivery across every cylinder in the engine.
The set of six 5364543 injectors is engineered for direct installation on the specified engine applications.
A matched set of six helps maintain consistent fuel distribution and combustion characteristics across all cylinders.





















































