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Cummins QSB 4.5L Turbo Assembly 2018-2024: OEM 5353078RX

CUMMINS QSB 4.5L TURBO ASSEMBLY 2018-2024: OEM 5353078RX

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$5,895.00

CORE CHARGE:

$1,500.00
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 NUMBER5353078RX
PART TYPETurbo Assembly
BRANDHolset
ENGINE MAKECummins
ENGINE TYPEQSB 4.5L
YEAR2018-2024
PART NUMBER5353078-WA

PRODUCT DESCRIPTION

This is a Genuine New, Holset Turbo Assembly, Holset part number 5353078-WA ( OEM Part Number 5353078RX ).This part is primarily made for a Cummins QSB 4.5L, production years 2018-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM 5353078RX
Additional OEM 5328973, 5353078RX, 5502914

ADDITIONAL DETAILS

CONDITION Genuine New
UPC / Barcode 00840490537590
WEIGHT 33.00 LBS

SHIPPING OPTIONS

Ship Weight : 33.00 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.


Covering 2018–2024 Cummins QSB 4.5L engine applications, the OEM 5353078RX Turbo Assembly is manufactured to meet original equipment specifications for precise fit and reliable operation. This turbocharger assembly is designed to efficiently direct exhaust gases through the turbine, supporting proper airflow throughout the engine system. Built with durable components to withstand high temperatures and demanding working conditions, it is engineered for long-lasting service in commercial and industrial environments. Accurate balancing and quality construction help ensure smooth operation and consistent response. Tamerx Diesel Products LLC supplies this Cummins QSB 4.5L turbo assembly as a dependable solution for maintaining correct air handling and overall engine efficiency.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins QSB 4.5L
2019Cummins QSB 4.5L
2020Cummins QSB 4.5L
2021Cummins QSB 4.5L
2022Cummins QSB 4.5L
2023Cummins QSB 4.5L
2024Cummins QSB 4.5L

PEOPLE ALSO ASKS | BLOG(S)

Engine efficiency and reliability in the Cummins QSB 4.5L platform depend heavily on the turbocharger system. The Cummins QSB 4.5L Turbo Assembly OEM 5353078RX plays a critical role in managing airflow and supporting proper combustion in 2018–2024 applications.

The turbo assembly works by using exhaust gases to spin a turbine, which drives a compressor wheel that forces additional air into the engine’s intake system. This increased airflow allows the engine to burn fuel more effectively and maintain consistent operation under varying load conditions.

The Cummins QSB 4.5L Turbo Assembly is important because it:

  • Regulates and directs exhaust flow through the turbine
  • Compresses intake air before it enters the combustion chamber
  • Supports proper air-to-fuel ratios
  • Helps maintain emissions compliance
  • Contributes to overall engine efficiency

Without a properly functioning turbo assembly, the engine may experience reduced airflow, higher exhaust temperatures, loss of responsiveness, and potential fault codes. Over time, worn bearings, damaged turbine blades, or internal seal issues can affect reliability.

The OEM 5353078RX turbo assembly is engineered specifically for the Cummins QSB 4.5L engine, ensuring correct fitment and compatibility with factory systems. Proper turbo function supports steady engine output, controlled exhaust flow, and dependable operation across a wide range of industrial and equipment applications.

What Should I Do If My Turbo Assembly Is Failing?

A failing turbo assembly can quickly lead to serious engine issues if ignored. The turbo forces additional air into the engine to support combustion. When it begins to fail, drivability and reliability can suffer.

The first step is recognizing the warning signs.

Common symptoms of turbo failure include:

  • Loss of acceleration
  • Excessive exhaust smoke (black, blue, or white)
  • Whining or siren-like noises
  • Oil consumption increasing unexpectedly
  • Check engine light with boost-related codes
  • Sluggish throttle response

If you notice these symptoms, reduce heavy driving immediately. Continuing to operate the vehicle under load can worsen internal damage and send debris into the engine.

Next, have the vehicle professionally inspected. A technician will typically check:

  • Shaft play inside the turbo
  • Oil supply and return lines
  • Boost leaks in hoses or intercooler piping
  • Wastegate or actuator function

In some cases, the issue may be related to oil starvation or a clogged line rather than complete turbo failure.

If the turbo assembly is confirmed to be worn or damaged, replacement is often necessary. It’s also critical to address the root cause, such as restricted oil flow or contamination, to prevent repeat failure.

Acting quickly can help protect the engine and limit further repair costs.

The turbo assembly mounts on the exhaust manifold and interfaces with the intake and exhaust systems.

The 5353078RX turbo assembly is supplied to fit directly into the designated mounting points on the QSB 4.5L.

A failing turbo assembly can lead to reduced airflow efficiency and potential engine fault indications.

Using the correct OEM 5353078RX ensures alignment with Cummins specifications for the QSB 4.5L engine design.

Cummins Turbo Assemblys