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Komatsu 6.7L Turbo Assembly 2014-2018: OEM 5321720

KOMATSU 6.7L TURBO ASSEMBLY 2014-2018: OEM 5321720

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$5,670.00

AVAILABILITY IN STOCK
OEM NUMBER5321720
PART TYPETurbo Assembly
BRANDTamerx Diesel Products
ENGINE MAKEKomatsu
ENGINE TYPE6.7L
YEAR2014-2018
PART NUMBER5321720RM
ADDITIONAL NOTESHE300

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Turbo Assembly, Tamerx part number 5321720RM ( OEM Part Number 5321720 ). 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 Komatsu 6.7L, production years 2014-2018, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: HE300

OEM NUMBERS

Primary OEM5321720
Additional OEM5321720, 5552881

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490552494
WEIGHT58.00 LBS

SHIPPING OPTIONS

Ship Weight : 58.00 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 2014–2018 Komatsu 6.7L diesel applications, the Turbo Assembly with OEM 5321720 is a key component of the engine’s forced-induction system. This turbocharger assembly is engineered to match the 6.7L engine’s exhaust and intake configurations, ensuring proper fitment with factory components. Its function is to compress intake air using exhaust gas energy, helping increase engine efficiency and support stable combustion under various operating conditions. A correctly functioning turbo assembly contributes to balanced air delivery, supports smoother engine response, and helps maintain overall drivetrain reliability. This page provides application-specific details to assist with identifying the Komatsu 6.7L Turbo Assembly 2014–2018 (OEM 5321720) for service and replacement needs.

FITMENT CHART

YEARMAKEENGINE(S)
2014Komatsu 6.7L
2015Komatsu 6.7L
2016Komatsu 6.7L
2017Komatsu 6.7L
2018Komatsu 6.7L

PEOPLE ALSO ASKS | BLOG(S)

The Komatsu 6.7L Turbo Assembly, OEM 5321720, is a complete turbocharging unit used on 2014–2018 Komatsu 6.7-liter diesel engines found in a wide range of construction and industrial equipment. This component plays an essential role in managing airflow and supporting efficient engine operation under demanding conditions.

The turbo assembly uses exhaust energy to drive a turbine, which in turn spins a compressor wheel on the intake side. This process forces more air into the engine cylinders, allowing fuel to burn more effectively and consistently. The result is smoother operation and better response when equipment is working under load.

A complete turbo assembly like OEM 5321720 typically includes several integrated parts designed to work together reliably.

Key components and functions include:

  • Turbine and compressor wheels for airflow control
  • Central bearing housing and shaft assembly
  • Oil passages and seals for lubrication and durability
  • Exhaust and intake housings for proper gas routing
  • Mounting points matched to Komatsu 6.7L engines

Because the turbo operates under extreme heat and rotational speed, correct fitment and internal balance are critical. Using the proper OEM turbo assembly helps ensure compatibility with the engine’s airflow, lubrication, and exhaust systems.

The Komatsu 6.7L Turbo Assembly (OEM 5321720) is a vital engine component that supports reliable airflow management and consistent operation in 2014–2018 Komatsu equipment applications.

You can prolong the lifespan of a turbo assembly by keeping the oil supply clean and consistent, preventing excessive heat, and avoiding operating conditions that place unnecessary stress on the turbocharger. Since a turbo spins at extremely high speeds, even small issues can shorten its life quickly.

Best ways to extend turbo assembly lifespan

  • Maintain clean, high-quality engine oil
    • The turbo relies on engine oil for lubrication and cooling. Dirty or degraded oil causes bearing wear and shaft damage.
  • Follow proper oil change intervals
    • Extended oil change intervals increase the risk of oil contamination and coking inside the turbo.
  • Allow proper warm-up time
    • Cold oil doesn’t lubricate well. Gentle driving during warm-up helps protect the turbo bearings.
  • Let the turbo cool before shutdown
    • After heavy driving, allow the engine to idle briefly before shutting off so heat can dissipate and prevent oil coking.
  • Fix oil supply and drain issues immediately
    • Restricted oil feed or drain lines can quickly destroy a turbo assembly.
  • Keep the air intake system clean and sealed
    • Dirt or debris entering the turbo can damage the compressor wheel and imbalance the assembly.
  • Address exhaust restrictions early
    • Problems with the DOC, DPF, or SCR increase exhaust backpressure and heat, placing extra stress on the turbo.
  • Repair boost control issues promptly
    • Faulty actuators, stuck vanes, or boost leaks can cause the turbo to operate outside its safe range.

A turbo assembly lasts longest when oil quality is maintained, heat is managed, airflow is clean, and exhaust and boost control issues are corrected early.

Yes, a failing turbo assembly can lead to loss of airflow, reduced engine response, or exhaust smoke due to incomplete combustion.

Yes, it is specified by Komatsu as the turbo assembly that matches original fit and function for the 6.7L application.

Yes, the turbo assembly can typically be removed and replaced on its own without changing other engine components.

Technicians should inspect exhaust routing, oil supply to the turbo bearings, and air leaks in the intake system.

Komatsu Turbo Assemblys