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Cummins ISX DOC : OEM 4328760RX

CUMMINS ISX DOC : OEM 4328760RX

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,912.71

CORE CHARGE:

$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 NUMBER 4328760RX
PART TYPE DOC
BRAND
ENGINE MAKE Cummins
ENGINE TYPE ISX
YEAR
PART NUMBER 102-0069

PRODUCT DESCRIPTION

This is a New, DOC, part number 102-0069 ( OEM Part Number 4328760RX ). This part is primarily made for a Cummins ISX, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4328760RX
Additional OEM4328760, 4328760NX, 4328760RX, 4353257, 4353257NX, 4353257RX, 5302735, 5302735NX, 5302735RX, A042M051, A043U500, A047V455, OTR0152057

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode00840490538993
WEIGHT44.00 LBS

SHIPPING OPTIONS

Ship Weight : 44.00 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 dependable service, the Cummins ISX DOC: OEM 4328760RX ensures proper fit and consistent function for compatible ISX diesel engines. This diesel oxidation catalyst is manufactured to OEM specifications, providing effective emissions control while supporting reliable exhaust system performance. Its durable design offers long-term dependability in tough operating conditions, helping protect engine efficiency and maintain compliance with emissions standards. By choosing an OEM DOC, you reduce compatibility risks and safeguard the reliability of your equipment. This component is a reliable choice for keeping Cummins-powered trucks and machinery running smoothly.

PEOPLE ALSO ASKS | BLOG(S)

The Cummins Diesel Oxidation Catalyst (DOC), designated as 4328760RX, is a critical emissions control module used primarily in Cummins ISX (15-liter) and QSX engines, especially those built to meet EPA13 standards.

Core Functionality

As exhaust gases exit the engine, they pass through the DOC, where catalytic reactions occur on a specially coated substrate. These processes enable the DOC to:

  • Convert carbon monoxide (CO) into carbon dioxide (CO₂)
  • Oxidize unburned hydrocarbons (THC) into water vapor and CO₂
  • Transform nitric oxide (NO) into nitrogen dioxide (NO₂)

Why This Matters

The generation of NO₂ plays a crucial role in supporting passive regeneration of the Diesel Particulate Filter (DPF). By facilitating soot combustion at normal operating temperatures, the DOC reduces the need for active, fuel-consuming regeneration cycles. This leads to:

  • Improved DPF efficiency and reliability
  • Reduced maintenance requirements and downtime
  • Better emissions compliance and smoother system operation

Designed for long-term use and direct replacement, the OEM 4328760RX DOC ensures that aftertreatment systems perform exactly as intended—cleanly, efficiently, and reliably.

The Diesel Oxidation Catalyst (DOC) is designed to reduce harmful emissions by converting pollutants into less hazardous compounds. Like any component in the emissions system, it can become clogged over time—especially if upstream issues go unchecked.

Is Cleaning a Safe Option?

Yes, cleaning a clogged DOC is generally safeif done properly. The key is to use professional-grade equipment and follow OEM guidelines to avoid damaging the catalyst structure inside.

Safe Cleaning Methods Include:

  • Thermal baking – The DOC is heated in a controlled environment to burn off accumulated soot and ash.
  • Chemical soaking – Specialized cleaners dissolve deposits without harming the core material.
  • Pneumatic tools – Controlled air pressure removes loose particles from the surface.
  • Combined methods – Some shops use a mix of heat and fluid systems for deep cleaning.

If the DOC is contaminated with oil or coolant, or if internal damage is present (e.g., melted substrate), cleaning may not be effective. In these cases, inspection and possible replacement are safer routes.


Cleaning a DOC can be safe and effective—but only when done correctly. Regular inspection and timely service reduce the risk of irreversible damage.

It helps treat exhaust gases by reducing harmful emissions before they leave the system.

Yes, it is designed as a direct OEM replacement for simple installation.

Common signs include fault codes, smoke, or failed emissions tests.

Yes, it is built to original Cummins OEM specifications for proper fit and function.

Cummins DOCs

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