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Cummins DOC : OEM 4965304RX

CUMMINS DOC : OEM 4965304RX

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$2,285.93

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 4965304RX
PART TYPE DOC
BRAND
ENGINE MAKE Cummins
ENGINE TYPE
YEAR
PART NUMBER 102-0025

PRODUCT DESCRIPTION

This is a New, DOC, part number 102-0025 ( OEM Part Number 4965304RX ). This part is primarily made for a Cummins , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4965304RX
Additional OEM2888247, 2888247NX, 2888247RX, 4965304, 4965304NX, 4965304RX, A035W856, Q621319

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode00840490538658
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.


Upgrade your rig’s clean air efficiency with the Cummins DOC—OEM 4965304RX. This Diesel Oxidation Catalyst excels at reducing pollutants and smoothing combustion flow for cleaner exhaust, improved engine responsiveness, and long-term reliability. Made to exact OEM specifications for a hassle-free, drop-in installation and rugged durability, it's the smart, effective choice for engines on the road to peak emission compliance and performance—mile after mile.

PEOPLE ALSO ASKS | BLOG(S)

Ensuring your diesel engine’s emissions control system operates cleanly begins with the Diesel Oxidation Catalyst (DOC). The OEM 4965304RX DOC delivers precise pollutant conversion, safeguarding downstream components and enhancing the overall performance of your aftertreatment system. Genuine Cummins specifications make this replacement a dependable first step toward improved system longevity and cleaner exhaust emissions.

  • Efficient Breakdown of Harmful Exhaust Compounds
    The OEM 4965304RX DOC converts hydrocarbons and carbon monoxide into less harmful byproducts. This cleaner exhaust stream helps protect critical components downstream, like the DPF and SCR, from unnecessary stress and buildup.

  • Prevents Contaminants from Cascading Through the System
    A functional DOC acts as the first defense line—limiting fuel-derived contaminants from reaching particulate filters and NOx reduction modules, reducing the risk of sensor fouling and catalyst degradation.

  • Supports Consistent Regeneration Cycles
    By maintaining consistent exhaust quality and temperature, the OEM 4965304RX helps sustain effective DPF regeneration, reducing forced regen events and minimizing maintenance interruptions.

  • Smooth Installation with OEM Precision
    Engineered to meet Cummins original specifications, this DOC is crafted for seamless substitution—no adaptation needed. That ensures hassle-free servicing and dependable fitment.

  • Backed by Warranty with Easy Core Return
    The OEM 4965304RX comes with comprehensive warranty protection, reinforcing confidence in its durability. Plus, the streamlined core return process simplifies replacement—return your old DOC promptly and reduce your service cost.

Starting your aftertreatment cleanup with the right DOC matters. The OEM 4965304RX sets the stage for cleaner exhaust, smoother regeneration, and better protection for the entire emissions control system. Trust in Tamerx Diesel Parts to deliver OEM-quality components that support long-term reliability and cleaner engine operation.

The Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF) are both essential components of a diesel engine’s emissions system. Though they work together to reduce harmful emissions, they serve different functions. Understanding how they differ is key to diagnosing issues and performing proper maintenance.

Key Differences Between DOC and DPF

  • Primary Function

    • DOC: Converts carbon monoxide (CO), hydrocarbons (HC), and some particulate matter into less harmful emissions through oxidation.

    • DPF: Captures and stores soot (particulate matter) from the exhaust gas to prevent it from entering the atmosphere.

  • Location in the Exhaust System

    • DOC: Positioned upstream of the DPF; it is the first component in the aftertreatment system.

    • DPF: Located directly after the DOC to trap the soot oxidized by the DOC.

  • Role in Regeneration

    • DOC: Helps initiate the DPF regeneration process by increasing exhaust gas temperature.

    • DPF: Undergoes regeneration (either passive or active) to burn off collected soot and restore flow.

  • Construction

    • DOC: Typically made from a ceramic honeycomb structure coated with catalysts like platinum or palladium.

    • DPF: Also has a honeycomb design but is constructed to physically trap and filter soot particles.

  • Symptoms of Failure

    • DOC: May show signs like increased emissions, failed emission tests, or fault codes related to oxidation efficiency.

    • DPF: Often results in high exhaust backpressure, poor fuel economy, loss of power, or warning lights indicating regeneration failure.

While both the DOC and DPF are part of a diesel engine’s emissions control system, the DOC focuses on chemical conversion of gases while the DPF physically traps soot. Understanding their unique roles can help you maintain your engine’s health and stay compliant with emissions regulations. Regular inspection and timely service of both components are critical for optimal performance.

With clean exhaust and regular maintenance, it can last tens of thousands of miles before capacity diminishes.

Reduced conversion efficiency, elevated emissions readings, or irregular exhaust temperatures often indicate degradation.

By comparing inlet and outlet temperature readings or using diagnostic tools to measure conversion performance.

Ensuring clean exhaust flow and monitoring module temperatures helps sustain catalyst function.

Cummins DOCs

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