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Cummins ISM DOC : OEM 4965223RX

CUMMINS ISM DOC : OEM 4965223RX

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,695.00

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 4965223RX
PART TYPE DOC
BRAND
ENGINE MAKE Cummins
ENGINE TYPE ISM
YEAR
PART NUMBER 102-0027

PRODUCT DESCRIPTION

This is a New, DOC, part number 102-0027 ( OEM Part Number 4965223RX ). This part is primarily made for a Cummins ISM, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4965223RX
Additional OEM207-075-0009, 4965223, 4965223NX, 4965223RX, 5287521, 5287521NX, 5287521RX, 58024, 434784, A035H536, C0043-ID, C043-ID, C20-0004, GESI-504, Q621401

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode00840490538696
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.


Elevate exhaust clarity and engine resilience with the Cummins ISM Diesel Oxidation Catalyst — OEM 4965223RX. Crafted to neutralize harmful emissions and optimize combustion, this premium DOC ensures cleaner exhaust flow, enhanced throttle efficiency, and steadfast reliability even during heavy-duty operations. Manufactured to precise OEM specs for a seamless drop-in fit and lasting durability, it’s the intelligent upgrade to support emissions compliance and dependable performance — mile after mile.

PEOPLE ALSO ASKS | BLOG(S)

A high-performing aftertreatment system starts with the Diesel Oxidation Catalyst—it's the first line of defense against harmful emissions. The OEM 4965223RX DOC is crafted to Cummins’ stringent specifications, ensuring efficient conversion of exhaust pollutants like hydrocarbons and carbon monoxide. Investing in this authentic replacement helps protect downstream components, promotes smooth DPF regeneration, and preserves system integrity.

  • Converts pollutants early in the exhaust stream, reducing the load on downstream filters and sensors, and helping maintain their longevity.

  • Supports reliable and predictable DPF regeneration by delivering cleaner exhaust flow and maintaining optimal temperature levels, reducing forced regens and maintenance disruptions.

  • Shields sensitive components like SCR catalysts and NOx sensors from contaminant buildup—preventing early wear and costly repairs.

  • Offers seamless replacement thanks to precise OEM engineering, ensuring fast, accurate installation and peace of mind.

  • Comes with warranty protection and a streamlined core return process, making maintenance easier and more cost-effective.

Swapping in the OEM 4965223RX DOC isn’t just about replacing a part—it’s about reinforcing your ISM’s first layer of emissions defense. For cleaner exhaust, smoother operations, and better aftertreatment health, count on Tamerx Diesel Parts’ reliable, OEM-quality solutions.

The Diesel Oxidation Catalyst (DOC) filter is an essential part of a diesel engine’s emissions control system. It oxidizes harmful gases like carbon monoxide and unburned hydrocarbons into less harmful emissions. Like other emission components, the DOC filter has a serviceable lifespan, and understanding how long it typically lasts helps prevent unexpected downtime and costly repairs.

Expected Lifespan of a DOC Filter

While the exact lifespan of a DOC filter can vary depending on engine use, maintenance habits, and environmental conditions, there are general guidelines to consider:

  • Typical Service Range
    Most DOC filters are designed to last between 200,000 to 400,000 miles or approximately 8,000 to 10,000 engine hours, depending on duty cycle and application.

  • Impact of Engine Conditions
    Engines that are properly tuned and maintained extend the filter’s life, while excessive idling, poor fuel quality, and oil blow-by can shorten it.

  • Regeneration Compatibility
    Regular and complete DPF regeneration indirectly helps the DOC by reducing soot load. However, excessive soot from failed regenerations may clog or contaminate the DOC.

  • Environment and Operating Habits
    Harsh environments (dust, heat, altitude) and start-stop driving increase wear, while highway driving supports better DOC longevity.

  • Inspection and Cleaning
    While DOC filters are not typically cleaned like DPFs, periodic inspection—especially during DPF service intervals—helps identify early signs of deterioration or plugging.

The DOC filter plays a quiet but vital role in emissions reduction. With proper vehicle maintenance and operating conditions, it can last several hundred thousand miles. Monitoring overall exhaust system performance, including fuel quality and DPF health, ensures the DOC continues functioning effectively throughout its intended service life.

The Cummins ISM DOC : OEM 4965223RX may show reduced emissions performance, high exhaust temperatures, or error codes.

A clogged Cummins ISM DOC : OEM 4965223RX increases exhaust restriction, reducing engine power and efficiency.

The Cummins ISM DOC : OEM 4965223RX can be evaluated by monitoring exhaust temperatures and conversion efficiency.

The Cummins ISM DOC : OEM 4965223RX should be inspected regularly during aftertreatment service to ensure clear airflow.

Cummins DOCs

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