
Cummins ISL DOC : OEM 2871923RX
CUMMINS ISL DOC : OEM 2871923RX

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, DOC, part number 102-0039 ( OEM Part Number 2871923RX ). This part is primarily made for a Cummins ISL, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
Primary OEM | 2871923RX |
Additional OEM | 281923, 2871469, 2871469NX, 2871773, 2871773NX, 2871923, 26326120259, 2871469RX, 2871773RX, 2871923NX, 2871923RX, A029B190, Q629360 |
ADDITIONAL DETAILS
CONDITION | New |
UPC / Barcode | 00840490538887 |
WEIGHT | 44.00 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.
The Cummins ISL DOC: OEM 2871923RX is designed to deliver precise fit and dependable service for Cummins ISL diesel engines. Manufactured to strict OEM standards, this diesel oxidation catalyst reduces harmful emissions while supporting consistent exhaust system performance. Its durable construction ensures long-term reliability in demanding operating conditions, helping to protect engine efficiency and maintain compliance with emissions regulations. Choosing an OEM DOC minimizes the risk of compatibility issues and promotes dependable operation. This component is a trusted solution for keeping Cummins-powered equipment running smoothly and effectively.
PEOPLE ALSO ASKS | BLOG(S)
The Cummins ISL Diesel Oxidation Catalyst (DOC), part number 2871923RX, plays a critical role in the exhaust aftertreatment system for Cummins ISL, ISC 8.3L, and Paccar PX-8 engines. This component is designed to reduce harmful emissions and support the overall health of the engine’s emissions system.
At its core, the DOC uses a precious-metal-coated substrate to initiate chemical reactions that neutralize harmful gases. As hot exhaust gases pass through it, the DOC converts carbon monoxide and unburned hydrocarbons into less harmful substances like carbon dioxide and water vapor.
Key Functions of the Cummins ISL DOC:
- Oxidizes carbon monoxide (CO) into carbon dioxide
- Converts unburned hydrocarbons (THC) into water vapor
- Produces nitrogen dioxide (NO₂) to support soot removal in the DPF
- Prepares exhaust for passive regeneration downstream
By producing NO₂, this DOC helps the Diesel Particulate Filter (DPF) clean itself during normal operation—reducing downtime and maintaining cleaner exhaust flow. The result is a more efficient aftertreatment system that supports emissions compliance without excessive maintenance.
The OEM 2871923RX DOC is built for direct replacement, ensuring durability and consistent performance in commercial-duty engines.
The Diesel Oxidation Catalyst (DOC) is a key component in your vehicle’s emissions system. It helps break down harmful gases and supports the function of the Diesel Particulate Filter (DPF). When the DOC becomes faulty, it may not immediately stop your vehicle—but that doesn’t mean it’s safe to ignore.
What Happens With a Faulty DOC?
Driving with a faulty DOC may seem manageable at first, but it can lead to serious issues over time:
- Increased emissions
- A malfunctioning DOC allows pollutants to exit the exhaust system.
- DPF regeneration problems
- The DOC helps create the right conditions for soot burn-off. Without it, the DPF can clog faster.
- Warning lights
- You may see the check engine light or fault codes related to exhaust sensors.
- Engine stress
- Poor exhaust flow can cause the engine to operate inefficiently.
Is It Safe to Drive?
Short-term driving may be possible, but prolonged use can damage other components, including the DPF and sensors. In some cases, the vehicle may even enter limp mode to prevent further damage.
If your DOC is showing signs of failure, it’s best to have it inspected and serviced as soon as possible.
Symptoms include emissions fault codes, excessive smoke, or regen cycle failures.
It can sometimes be cleaned, but replacement is needed if the catalyst material is damaged or worn out.
With proper maintenance and fuel quality, DOC units often last several hundred thousand miles.
Yes, contaminated fuel or excess oil can shorten DOC lifespan.