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Cummins ISX DOC : OEM 4329543RX

CUMMINS ISX DOC : OEM 4329543RX

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$2,406.08

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 4329543RX
PART TYPE DOC
BRAND
ENGINE MAKE Cummins
ENGINE TYPE ISX
YEAR
PART NUMBER 102-0095

PRODUCT DESCRIPTION

This is a New, DOC, part number 102-0095 ( OEM Part Number 4329543RX ). 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 OEM4329543RX
Additional OEM4329543, 4329543NX, 4329543RX, 4353285, 4353285NX, 4353285RX, 5298345, 5298345NX, 5298345RX, A041P423, A045X393, A047V485

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode00840490538399
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.


Ensure your Cummins ISX engine runs clean and efficient with the Cummins DOC (Diesel Oxidation Catalyst) — OEM 4329543RX. Engineered to cut harmful pollutants and support optimal combustion, this durable catalyst delivers cleaner exhaust flow, reliable performance, and long-lasting engine health. Built to exact OEM standards for easy installation and dependable operation, it’s the ideal solution for maintaining emission compliance and powering your ISX with confidence mile after mile.

PEOPLE ALSO ASKS | BLOG(S)

Managing diesel emissions is more than ticking regulatory boxes—it begins with maintaining clarity in your exhaust stream. The OEM 4329543RX Diesel Oxidation Catalyst (DOC) plays a pivotal part in this, helping clean harmful pollutants before they reach downstream treatment stages. Built to Cummins specifications, this genuine DOC ensures cleaner exhaust flow, reducing wear and supporting the health of your entire aftertreatment system.

  • Efficient Pollutant Breakdown
    The OEM 4329543RX efficiently converts harmful exhaust components like hydrocarbons and carbon monoxide into cleaner byproducts. Cleaner exhaust promotes healthier downstream systems and smoother emissions control.

  • Enhances Overall Aftertreatment System Health
    With its precise catalytic function, this DOC helps reduce strain on downstream components such as DPFs and SCRs—enhancing longevity and reducing the need for premature part swaps or maintenance.

  • Streamlined Installation with OEM Fit
    Crafted to Cummins OEM specs, the 4329543RX DOC is a direct, no-hassle replacement—designed for quick, reliable integration with minimal downtime.

  • Helps Stabilize Regeneration and DPF Lifespan
    A well-functioning DOC contributes to better thermal conditioning for passive DPF regeneration. That means your filter stays cleaner longer and avoids triggering disruptive maintenance cycles.

  • Warranty Assurance and Easy Core Return
    Tamerx Diesel Parts backs this DOC with a solid one-year or one-million-mile warranty, giving you durable coverage you can count on. Plus, the core return policy simplifies servicing—return the worn unit and get refunded, hassle-free.

Reliable emissions cleaning starts at the DOC stage—and the OEM 4329543RX is the first line of defense against exhaust contaminants. Choose OEM precision and dependable protection from Tamerx Diesel Parts to safeguard your aftertreatment system and keep your Cummins ISX running cleanly and efficiently.

 

The Diesel Oxidation Catalyst (DOC) is an essential emissions control component in diesel engines, responsible for converting harmful pollutants like hydrocarbons (HC), carbon monoxide (CO), and some particulate matter into less harmful gases. However, like any component, the DOC can fail or become contaminated over time. Understanding what leads to these issues can help extend the life of your emissions system and prevent costly repairs.

Common Causes of DOC Failure or Contamination

  • Oil or Fuel Contamination
    If oil or raw diesel fuel enters the exhaust stream—often due to turbocharger seal leaks, faulty injectors, or over-fueling—it can coat the catalyst surface and reduce its ability to perform oxidation reactions.

  • Coolant Leaks
    When coolant leaks into the exhaust (often due to a failed EGR cooler or head gasket), it can leave behind residue on the DOC substrate, impeding flow and catalyst activity.

  • Excessive Soot Buildup
    A malfunctioning engine or fuel system can produce more soot than normal. Over time, this can clog the DOC and reduce its efficiency, particularly if the downstream DPF is not functioning properly.

  • Incorrect or Low-Quality Fuel and Oil
    Using fuels or lubricants that don’t meet OEM specifications can increase ash and sulfur content, accelerating DOC contamination and shortening its lifespan.

  • Over-Temperature Conditions
    Operating at excessive exhaust temperatures for extended periods can cause thermal damage to the catalyst material, cracking or melting the substrate and reducing efficiency.

  • Lack of Maintenance
    Skipping regular inspections or ignoring fault codes can allow minor issues to develop into major failures. A neglected DOC may degrade quietly until it triggers performance or emissions problems.

Maintaining a healthy DOC starts with engine upkeep—ensure proper fuel delivery, address leaks early, and use the correct oil and fuel types. Regular diagnostics and preventative service can catch issues before the DOC is compromised. When left unchecked, a contaminated or damaged DOC can impact downstream components like the DPF, leading to higher costs and greater downtime. Taking proactive measures is key to preserving your emissions system’s longevity and reliability.

 

Allow the exhaust to cool fully to avoid burns and ensure safe handling.

Failure to address issues can result in irreversible catalyst damage and elevated emission levels.

Continued inefficiency increases emission load and may overtax downstream aftertreatment units.

It usually signals reduced conversion efficiency or high backpressure in the catalyst module.

Cummins DOCs

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