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Cummins ISL, ISX12G DOC Filter 2011-2020: OEM 5307531

CUMMINS ISL, ISX12G DOC FILTER 2011-2020: OEM 5307531

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$6,995.00

CORE CHARGE:

$1,500.00
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 NUMBER5307531
PART TYPEDOC Filter
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISL, ISX12G
YEAR2011-2020
PART NUMBER5307531RM-DOC
APPLICATION NOTESTier 4
ADDITIONAL NOTESInlet Catalyst

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx DOC Filter, Tamerx part number 5307531RM-DOC ( OEM Part Number 5307531 ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Cummins ISL, ISX12G, production years 2011-2020, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: Inlet Catalyst

OEM NUMBERS

Primary OEM5307531
Additional OEM5307531

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490554153
WEIGHT61.00 LBS

SHIPPING OPTIONS

Ship Weight : 61.00 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 exhaust aftertreatment operation, the Cummins ISL / ISX12G DOC Filter (2011–2020) OEM 5307531 is an essential component for maintaining proper diesel oxidation catalyst function. Manufactured to meet original equipment specifications, it ensures accurate compatibility with Cummins ISL and ISX12G engines within the specified model years. This DOC filter works to convert hydrocarbons and carbon monoxide in the exhaust stream into less harmful emissions, supporting cleaner operation and regulatory compliance. As part of the overall aftertreatment system, it contributes to reducing multiple pollutants before they exit the exhaust. Built from durable, high-quality materials, it is engineered to withstand high temperatures and demanding diesel applications. Ideal for technicians and fleet maintenance professionals, this OEM filter helps maintain consistent system function and long-term reliability.

FITMENT CHART

YEARMAKEENGINE(S)
2011Cummins ISL ISX12G
2012Cummins ISL ISX12G
2013Cummins ISL ISX12G
2014Cummins ISL ISX12G
2015Cummins ISL ISX12G
2016Cummins ISL ISX12G
2017Cummins ISL ISX12G
2018Cummins ISL ISX12G
2019Cummins ISL ISX12G
2020Cummins ISL ISX12G

PEOPLE ALSO ASKS | BLOG(S)

The Cummins ISL / ISX12G DOC Filter (OEM 5307531) serves as a foundational component in the exhaust aftertreatment system, responsible for initiating the cleaning process of exhaust gases. Designed for 2011–2020 applications, it plays a key role in reducing harmful compounds early in the exhaust flow.

Unlike filters that trap particles, the Diesel Oxidation Catalyst (DOC) works by triggering chemical reactions that convert pollutants into less harmful substances as exhaust gases pass through.

Here are the main functions of this DOC filter:

  • Oxidizes harmful exhaust gases
    • The DOC converts carbon monoxide (CO) and unburned hydrocarbons (HC) into carbon dioxide (CO₂) and water vapor through a catalytic reaction.
  • Acts as the first stage of emissions treatment
    • Positioned upstream, it prepares exhaust gases before they reach components like the DPF or SCR system.
  • Generates heat for downstream processes
    • The oxidation reaction produces heat, which is essential for supporting proper operation of the diesel particulate filter (DPF).
  • Supports cleaner exhaust output
    • By reducing harmful compounds early, it helps improve the overall effectiveness of the emissions system.
  • Operates continuously during engine use
    • The DOC works automatically as exhaust flows through it, requiring no additional input or fluid.
  • Helps maintain system balance and efficiency
    • Proper DOC function ensures downstream components are not overloaded, contributing to smoother overall system operation.

In summary, the Cummins 5307531 DOC filter functions as the starting point of exhaust treatment—using catalytic reactions to reduce harmful gases and support the efficiency of the entire aftertreatment system.

A failing Diesel Oxidation Catalyst (DOC) filter can lead to restricted exhaust flow and reduced system efficiency. Addressing the issue early is important to prevent further complications and keep your engine running properly.

The first step is identifying the cause, as DOC filter problems are often linked to buildup, fuel quality, or underlying engine issues. Taking the right steps can help restore proper function or determine if replacement is needed.

Here’s what you should do:

  • Inspect for soot or ash buildup
    • Check for visible signs of contamination inside the DOC. Excessive buildup can restrict exhaust flow and reduce effectiveness.
  • Review fuel quality and usage
    • Poor-quality fuel can introduce more contaminants into the exhaust system, accelerating clogging and reducing the DOC’s efficiency.
  • Run a diagnostic scan
    • Fault codes can help identify whether the issue is related to the DOC itself or other components like sensors.
  • Check for underlying engine problems
    • Issues such as incomplete combustion or faulty injectors can increase soot production, putting extra strain on the DOC.
  • Consider professional cleaning
    • If the blockage is not severe, cleaning may restore proper flow and function.
  • Replace the DOC if necessary
    • If the filter is heavily clogged or damaged, replacement is often the most reliable solution.

Taking action early helps prevent additional strain on your engine and emissions system while avoiding more extensive repairs.

It is engineered for high-flow, high-temperature exhaust conditions typical of heavy-duty diesel and natural gas engines.

Yes, proper installation typically involves compatible clamps and gaskets to ensure a secure, leak-free connection.

By converting harmful exhaust gases early in the process, it helps the entire aftertreatment system meet strict emissions standards.

Using the correct OEM part ensures proper fitment, correct catalyst characteristics, and compatibility with the engine’s aftertreatment system design.

Cummins DOC Filters