
Cummins L9 DOC Filter 2018-2021: OEM 5506560
CUMMINS L9 DOC FILTER 2018-2021: OEM 5506560

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured Tamerx DOC Filter, Tamerx part number 5506560RM-DOC ( OEM Part Number 5506560 ). 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 L9, production years 2018-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: Inlet Catalyst
OEM NUMBERS
| Primary OEM | 5506560 |
| Additional OEM | 5506560 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490550599 |
| WEIGHT | 35.00 LBS |
SHIPPING OPTIONS
Ship Weight : 35.00 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.
Built for compatibility with 2018–2021 Cummins L9 engines, the Cummins L9 DOC Filter (OEM 5506560) is a vital component of the diesel exhaust aftertreatment system. This Diesel Oxidation Catalyst (DOC) filter works within the exhaust stream to reduce hydrocarbons and carbon monoxide before gases exit the vehicle. Manufactured to meet original equipment specifications, it is designed for proper fitment and dependable integration with the vehicle’s emissions components. The unit is constructed to withstand the high temperatures and demanding operating conditions commonly found in heavy-duty diesel applications. Replacing a worn or restricted DOC filter with the OEM 5506560 helps maintain proper exhaust system operation and supports compliance with emissions regulations.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2018 | Cummins | L9 | ||||
| 2019 | Cummins | L9 | ||||
| 2020 | Cummins | L9 | ||||
| 2021 | Cummins | L9 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins L9 DOC Filter (Diesel Oxidation Catalyst), OEM 5506560, is an essential component in the emissions system used in many Cummins L9 engines produced between 2018 and 2021. Its primary role is to begin the process of treating exhaust gases as they exit the engine, helping reduce harmful compounds before the gases move through the rest of the aftertreatment system.
Installed at the front of the exhaust aftertreatment assembly, the DOC filter uses a catalyst-coated internal structure that triggers chemical reactions when exhaust gases pass through it. These reactions help convert certain pollutants into less harmful substances.
Main Roles of the Cummins L9 DOC Filter 5506560
- Converts hydrocarbons (HC)
- found in diesel exhaust into carbon dioxide and water vapor
- Reduces carbon monoxide (CO)
- created during combustion
- Prepares exhaust gases for the Diesel Particulate Filter (DPF)
- Helps diesel engines meet emissions regulations
- for heavy-duty vehicles
- Maintains steady exhaust flow
- through the aftertreatment system
Because the DOC filter serves as the first stage in the emissions treatment process, it plays a critical role in ensuring that downstream components can operate effectively.
For vehicles equipped with Cummins L9 engines from 2018 to 2021, the OEM 5506560 DOC filter helps maintain proper emissions control and supports the reliable operation of the entire exhaust aftertreatment system.
A Diesel Oxidation Catalyst (DOC) filter is a critical part of a diesel vehicle’s emissions system. Its purpose is to convert harmful gases in the exhaust into less harmful compounds before they exit the tailpipe. When the DOC filter fails, it can lead to warning lights, emissions problems, and other exhaust system issues.
The most common cause of DOC filter failure is contamination of the catalyst surface. When certain substances enter the exhaust stream, they can coat the catalyst material and prevent it from properly treating exhaust gases.
Several factors can lead to this type of contamination, including:
- Excessive soot buildup
- from incomplete combustion
- Oil entering the exhaust system
- due to engine leaks or wear
- Coolant leaks
- that introduce harmful deposits into the exhaust
- Poor fuel quality
- that leaves residue on the catalyst
- Unburned fuel
- reaching the exhaust because of engine issues
Driving conditions can also contribute to DOC filter problems. Vehicles used primarily for short trips may not allow the exhaust system to reach temperatures high enough to burn off accumulated soot. Over time, this buildup can restrict exhaust flow and reduce the effectiveness of the DOC filter.
Routine maintenance and addressing engine issues early can help prevent contamination and extend the life of the DOC filter.
The catalyst helps convert hydrocarbons and carbon monoxide in the exhaust stream into less harmful byproducts.
The component is located near the beginning of the aftertreatment system connected to the engine’s exhaust outlet.
Medium-duty and heavy-duty commercial trucks equipped with Cummins L9 engines may use this filter.
Using the correct OEM number helps ensure the component fits the engine’s aftertreatment configuration.



