
Cummins X15 DOC Filter 2018-2021: OEM 5506559
CUMMINS X15 DOC FILTER 2018-2021: OEM 5506559

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 5506559RM-DOC-2 ( OEM Part Number 5506559 ). 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 X15, 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 | 5506559 |
| Additional OEM | 5506559 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490550575 |
| 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.
A critical component of the diesel exhaust aftertreatment system, the Cummins X15 DOC Filter 2018–2021 (OEM 5506559) is designed for compatibility with select Cummins X15 engine applications. This Diesel Oxidation Catalyst (DOC) filter works to reduce hydrocarbons and carbon monoxide within the exhaust stream before gases exit the vehicle. Manufactured to meet original equipment specifications, it provides reliable fitment and integration with the vehicle’s emissions system. Its durable construction is built to withstand the high temperatures and demanding operating conditions commonly found in heavy-duty diesel environments. Replacing a worn or restricted DOC filter with the OEM 5506559 helps maintain proper exhaust system operation and supports compliance with emissions regulations.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2018 | Cummins | X15 | ||||
| 2019 | Cummins | X15 | ||||
| 2020 | Cummins | X15 | ||||
| 2021 | Cummins | X15 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins X15 DOC Filter (Diesel Oxidation Catalyst), OEM 5506559, plays an important role in the emissions system used in many heavy-duty trucks from 2018 to 2021. Located near the beginning of the aftertreatment system, the DOC filter helps convert harmful gases in diesel exhaust before they move through other emissions components such as the Diesel Particulate Filter (DPF). Proper care can help extend the lifespan of this component and maintain reliable exhaust treatment.
Routine maintenance and attention to engine health are essential for protecting the DOC filter from excessive buildup and unnecessary wear.
Tips to Extend the Life of Your Cummins X15 DOC Filter
- Follow regular engine maintenance schedules
- Properly maintained engines produce cleaner exhaust, which helps reduce soot and residue entering the DOC.
- Keep the DPF system in good condition
- A functioning Diesel Particulate Filter helps limit excessive soot that could affect the DOC.
- Inspect the exhaust system periodically
- Checking for leaks, cracks, or loose connections helps maintain proper exhaust flow.
- Use high-quality fuel and maintain the fuel system
- Cleaner fuel helps minimize contaminants that may accumulate in emissions components.
- Respond quickly to diagnostic warnings
- Addressing fault codes early helps prevent additional strain on the aftertreatment system.
Why Preventive Care Matters
Taking steps to maintain the Cummins X15 DOC Filter OEM 5506559 helps ensure consistent exhaust treatment and supports the operation of the entire emissions system. Regular inspections and proper engine care can help extend the service life of this important component.
A Diesel Oxidation Catalyst (DOC) filter is responsible for converting harmful gases in a diesel engine’s exhaust into less harmful emissions. When the DOC filter becomes restricted or contaminated, the exhaust system may not function properly. Recognizing the signs early can help prevent further issues with the emissions system.
One of the first signs drivers may notice is a warning light on the dashboard. Since the DOC filter is part of the vehicle’s emissions system, onboard diagnostics can quickly detect when something is wrong.
Common signs of a bad DOC filter include:
- Check engine light
- related to the emissions system
- Excessive exhaust smoke
- compared to normal operation
- Strong or unusual exhaust odor
- from the tailpipe
- Restricted exhaust flow
- caused by internal buildup
- Diagnostic trouble codes
- linked to the exhaust aftertreatment system
Drivers may also notice changes in how the vehicle operates. When the DOC filter becomes clogged or contaminated, exhaust gases cannot move through the system as efficiently, which can affect overall engine operation.
If these symptoms appear, it’s best to run a diagnostic scan and inspect the exhaust system. Early detection can help prevent further damage and ensure the emissions system continues working as intended.
The OEM reference number 5506559 is used to confirm the proper component for the application.
OEM 5506559 refers to a diesel oxidation catalyst used in the Cummins X15 exhaust aftertreatment system.
Part number 5506559 falls under diesel oxidation catalyst components used in heavy-duty emissions systems.
The filter is designed to withstand high heat and constant exhaust flow from heavy-duty diesel engines.







