
Cummins L9 DOC Filter 2022-2024: OEM 4394695
CUMMINS L9 DOC FILTER 2022-2024: OEM 4394695

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 102-0272RM-DOC-4 ( OEM Part Number 4394695 ). 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 2022-2024, 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 | 4394695 |
| Additional OEM | 4394695 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490549968 |
| 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.
The OEM 4394695 DOC Filter is designed for 2022–2024 Cummins L9 engine applications and serves as a critical component in the exhaust aftertreatment system. This Diesel Oxidation Catalyst (DOC) converts harmful exhaust gases into less harmful compounds before they continue through the downstream DPF and SCR assemblies. Built to original equipment specifications, it ensures precise fitment and reliable compatibility with factory-installed sensors and mounting hardware. Its durable construction is engineered to withstand high exhaust temperatures and the demanding conditions of commercial vehicle operation. As a direct OEM replacement, this Cummins L9 DOC Filter helps maintain the integrity of the aftertreatment system while reducing the likelihood of unexpected downtime. Tamerx Diesel Products LLC supplies dependable diesel emissions components that align with strict manufacturer standards for long-term reliability.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2022 | Cummins | L9 | ||||
| 2023 | Cummins | L9 | ||||
| 2024 | Cummins | L9 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins L9 DOC Filter 2022–2024 (OEM 4394695) is a Diesel Oxidation Catalyst (DOC) used in the aftertreatment system of Cummins L9 diesel engines. This component, often referred to as an inlet catalyst module, is installed near the front of the exhaust system where it begins the process of reducing harmful emissions.
Its main purpose is to treat exhaust gases immediately after they exit the engine. As exhaust flows through the DOC, oxidation reactions convert pollutants such as hydrocarbons and carbon monoxide into less harmful compounds before the gases move through the rest of the emissions system.
Key Characteristics of OEM 4394695
- Designed specifically for Cummins L9 engines produced between 2022 and 2024
- Functions as an inlet catalyst module in the aftertreatment system
- Reduces harmful exhaust pollutants before they reach downstream components
- Installed at the front of the emissions control assembly
- Built to OEM specifications for proper fit and durability
Inside the DOC is a catalyst-coated honeycomb structure that creates a large surface area for chemical reactions. As hot exhaust gases pass through this structure, the catalyst converts pollutants into less harmful substances, allowing the remaining emissions system components to work effectively.
In simple terms, the Cummins L9 DOC Filter (OEM 4394695) is a critical emissions control component that helps 2022–2024 Cummins L9 engines meet environmental standards while supporting the proper operation of the entire aftertreatment system.
Taking care of your DOC (Diesel Oxidation Catalyst) filter begins with maintaining the engine systems that influence exhaust quality. Because the DOC processes exhaust gases, problems such as poor combustion or fluid leaks can introduce contaminants that shorten its lifespan.
Consistent maintenance and attentive driving habits help reduce soot buildup and protect the catalyst material inside the filter.
To properly care for your DOC filter:
- Use high-quality diesel fuel to reduce residue and deposits
- Follow recommended oil change intervals
- Use manufacturer-approved engine oil and fluids
- Repair faulty fuel injectors promptly
- Fix oil or coolant leaks before they reach the exhaust system
- Avoid excessive idling whenever possible
- Address check engine or emissions warning lights right away
Driving conditions also affect DOC health. Frequent short trips that prevent the engine from reaching normal operating temperature can lead to soot accumulation. Allowing the vehicle to reach proper exhaust temperatures helps maintain effective catalyst operation.
Regular inspections of sensors, exhaust connections, and related components can identify minor issues early. Staying proactive with maintenance and timely repairs helps ensure your DOC filter continues functioning properly and reduces the risk of unexpected failures.
It is an inlet catalyst module in the diesel oxidation catalyst system that converts harmful exhaust gases into less harmful substances.
It belongs to the diesel oxidation catalyst category used in heavy-duty diesel exhaust systems.
It promotes oxidation reactions that convert hydrocarbons and carbon monoxide in the exhaust stream.
It is located near the front of the aftertreatment system where exhaust gases first enter emissions processing.



