
Cummins B6.7 DOC Filter 2022-2024: OEM 4394769
CUMMINS B6.7 DOC FILTER 2022-2024: OEM 4394769

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 102-176RM-DOC ( OEM Part Number 4394769 ). 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 B6.7, 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 | 4394769 |
| Additional OEM | 4394769 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490550032 |
| 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 specifically for 2022–2024 Cummins B6.7 engine applications, the OEM 4394769 DOC Filter plays an important role in maintaining proper exhaust aftertreatment function and emissions compliance. This Diesel Oxidation Catalyst (DOC) helps convert harmful exhaust gases into less harmful compounds before they move through the downstream DPF and SCR system. Manufactured to original equipment specifications, it provides precise fitment and dependable compatibility with factory-installed sensors and mounting hardware. Its rugged construction is designed to withstand high exhaust temperatures and the demanding conditions of commercial vehicle operation. Serving as a direct OEM replacement, this Cummins B6.7 DOC Filter helps maintain the reliability of the aftertreatment system while reducing the likelihood of unexpected downtime. Tamerx Diesel Products LLC offers dependable diesel emissions components that meet strict manufacturer standards.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2022 | Cummins | B6.7 | ||||
| 2023 | Cummins | B6.7 | ||||
| 2024 | Cummins | B6.7 | ||||
PEOPLE ALSO ASKS | BLOG(S)
Positioned at the front of the aftertreatment system, the Cummins B6.7 DOC Filter 2022–2024 (OEM 4394769) plays an important role in controlling diesel exhaust emissions. As a Diesel Oxidation Catalyst (DOC), its main role is to treat exhaust gases immediately after they leave the engine.
The DOC initiates oxidation reactions that convert harmful pollutants into less harmful compounds before the exhaust moves through downstream components such as the Diesel Particulate Filter (DPF) and other emissions systems. By reducing pollutants at the beginning of the process, it helps the entire aftertreatment system function efficiently.
Main Role of OEM 4394769
- Converts carbon monoxide into carbon dioxide
- Breaks down unburned hydrocarbons in the exhaust stream
- Generates heat needed to support DPF regeneration
- Prepares exhaust gases for downstream emissions treatment
- Helps maintain compliance with emissions regulations
Because it operates as the first stage of emissions treatment, the DOC directly affects the performance of the components that follow. A properly functioning unit helps maintain steady exhaust flow and supports reliable aftertreatment system operation.
For 2022–2024 Cummins B6.7 engines, the OEM 4394769 DOC filter ensures proper compatibility with factory-calibrated emissions systems while supporting consistent exhaust treatment and system reliability.
What Is the Main Cause of DOC Filter Failure?
The main cause of DOC (Diesel Oxidation Catalyst) filter failure is contamination within the exhaust system. When substances like soot, oil, coolant, or unburned fuel reach the DOC, they coat the catalyst surface and prevent it from processing exhaust gases properly. Over time, this buildup restricts exhaust flow and can damage the filter.
Most contamination problems originate from underlying engine issues. If these concerns are not addressed quickly, the DOC filter can become clogged or experience internal deterioration.
Common causes of DOC filter failure include:
- Excessive soot from incomplete combustion
- Faulty fuel injectors allowing unburned fuel into the exhaust
- Oil entering the exhaust due to worn engine components
- Coolant leaks contaminating the catalyst material
- Poor fuel quality leaving heavy deposits
- Prolonged idling that prevents proper exhaust temperatures
Thermal stress can also contribute to DOC damage. Sudden temperature spikes inside the exhaust system may crack or degrade the internal catalyst structure.
Routine maintenance and quick attention to warning lights can help prevent DOC filter failure. Addressing engine concerns early helps protect the exhaust system and reduce the risk of costly repairs.
The module typically uses a ceramic catalyst substrate within a durable housing designed for high-temperature exhaust flow.
It operates in sequence with emissions components such as the diesel particulate filter and SCR catalyst.
It performs the initial catalytic stage that prepares exhaust gases for further treatment downstream.
This catalyst module is commonly used in heavy-duty trucks and diesel equipment equipped with Cummins B6.7 engines.






