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Dodge Ram Cummins 6.7L DOC 2007-2010: OEM 52121891AF

DODGE RAM CUMMINS 6.7L DOC 2007-2010: OEM 52121891AF

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,695.00

CORE CHARGE:

$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 NUMBER52121891AF
PART TYPEDOC
BRANDTamerx Diesel Products
ENGINE MAKEDodge Ram
ENGINE TYPECummins 6.7L
YEAR2007-2010
PART NUMBER1891RM-DPF
APPLICATION NOTES3500, 4500 Cab Chassic

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx DOC, Tamerx part number 1891RM-DPF ( OEM Part Number 52121891AF ). 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 Dodge Ram Cummins 6.7L, production years 2007-2010, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM52121891AF
Additional OEM52121891AC, 52121891AD, 52121891AE, 52121891AF, 52121891AG

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490556409
WEIGHT44.00 LBS

SHIPPING OPTIONS

Ship Weight : 44.00 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.


Experience cleaner, more efficient exhaust treatment with the Dodge Ram Cummins 6.7L DOC 2007–2010 (OEM 52121891AF). Designed specifically for 2007–2010 Dodge Ram Cummins 6.7L engines, this diesel oxidation catalyst helps reduce harmful emissions by treating exhaust gases before they move through the aftertreatment system. Manufactured to meet OEM specifications, it provides precise fitment and dependable compatibility for the listed model years. Installing the correct DOC helps support consistent emissions control, proper exhaust flow, and reliable long-term performance.

FITMENT CHART

YEARMAKEENGINE(S)
2007Dodge Ram Cummins 6.7L
2008Dodge Ram Cummins 6.7L
2009Dodge Ram Cummins 6.7L
2010Dodge Ram Cummins 6.7L

PEOPLE ALSO ASKS | BLOG(S)

The Dodge Ram Cummins 6.7L DOC 2007-2010 OEM 52121891AF is an important part of the exhaust aftertreatment system, helping prepare exhaust gases before they enter the next stage of emissions control. Many diesel owners search for ways to keep their emissions system operating reliably, and using the correct OEM Diesel Oxidation Catalyst is one of the most important steps. A properly matched DOC supports efficient exhaust treatment while maintaining factory compatibility.

  • OEM 52121891AF is designed specifically for 2007-2010 Dodge Ram Cummins 6.7L applications, ensuring a precise fit with compatible exhaust systems.
  • Helps reduce harmful exhaust emissions by converting pollutants as exhaust gases pass through the catalyst.
  • Supports the efficiency of downstream aftertreatment components, helping create the proper conditions for the Diesel Particulate Filter (DPF) to function effectively.
  • Manufactured with durable catalytic materials that are designed to withstand continuous exposure to high exhaust temperatures.
  • Direct-fit OEM design helps simplify replacement, reducing installation concerns on compatible vehicles.
  • Maintains proper exhaust flow characteristics, supporting the overall balance of the emissions system.
  • Built for dependable, long-term operation, making it a reliable replacement for restoring the original function of your diesel aftertreatment system.

The Dodge Ram Cummins 6.7L DOC 2007-2010 OEM 52121891AF is a dependable choice for maintaining your truck's emissions system with an OEM-quality replacement. Its precise fit, durable construction, and essential role in exhaust gas treatment help support consistent aftertreatment operation and reliable performance throughout the life of your vehicle.

Diagnosing a bad Diesel Oxidation Catalyst (DOC) involves evaluating both its performance and the condition of the surrounding aftertreatment system. Since the DOC is responsible for reducing harmful exhaust gases and generating the heat needed for DPF regeneration, any loss in efficiency can affect overall emissions performance. A combination of diagnostic testing and physical inspection is the best way to identify the source of the problem.

  • Use a diagnostic scan tool to check for catalyst efficiency, exhaust temperature, or emissions-related fault codes.
  • Monitor live data from exhaust temperature sensors before and after the DOC to verify proper catalyst operation.
  • Inspect the DOC for contamination caused by oil, coolant, or excessive soot, which can reduce catalyst efficiency.
  • Check for exhaust leaks, loose clamps, or damaged pipes that may affect exhaust flow and sensor readings.
  • Review DPF regeneration history, as repeated or failed regenerations can indicate poor DOC performance.
  • Measure exhaust backpressure to determine whether restrictions are limiting exhaust flow.
  • Inspect related components such as fuel injectors, temperature sensors, differential pressure sensors, and the turbocharger to rule out other causes of aftertreatment problems.

Diagnosing a bad DOC requires a complete inspection of both the catalyst and the supporting emissions system. Identifying the root cause early helps restore aftertreatment performance, improve engine efficiency, and prevent unnecessary replacement of other components.

Yes, prolonged exposure to moisture, road salt, and harsh environments can corrode the housing or exhaust connections. Routine inspections help identify corrosion before it becomes severe.

Keeping the fuel system, air intake, and turbocharger in good condition helps reduce exhaust contamination. Following the manufacturer's maintenance schedule also supports long-term DOC performance.

Yes, constant vibration can loosen mounting hardware or damage the catalyst housing over time. Inspecting the exhaust system periodically helps prevent these issues.

Inspecting the exhaust system helps identify leaks, damaged pipes, or loose connections that may affect DOC performance. Correcting these issues helps maintain proper exhaust flow.