
John Deere DOC : OEM RE566858
JOHN DEERE DOC : OEM RE566858

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, Tamerx DOC, Tamerx part number 118-0061 ( OEM Part Number RE566858 ). This part is primarily made for a John Deere , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | RE566858 |
| Additional OEM | 3185V01C, 82174862, RE547749, RE554699, RE558949, RE566858, RE567056, REXF122015470 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | 00840490539235 |
| WEIGHT | 44.00 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.
Designed for compatible John Deere engine applications, the OEM RE566858 Diesel Oxidation Catalyst (DOC) is manufactured to meet original equipment specifications for proper fit and dependable aftertreatment operation. This DOC functions within the exhaust system to convert hydrocarbons and carbon monoxide into less harmful emissions before gases move downstream. Constructed with durable catalyst materials and a robust housing, it is engineered to withstand high exhaust temperatures and demanding agricultural or industrial environments. Proper DOC operation is essential for maintaining emissions compliance and supporting overall exhaust system efficiency. Tamerx Diesel Products LLC offers this John Deere DOC as a reliable solution for consistent aftertreatment system performance.
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Emissions compliance and efficient exhaust treatment are essential in modern diesel equipment. The John Deere DOC OEM RE566858 plays a critical role in reducing harmful exhaust gases before they move further through the aftertreatment system.
A Diesel Oxidation Catalyst (DOC) is designed to chemically convert pollutants produced during combustion. Instead of trapping soot like a DPF, the DOC uses a catalyst-coated substrate to trigger oxidation reactions as exhaust gases pass through it.
The John Deere DOC RE566858 is important because it:
- Converts carbon monoxide into carbon dioxide
- Oxidizes unburned hydrocarbons into water vapor and carbon dioxide
- Reduces exhaust odor
- Helps raise exhaust temperatures
- Supports proper operation of downstream components
One of its most critical functions is heat generation. The oxidation process increases exhaust temperature, which is necessary for supporting regeneration in systems equipped with a Diesel Particulate Filter. Without sufficient heat, soot removal in the DPF can be less effective.
If the DOC becomes contaminated or damaged, it may lead to reduced emissions efficiency, warning indicators, or downstream aftertreatment complications.
The OEM RE566858 DOC is engineered specifically for compatible John Deere engines, ensuring proper fitment and integration within the exhaust system. Maintaining a properly functioning DOC helps support emissions compliance, cleaner exhaust output, and reliable equipment operation.
The Diesel Oxidation Catalyst (DOC) is a key component in your exhaust aftertreatment system. When it begins to fail, it can affect emissions control and overall exhaust efficiency. Recognizing the symptoms early can help prevent further damage.
One of the most common signs is an illuminated check engine or aftertreatment warning light. Fault codes related to catalyst efficiency often point to DOC concerns.
Other warning signs include:
- Failed emissions testing
- Strong or unusual exhaust odor
- Increased exhaust temperatures
- Reduced fuel efficiency
- Rattling noise from the exhaust housing
- Persistent catalyst efficiency codes after clearing
Internal contamination is a frequent cause of trouble. Oil or coolant entering the exhaust system can coat the catalyst surface and reduce its effectiveness.
Overheating can also damage the internal substrate. If the catalyst structure cracks or melts, exhaust flow may become restricted, which can impact engine operation.
Because sensor failures can sometimes mimic DOC issues, proper diagnosis is important. A technician will review temperature readings, pressure data, and stored fault codes to confirm whether the DOC itself is failing.
Addressing the issue early can help prevent more extensive exhaust system damage.
Yes, RE566858 is an original equipment diesel oxidation catalyst built to John Deere specifications.
The RE566858 DOC initiates the oxidation of carbon monoxide and hydrocarbons in the exhaust gas.
The RE566858 DOC is positioned in the exhaust path ahead of downstream emissions treatment components.
The RE566858 DOC is designed to be serviced or replaced independently when needed.



