
John Deere Hydrocarbon Doser Unit : OEM RE556831
JOHN DEERE HYDROCARBON DOSER UNIT : OEM RE556831

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine New, Bosch Hydrocarbon Doser Unit, Bosch part number 0 444 033 009 ( OEM Part Number RE556831 ). 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 | RE556831 |
Additional OEM | RE556831 |
ADDITIONAL DETAILS
CONDITION | Genuine New |
UPC / Barcode | |
WEIGHT | 2.00 LBS |
SHIPPING OPTIONS
Ship Weight : 2.00 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 John Deere Hydrocarbon Doser Unit (OEM RE556831) is a critical emissions component designed to deliver precise fuel dosing for the regeneration process in the aftertreatment system. By ensuring accurate fuel delivery, it supports reliable system performance and helps maintain compliance with emissions regulations. Built to John Deere’s factory standards, this doser unit provides a direct fit for straightforward installation with no modifications required. Its durable construction is engineered to handle demanding agricultural and industrial environments while delivering long-lasting dependability. For keeping your John Deere equipment running efficiently and within emissions standards, this OEM doser unit is a trusted replacement.
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The Hydrocarbon Doser Unit, OEM part RE556831, is a critical component used in diesel aftertreatment systems to precisely deliver hydrocarbons into the exhaust stream for active regeneration in diesel particulate filters (DPFs). It’s manufactured by Bosch (part number 0 444 033 009) and meets rigorous OEM standards of fit, reliability, and functionality.
Key Highlights
- OEM Quality from Bosch
- Part RE556831 aligns with factory-spec standards and ensures drop-in compatibility with John Deere diesel systems.
- Warranty Backing
- Typically comes with a “One Million Miles or One Year” replacement warranty and includes all necessary gaskets and seals for installation.
- Cross-Reference Numbers
- Also referenced under Bosch numbers 0 444 033 008 and 0 444 033 009 for extensive compatibility outside of DE-coded systems.
- Ease of Installation
- Offered brand-new and genuine with no core return required, streamlining the replacement process.
Replacing the OEM RE556831 Hydrocarbon Doser Unit with a genuine Bosch component ensures accurate dosing functionality and long-term emissions system reliability. For optimal performance, always match part numbers carefully, include all necessary hardware during installation, and verify system calibration as part of routine service procedures. Let me know if you'd like help formatting this for service bulletins, catalog entries, or internal technical documentation.
A Hydrocarbon Doser Unit (also called an HC doser injector or fuel doser) is a critical component in modern diesel engines equipped with aftertreatment systems designed to meet strict emissions standards. Its main job is to inject a small, controlled amount of diesel fuel or hydrocarbons into the exhaust stream to aid in regeneration of the Diesel Particulate Filter (DPF) and sometimes assist the Selective Catalytic Reduction (SCR) system.
Primary Function
The hydrocarbon doser unit sprays fuel directly into the exhaust system upstream of the Diesel Oxidation Catalyst (DOC). When the injected fuel burns, it raises the exhaust temperature, which is necessary to clean and maintain the DPF and support proper emissions reduction.
Key Roles of a Hydrocarbon Doser Unit
- Supports DPF Regeneration
- Increases exhaust temperatures to burn off soot collected in the filter.
- Assists Emission Control
- Ensures optimal conditions for the SCR and DOC systems to work effectively.
- Precise Fuel Delivery
- Works with the Engine Control Module (ECM) to inject the exact amount of fuel needed based on operating conditions.
- Prevents System Damage
- Helps avoid filter overloading and costly aftertreatment failures.
Without a functioning hydrocarbon doser unit, the DPF cannot regenerate properly, leading to soot buildup, reduced fuel efficiency, warning lights, and potential engine derates. Regular inspection and cleaning can help extend its lifespan and prevent expensive repairs.
Signs include failed regenerations, fault codes, increased emissions, and reduced engine performance.
It should be replaced when clogged, leaking, or unable to deliver fuel correctly.
Yes, a failed doser may trigger engine derates to protect emissions compliance.
Yes, if the doser cannot spray fuel properly, the DPF will not regenerate and may clog.