Loading...

John Deere Hydrocarbon Doser Unit : OEM RE542996

JOHN DEERE HYDROCARBON DOSER UNIT : OEM RE542996

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$479.95

CORE CHARGE:

$50.00
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 NUMBER RE542996
PART TYPE Hydrocarbon Doser Unit
BRAND Bosch
ENGINE MAKE John Deere
ENGINE TYPE
YEAR
PART NUMBER 0 444 031 002

PRODUCT DESCRIPTION

This is a Genuine New, Bosch Hydrocarbon Doser Unit, Bosch part number 0 444 031 002 ( OEM Part Number RE542996 ). 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 OEMRE542996
Additional OEMRE538860, RE542996

ADDITIONAL DETAILS

CONDITIONGenuine New
UPC / Barcode
WEIGHT2.00 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.


Drive precision and clean performance into your engine with the John Deere Hydrocarbon Doser Unit (OEM RE542996) — your go-to for flawless hydrocarbon dosing that keeps emissions in check and efficiency on point. Built to exacting OEM standards, this robust unit offers seamless compatibility, rugged dependability, and unwavering performance under any operating condition. Ready for plug-and-play installation, it’s the dependable upgrade that ensures your John Deere runs cleaner, smarter, and stronger.

PEOPLE ALSO ASKS | BLOG(S)

A smoothly operating Diesel Particulate Filter (DPF) system is foundational for maintaining engine cleanliness and emissions compliance. Central to this process is the hydrocarbon doser unit, which carefully injects fuel into the exhaust stream to initiate DPF regeneration. The OEM RE542996 Hydrocarbon Doser Unit is specifically engineered for John Deere applications, ensuring accurate dosing and consistent regeneration cycles.

Key Features of the OEM RE542996 Hydrocarbon Doser Unit:

  • Precision Fuel Injection for DPF Regeneration
    Delivers the exact amount of fuel needed to raise exhaust temperature and effectively burn off soot.

  • Engineered for John Deere Compatibility
    Matches OEM specifications for reliable fit, calibration, and performance.

  • Build Quality for Harsh Conditions
    Constructed from durable, heat-resistant materials designed to endure repeated regeneration cycles.

  • Plug-and-Play Replacement
    Simplifies maintenance—easily integrates into existing systems without complex modifications.

  • Minimizes Downtime and Cost
    A direct OEM replacement helps prevent failed regenerations and keeps your engine running efficiently.


When your DPF regeneration process begins to falter, the hydrocarbon doser unit could be the key component at fault. The John Deere OEM RE542996 Hydrocarbon Doser Unit restores accurate fuel dosing, enabling clean and efficient exhaust regeneration. Trusted for quality and performance, TamerX Diesel Parts brings you the OEM-grade solutions needed to keep your engine running smoothly and compliant.

The Hydrocarbon (HC) Doser Unit is a vital part of the diesel aftertreatment system. It injects fuel into the exhaust stream to raise the temperature, allowing the Diesel Particulate Filter (DPF) to regenerate properly. However, like many emission-related components, the HC doser is exposed to extreme conditions and can fail over time. Understanding the root causes of failure helps prevent system damage and costly repairs.

Common Causes of HC Doser Unit Failure

  • Carbon and Soot Buildup
    Over time, unburned hydrocarbons and soot can accumulate on the tip of the injector, leading to clogging. This buildup restricts flow and can eventually block the injector completely.

  • Fuel Contamination
    Dirty or contaminated diesel fuel can damage the internal components of the doser unit. Rust, water, or debris in the fuel system may lead to injector wear or failure.

  • Faulty Electrical Connections
    The doser relies on precise signals from the engine control module (ECM). Corroded connectors or broken wiring can interrupt communication, causing the doser to operate erratically or not at all.

  • Thermal Stress and Cracking
    The doser unit operates in high-heat environments. Repeated heating and cooling cycles can cause thermal fatigue, potentially leading to cracking or warping of the housing or injector tip.

  • Overuse or Improper Regeneration Cycles
    Excessive or improper DPF regenerations can overwork the doser unit. If the system initiates regeneration too frequently due to upstream sensor issues or backpressure, the doser may degrade prematurely.

  • Injector Seal Leaks
    Worn or damaged seals can allow fuel to leak, affecting both injector performance and surrounding components. Leaks can also lead to failed emissions tests.

Hydrocarbon doser unit failure is typically preventable with proper maintenance and attention to fuel quality. Regular inspection during DPF service, using clean fuel, and monitoring for signs like poor fuel economy, fault codes, or failed regens can help extend the life of the doser. Replacing fuel filters on schedule and addressing system alerts early are essential steps in avoiding costly downtime and emissions system failure.

The dosing nozzle should be inspected periodically and cleaned of any hardened deposits to keep dosing precise.

Gently flush the dosing tip and internal channels with a recommended solvent to dissolve and clear residue.

When dosing levels are off, after-treatment systems may report faults or exhibit reduced emission control.

Incorrect dosing can lead to poor emission control and potential engine derate or catalyst damage.

John Deere Hydrocarbon Doser Units

PRODUCT VIDEOS