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John Deere Hydrocarbon Doser Unit : OEM RE542992

JOHN DEERE HYDROCARBON DOSER UNIT : OEM RE542992

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$497.50

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 RE542992
PART TYPE Hydrocarbon Doser Unit
BRAND Bosch
ENGINE MAKE John Deere
ENGINE TYPE
YEAR
PART NUMBER 0 444 031 001

PRODUCT DESCRIPTION

This is a Genuine New, Bosch Hydrocarbon Doser Unit, Bosch part number 0 444 031 001 ( OEM Part Number RE542992 ). 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 OEMRE542992
Additional OEMRE542992

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.


Inject precision into performance with the John Deere Hydrocarbon Doser Unit (OEM RE542992) — your smart solution for delivering the right amount of hydrocarbon to the aftertreatment system with rock-solid accuracy. Crafted to meet stringent OEM standards, this doser integrates seamlessly with your setup, offering durable reliability and dependable emissions control. Rugged and ready for action in any environment, it’s the no-fuss upgrade that keeps your John Deere engine clean, compliant, and operating at its best.

PEOPLE ALSO ASKS | BLOG(S)

Effective emissions control relies heavily on the Diesel Particulate Filter (DPF) regeneration process. In John Deere engines, the Hydrocarbon Doser Unit OEM RE542992 plays a crucial role by injecting a precise amount of fuel into the exhaust, helping raise temperature and facilitate soot burn-off. If this component begins to falter, you may experience DPF issues, warning lights, or reduced engine performance—making the right replacement vital for smooth, compliant operation.

Important Features of OEM RE542992 Hydrocarbon Doser Unit:

  • Controlled Fuel Injection: Delivers a measured amount of fuel during regeneration to raise exhaust temperatures efficiently and promote soot burn-off.

  • Supports DPF Performance: Restores proper regeneration function, reducing soot buildup and prolonging DPF service intervals.

  • Precision Engineering: Designed to meet John Deere specifications exactly for seamless integration and accurate operation.

  • Durable Construction: Built with quality materials to withstand high-temperature conditions typical during regeneration cycles.

  • Easy Replacement: Plug-and-play fit minimizes downtime and simplifies maintenance efforts.

  • OEM Reliability: Delivering factory-grade performance to maintain engine health and emissions standards.


A functioning hydrocarbon doser unit is essential for keeping your John Deere engine clean, efficient, and compliant. If you're seeing regeneration faults, DPF issues, or reduced performance, replacing the doser with the OEM RE542992 is a smart and reliable fix. Trust TamerX Diesel Parts for genuine OEM components that support long-term engine stability and emission system effectiveness.

The Hydrocarbon (HC) Doser Unit is essential in diesel aftertreatment systems, where it injects fuel into the exhaust stream to elevate temperatures for Diesel Particulate Filter (DPF) regeneration. Because it operates in high-heat, high-pressure environments, proper servicing and inspection are necessary to ensure long-term efficiency and prevent costly system failures.

Recommended Service and Inspection Intervals

  • Every 100,000 Miles (or as recommended by OEM)
    Many manufacturers recommend inspecting the HC doser unit every 100,000 miles. However, always refer to the specific service manual for your engine make and model.

  • During Scheduled DPF Service
    Since the HC doser directly supports DPF function, it’s common practice to inspect or clean the doser unit during scheduled DPF maintenance intervals.

  • After Fault Codes or Performance Symptoms
    If your engine shows DPF-related fault codes or poor regeneration performance, the HC doser could be the cause. Immediate inspection may be needed.

  • Visual Inspection Every 25,000–50,000 Miles
    For high-mileage or heavy-duty applications, visual inspection of the doser for clogging, leakage, or carbon buildup every 25,000–50,000 miles can prevent failure.

Why Regular Inspection Is Important

  • Prevents Incomplete Regeneration
    A clogged or failing HC doser can lead to insufficient temperatures for DPF regeneration, causing soot buildup and increased backpressure.

  • Reduces Fuel Waste
    Malfunctioning dosers may over-inject fuel or spray unevenly, leading to poor fuel economy and potential hydrocarbon emissions.

  • Protects Exhaust Components
    Excessive unburned fuel can damage the DOC (Diesel Oxidation Catalyst) and downstream filters if the doser malfunctions.

  • Avoids Costly Downtime
    Catching doser issues early minimizes the risk of breakdowns or forced derate conditions caused by exhaust aftertreatment failures.

Consistent inspection and servicing of the HC doser unit is key to maintaining your diesel engine’s aftertreatment health and operational efficiency. Follow manufacturer guidelines, tie inspections to DPF service intervals, and stay alert for any signs of malfunction. Preventative care today can help you avoid downtime, save on fuel costs, and extend the life of your emissions system.

Incorrect dosing can lead to poor emission control, system derating, or catalyst damage.

Dosing errors can immediately impair after-treatment function, triggering warning codes or altered engine behavior.

Over- or under-dosing can lead to inefficient emission treatment and potential system shutdown.

By delivering accurate hydrocarbon quantities, it enables effective after-treatment and keeps emissions within legal limits.

John Deere Hydrocarbon Doser Units

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