John Deere DEF Doser Injector : OEM RE555626
JOHN DEERE DEF DOSER INJECTOR : OEM RE555626
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, Tamerx DEF Doser Injector, Tamerx part number RE555626TX ( OEM Part Number RE555626 ). 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 | RE555626 |
| Additional OEM | RE555626, RM100341 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | |
| WEIGHT | 1.00 LBS |
SHIPPING OPTIONS
Ship Weight : 1.00 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 DEF Doser Injector (OEM RE555626) is built to deliver precise amounts of diesel exhaust fluid into the aftertreatment system, ensuring proper emissions control. Designed to John Deere’s factory specifications, this injector provides dependable operation and helps keep equipment compliant with emissions regulations. Its OEM design allows for an exact fit, making installation quick and hassle-free without modifications. Constructed from durable materials, it is capable of withstanding the harsh conditions of agricultural and industrial use. For reliable function and long service life, this DEF doser injector is the right replacement for your John Deere equipment.
PEOPLE ALSO ASKS | BLOG(S)
The John Deere DEF Doser Injector, part number RE555626, is a genuine OEM component designed for precise metering of Diesel Exhaust Fluid (DEF) into the Selective Catalytic Reduction (SCR) system. Manufactured by Bosch (cross-referenced as 0444043046), this injector ensures accurate dosing to optimize NOₓ reduction in the Denoxtronic 2.2 aftertreatment system.
This unit is commonly used in a wide array of John Deere models that require closed-loop DEF dosing, including:
- Tractors
- 8245R, 8270R, 8295R, 8320R/RT, 8345R/RT, 8370R/RT, 9370R, 9420R/X, 9470R/RT/X, 9520R/RT/X
- Loaders
- 824K, 844K
- Combines
- S650, S660, S670, S680, S685, S690, S760, S770, S780, S785, S790
- Other Equipment
- 370E Series, 410E Series, 460E Series, CP690 Cotton Picker, 1050K Dozer, 410E‑II, 460E‑II, and more
Product Highlights
- OEM Precision
- Delivers consistent DEF flow tailored to John Deere SCR system demands.
- Bosch Reliability
- Built to OEM specifications for durability and long-term parts confidence.
- Warranty Coverage
- Typically supported by a 1‑year or 1‑million‑mile warranty from various suppliers, ensuring dependable aftermarket support.
Ensuring smooth SCR operation, using OEM RE555626 keeps your John Deere equipment compliant and performing as intended. For best results, install with clean DEF and verify system operation post-install to avoid malfunction-related downtime. Let me know if you’d like this formatted for parts listings, service manuals, or internal guides!
A bad DEF (Diesel Exhaust Fluid) doser injector can cause emissions issues, dashboard warnings, and even engine derates if left unchecked. Here are the most common signs and testing methods to help you determine whether your injector is failing:
Common Symptoms of a Failing DEF Doser Injector
Look out for these warning signs:
- Dashboard DEF or Check Engine Lights
- Frequent alerts may indicate injector problems.
- Excessive White Smoke
- Caused by improper DEF spraying into the exhaust stream.
- Crystallized DEF Deposits
- White, chalky buildup around the injector nozzle suggests clogging.
- Reduced Fuel Efficiency
- Poor DEF dosing can affect combustion and mileage.
- Inconsistent NOx Readings
- Faulty injectors fail to deliver the proper DEF amount, triggering emissions issues.
How to Confirm if the Injector is Bad
- Scan for Fault Codes
- Use a diagnostic scanner to check for DEF-related codes like P20E8, P204F, or P207F.
- Perform a Visual Inspection
- Remove the injector and check for leaks, cracks, or heavy crystallization around the nozzle.
- Test the Spray Pattern
- With diagnostic software, run an active test. A healthy injector produces a fine, even mist. Any dripping, uneven spray, or no spray at all signals a problem.
- Check DEF Quality
- Low-quality or contaminated DEF can mimic injector failure, so always verify the fluid meets ISO 22241 standards.
If you notice recurring warning lights, crystallized deposits, or faulty spray patterns, it’s likely time to service or replace the DEF doser injector. Addressing the issue early can prevent costly damage to the SCR system and avoid unexpected downtime.
Improper installation can cause leaks, dosing errors, and system fault codes.
Professional technicians can typically replace it in one to two hours.
Ignoring codes can lead to failed regenerations, loss of performance, and costly repairs.
No, DEF injectors are designed as replacements and should not be reused once removed.
John Deere DEF Doser Injectors
