Does BG 205123 replace OE 0444043045?

Yes. BG 205123 is listed against 0444043045 and RE560468. Confirm the number printed on the removed part and any manufacturer supersession before ordering.

Which vehicles does BG 205123 fit?

Recorded coverage includes Bosch and John Deere. It is supplied as a direct-fit aftermarket def dosing modules. Adaptation, reset or relearn procedures required by the vehicle manufacturer still apply after installation.

Does this fault code always mean the def dosing modules has failed?

No. Exhaust leaks, wiring and connector damage, reductant quality, dosing performance and upstream engine faults can all produce the same codes. Validate those inputs before replacing BG 205123.

205123

Urea (AdBlue) Dosing Module for John Deere Tractor / Combine / Excavator – OE 0444043045

Urea (AdBlue) Dosing Module (OE 0444043045) for John Deere Tractor / Combine / Excavator SCR/AdBlue aftertreatment systems. Cross-referenced with 1 alternate OE number.

BG Part Number: 205123
Category: DEF Dosing Modules
Application: John Deere Tractor|Combine|Excavator
Vehicle Manufacturer: Bosch|John Deere

Applications

OE Cross References

0444043045
RE560468

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Product Description

This urea (adblue) dosing module is designed as a direct-fit replacement for John Deere Tractor / Combine / Excavator. It meters precise doses of AdBlue / Diesel Exhaust Fluid (DEF) into the exhaust stream as part of the vehicle's Selective Catalytic Reduction (SCR) aftertreatment system, converting NOx emissions into harmless nitrogen and water vapor to help the engine meet its emission standard. Primary OE reference number: 0444043045. It also cross-references to OE/aftermarket numbers including RE560468. Manufactured by BG Brand (Wenzhou Best Growth IE Co., Ltd.) to OE-equivalent fit, form and function, this part is tested for reliable sealing and dosing accuracy, offering fleets, workshops and parts distributors a quality-assured alternative to OEM pricing for scheduled SCR system maintenance and repair.

Vehicle manufacturer names, logos and OE reference numbers are used for identification and compatibility purposes only. BEST GROWTH products are independent aftermarket products and are not manufactured, sponsored or endorsed by the respective vehicle manufacturers.

BG 205123 (OE 0444043045): function on the vehicle

Urea (AdBlue) Dosing Module for John Deere Tractor / Combine / Excavator – OE 0444043045 is supplied by BEST GROWTH under part number 205123, cross-referenced to OE 0444043045, as a direct-fit aftermarket def dosing modules. In service it atomizes diesel exhaust fluid into the exhaust stream ahead of the SCR catalyst. Spray quality, dosing quantity and purge behaviour decide whether urea converts to ammonia or builds solid deposits.

BG 205123 is built to the position defined by its OE application in agricultural machinery and construction equipment service on platforms from Bosch and John Deere. Position, calibration and connector layout are part of the specification, so a part that physically fits is not automatically the correct part.

Seal and gasket condition at the exhaust interface is part of the repair: a leaking joint cools the spray zone and promotes crystallisation.

Fitment for Bosch and John Deere and OE cross reference

BG 205123 replaces 2 OE references: 0444043045 and RE560468. Always confirm the number printed on the removed part, including any supersession issued by the vehicle manufacturer.

Recorded vehicle coverage for 205123 includes Bosch and John Deere, typically on John Deere Tractor|Combine|Excavator. Coverage lists are a starting point for identification, not a substitute for checking the OE number on the vehicle.

Where several OE numbers appear against one BG reference, they are supersessions or regional variants of the same specification. Ordering by 0444043045 and quoting the number on your part lets our technical team confirm the variant before despatch.

Symptoms that lead to replacing 0444043045

These complaints bring a vehicle in with the Bosch and John Deere def dosing modules under suspicion. None of them prove BG 205123 has failed on its own, which is why the checks below matter before a replacement is ordered.

deposits inside the mixer restricting exhaust flow
white urea crystallisation around the dosing point or mixer
low dosing pressure or pressure-build-up fault codes
SCR low-conversion codes with confirmed in-spec DEF
coolant or DEF weeping at the module interface

Checks before fitting BG 205123

Aftertreatment faults are usually system faults. Working through these checks prevents a repeat failure after the new def dosing modules is fitted.

Check the cooling circuit or heat shield is intact before fitting a replacement.
Clean or replace the mixer if crystallisation is already established, or the new module will block too.
Verify commanded versus actual dosing pressure during an active dose, not at rest.
Run a quantity test and inspect the spray pattern rather than judging the injector by appearance.
Confirm the purge cycle completes at shutdown; skipped purges cause freeze damage.

Quality, packaging and ordering 205123

BG 205123 is manufactured and tested to aftermarket replacement standards, with electrical, leakage and functional testing carried out before packing. Bulk and retail packaging, private-label cartons and customer-specific labelling are available for distributors and workshop groups.

Send OE 0444043045 or the number printed on your part, the engine code and the vehicle identification number with your enquiry, and our technical team will confirm the correct reference, current stock position and lead time before you commit to an order.

Frequently asked questions

Does BG 205123 replace OE 0444043045?: Yes. BG 205123 is listed against 0444043045 and RE560468. Confirm the number printed on the removed part and any manufacturer supersession before ordering.
Which vehicles does BG 205123 fit?: Recorded coverage includes Bosch and John Deere. It is supplied as a direct-fit aftermarket def dosing modules. Adaptation, reset or relearn procedures required by the vehicle manufacturer still apply after installation.
Does this fault code always mean the def dosing modules has failed?: No. Exhaust leaks, wiring and connector damage, reductant quality, dosing performance and upstream engine faults can all produce the same codes. Validate those inputs before replacing BG 205123.