Urea (AdBlue) Dosing Module for Magirus-Deutz / Renault Trucks / Volvo FH/FM – OE 0 444 023 043

BG 205026 (OE 0 444 023 043): function on the vehicle

Urea (AdBlue) Dosing Module for Magirus-Deutz / Renault Trucks / Volvo FH/FM – OE 0 444 023 043 is supplied by BEST GROWTH under part number 205026, cross-referenced to OE 0 444 023 043, as a direct-fit aftermarket def dosing modules. In service it meters DEF under pump pressure through a solenoid injector into the hot exhaust pipe, with a cooling circuit or heat shield keeping the injector body below its thermal limit between doses.

BG 205026 is built to the position defined by its OE application in truck service on platforms from Renault Trucks and Volvo. Position, calibration and connector layout are part of the specification, so a part that physically fits is not automatically the correct part.

A dosing module rarely fails alone. Deposits are usually evidence of a temperature or mixing problem that will destroy the replacement unless it is corrected.

Fitment for Renault Trucks and Volvo and OE cross reference

BG 205026 replaces 8 OE references: 0 444 023 043, 7421738120, 7421161863, 7421738122, 21161863, 21234242, 21738122 and 04907957. Always confirm the number printed on the removed part, including any supersession issued by the vehicle manufacturer.

Recorded vehicle coverage for 205026 includes Renault Trucks and Volvo, typically on Magirus-Deutz|Renault Trucks|Volvo FH/FM. 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 0 444 023 043 and quoting the number on your part lets our technical team confirm the variant before despatch.

Symptoms that lead to replacing 0 444 023 043

These complaints bring a vehicle in with the Renault Trucks and Volvo def dosing modules under suspicion. None of them prove BG 205026 has failed on its own, which is why the checks below matter before a replacement is ordered.

• audible ticking absent during a commanded dose
• 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

Checks before fitting BG 205026

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

• Review exhaust temperature history — cold-side dosing wets the wall and forms deposits.
• 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.

Quality, packaging and ordering 205026

BG 205026 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 0 444 023 043 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 205026 replace OE 0 444 023 043?

Yes. BG 205026 is listed against 0 444 023 043, 7421738120, 7421161863, 7421738122, 21161863, 21234242, 21738122 and 04907957. Confirm the number printed on the removed part and any manufacturer supersession before ordering.

Which vehicles does BG 205026 fit?

Recorded coverage includes Renault Trucks and Volvo. 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 205026.