Does BG 205146 replace OE 208S400Q0C?

Yes. BG 205146 is listed against 208S400Q0C and 160728750R. Confirm the number printed on the removed part and any manufacturer supersession before ordering.

Which vehicles does BG 205146 fit?

Recorded coverage includes Renault, Nissan and Opel. 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 205146.

205146

Urea (AdBlue) Dosing Module for Nissan NV300 / Primastar Renault Espace / Koleos / Laguna / Latitude /... – OE 208S400Q0C

Urea (AdBlue) Dosing Module (OE 208S400Q0C) for Nissan NV300 / Primastar Renault Espace / Koleos / Laguna / Latitude / Master / Megane / Scenic / Trafic / Vel Satis SCR/AdBlue aftertreatment systems. Cross-referenced with 1 alternate OE number.

BG Part Number: 205146
Category: DEF Dosing Modules
Application: Nissan NV300 / Primastar Renault Espace / Koleos / Laguna / Latitude / Master / Megane / Scenic / Trafic / Vel Satis
Vehicle Manufacturer: RENAULT / NISSAN / OPEL

Applications

OE Cross References

208S400Q0C
160728750R

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Product Description

This urea (adblue) dosing module is designed as a direct-fit replacement for Nissan NV300 / Primastar Renault Espace / Koleos / Laguna / Latitude / Master / Megane / Scenic / Trafic / Vel Satis. 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: 208S400Q0C. It also cross-references to OE/aftermarket numbers including 160728750R. 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 205146 (OE 208S400Q0C): function on the vehicle

Urea (AdBlue) Dosing Module for Nissan NV300 / Primastar Renault Espace / Koleos / Laguna / Latitude /... – OE 208S400Q0C is supplied by BEST GROWTH under part number 205146, cross-referenced to OE 208S400Q0C, 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 205146 is built to the position defined by its OE application in passenger car and light commercial vehicle service on platforms from Renault, Nissan and Opel. 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 Renault, Nissan and Opel and OE cross reference

BG 205146 replaces 2 OE references: 208S400Q0C and 160728750R. Always confirm the number printed on the removed part, including any supersession issued by the vehicle manufacturer.

Recorded vehicle coverage for 205146 includes Renault, Nissan and Opel, typically on Nissan NV300 / Primastar Renault Espace / Koleos / Laguna / Latitude / Master / Megane / Scenic / Trafic / Vel Satis. 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 208S400Q0C and quoting the number on your part lets our technical team confirm the variant before despatch.

Symptoms that lead to replacing 208S400Q0C

These complaints bring a vehicle in with the Renault and Nissan def dosing modules under suspicion. None of them prove BG 205146 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 205146

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

Confirm the purge cycle completes at shutdown; skipped purges cause freeze damage.
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.

Quality, packaging and ordering 205146

BG 205146 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 208S400Q0C 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 205146 replace OE 208S400Q0C?: Yes. BG 205146 is listed against 208S400Q0C and 160728750R. Confirm the number printed on the removed part and any manufacturer supersession before ordering.
Which vehicles does BG 205146 fit?: Recorded coverage includes Renault, Nissan and Opel. 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 205146.