Urea Pump Assembly 1409391

BG 203038 (OE 1409391): function on the vehicle

Urea Pump Assembly 1409391 is supplied by BEST GROWTH under part number 203038, cross-referenced to OE 1409391, as a direct-fit aftermarket def pumps. In service it draws diesel exhaust fluid from the tank, builds and regulates system pressure, and returns fluid during the purge cycle. Filter condition, pressure stability and heater function drive service life.

BG 203038 is built to the position defined by its OE application in truck service on the platform from DAF. Position, calibration and connector layout are part of the specification, so a part that physically fits is not automatically the correct part.

DEF quality is the single largest driver of pump life. Fitting a new pump into a contaminated tank simply repeats the failure.

Fitment for DAF and OE cross reference

BG 203038 replaces 13 OE references: 1409391, 1705244, 1612308, 1138505, 4931694, 5273338, 2T2131113B, 5273338, 1409391 and 1705244, covering cross applications. Always confirm the number printed on the removed part, including any supersession issued by the vehicle manufacturer.

Recorded vehicle coverage for 203038 includes DAF, typically on DAF; CF65 / LF45 / LF55. 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 1409391 and quoting the number on your part lets our technical team confirm the variant before despatch.

Symptoms that lead to replacing 1409391

These complaints bring a vehicle in with the DAF def pumps under suspicion. None of them prove BG 203038 has failed on its own, which is why the checks below matter before a replacement is ordered.

• pressure decay immediately after the pump stops
• pressure too low or unable to build pressure
• long priming time after a tank refill
• frozen-line faults in cold-climate operation
• repeated dosing interruptions during a drive cycle

Checks before fitting BG 203038

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

• Inspect the DEF filter and tank strainer for contamination and crystallisation.
• Verify heater circuit and coolant valve operation before winter service.
• Confirm DEF concentration with a refractometer; contaminated fluid destroys the pump.
• Check suction and pressure lines for kinks and crystallised blockage.
• Test pressure build-up time and decay against the manufacturer's limits.

Quality, packaging and ordering 203038

BG 203038 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 1409391 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 203038 replace OE 1409391?

Yes. BG 203038 is listed against 1409391, 1705244, 1612308, 1138505, 4931694, 5273338, 2T2131113B and 5273338. Confirm the number printed on the removed part and any manufacturer supersession before ordering.

Which vehicles does BG 203038 fit?

Recorded coverage includes DAF. It is supplied as a direct-fit aftermarket def pumps. Adaptation, reset or relearn procedures required by the vehicle manufacturer still apply after installation.

Does this fault code always mean the def pumps 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 203038.