Urea (AdBlue) Dosing Module for AUDI Audi A4–A8; Q5/Q7 TDI PORSCHE CAYENNE (92A) 3.0 Diesel SEAT Alhambra... – OE 3C0131113

BG 205081 (OE 3C0 131 113 C): function on the vehicle

Urea (AdBlue) Dosing Module for AUDI Audi A4–A8; Q5/Q7 TDI PORSCHE CAYENNE (92A) 3.0 Diesel SEAT Alhambra... – OE 3C0131113 is supplied by BEST GROWTH under part number 205081, cross-referenced to OE 3C0 131 113 C, as a direct-fit aftermarket def dosing modules. In service it is the final actuator of the SCR loop: whatever the controller calculates from the NOx signal is only delivered as accurately as this module sprays it.

BG 205081 is built to the position defined by its OE application in passenger car and light commercial vehicle service on platforms from Vw group, Audi, Volkswagen, SEAT, Škoda and Porsche). 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 Vw group, Audi and Volkswagen and OE cross reference

BG 205081 replaces 10 OE references: 3C0 131 113 C, 3C0131113, 3C0 131 113 A, 3C0131113A, 3C0131113B, 3C0 131 113 B, 3C0 131 113 D, 3C0131113C, 3C0131113D and 0 444 021 021. Always confirm the number printed on the removed part, including any supersession issued by the vehicle manufacturer.

Recorded vehicle coverage for 205081 includes Vw group, Audi, Volkswagen, SEAT, Škoda and Porsche), typically on AUDI Audi A4–A8; Q5/Q7 TDI PORSCHE CAYENNE (92A) 3.0 Diesel SEAT Alhambra 2.0 TDI / 4Drive SKODA Yeti 2.0 TDI VW Caddy/Crafter/Passat/CC/Sharan/Touareg TDI. 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 3C0 131 113 C and quoting the number on your part lets our technical team confirm the variant before despatch.

Symptoms that lead to replacing 3C0 131 113 C

These complaints bring a vehicle in with the Vw group and Audi def dosing modules under suspicion. None of them prove BG 205081 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 205081

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

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

Quality, packaging and ordering 205081

BG 205081 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 3C0 131 113 C 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 205081 replace OE 3C0 131 113 C?

Yes. BG 205081 is listed against 3C0 131 113 C, 3C0131113, 3C0 131 113 A, 3C0131113A, 3C0131113B, 3C0 131 113 B, 3C0 131 113 D and 3C0131113C. Confirm the number printed on the removed part and any manufacturer supersession before ordering.

Which vehicles does BG 205081 fit?

Recorded coverage includes Vw group, Audi, Volkswagen and SEAT. 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 205081.