NOx Sensor 227906850R

BG 201862 (OE 227906850R): function on the vehicle

NOx Sensor 227906850R is supplied by BEST GROWTH under part number 201862, cross-referenced to OE 227906850R, as a direct-fit aftermarket nox sensors. In service it runs a heated zirconia measuring cell inside its own sensor control module, converts the raw cell current into a NOx value in ppm, and publishes it on the bus. The engine controller cannot calculate dosing quantity or conversion efficiency without a plausible signal from it.

BG 201862 is built to the position defined by its OE application on a 12V electrical system in passenger car service on platforms from Peugeot, Citroën and Renault. Position, calibration and connector layout are part of the specification, so a part that physically fits is not automatically the correct part.

Fitting position matters as much as the part number: upstream and downstream references often share a housing but carry different calibration data and cable lengths.

Fitment for Peugeot, Citroën and Renault and OE cross reference

BG 201862 replaces 1 OE reference: 227906850R. Always confirm the number printed on the removed part, including any supersession issued by the vehicle manufacturer.

Recorded vehicle coverage for 201862 includes Peugeot, Citroën and Renault, typically on Megane / Scenic 1.5 dCi 2020-. Coverage lists are a starting point for identification, not a substitute for checking the OE number on the vehicle.

Quote the number printed on your part with the engine code when you enquire; a single-reference part is the most common source of ordering errors when a platform received a mid-life update.

Symptoms that lead to replacing 227906850R

These complaints bring a vehicle in with the Peugeot and Citroën nox sensors under suspicion. None of them prove BG 201862 has failed on its own, which is why the checks below matter before a replacement is ordered.

• SCR efficiency below threshold or NOx-signal-implausible fault codes
• DEF over-consumption with no visible leak
• torque derate or speed inducement with a full, in-spec DEF tank
• no communication with the sensor control module after a cold start
• sensor value frozen at a fixed number once the exhaust warms up

Checks before fitting BG 201862

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

• Verify DEF concentration with a refractometer before blaming the measuring cell.
• Check for a pending software or parameter update for the sensor control module on that platform.
• After fitting, run the manufacturer's adaptation or relearn so stored efficiency counters reset.
• Compare upstream and downstream NOx readings warmed and under load — idle values prove nothing.
• Confirm supply voltage, ground quality and bus termination before condemning the sensor module.

Quality, packaging and ordering 201862

BG 201862 is manufactured and tested to aftermarket replacement standards, with electrical, leakage and functional testing carried out before packing on the 12V specification. Bulk and retail packaging, private-label cartons and customer-specific labelling are available for distributors and workshop groups.

Send OE 227906850R 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 201862 replace OE 227906850R?

Yes. BG 201862 is listed against 227906850R. Confirm the number printed on the removed part and any manufacturer supersession before ordering.

Which vehicles does BG 201862 fit?

Recorded coverage includes Peugeot, Citroën and Renault. It is supplied as a direct-fit aftermarket nox sensors on 12V systems. Adaptation, reset or relearn procedures required by the vehicle manufacturer still apply after installation.

Does this fault code always mean the nox sensors 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 201862.