Does BG 201010 replace OE 4326863?

Yes. BG 201010 is listed against 4326863 and 5WK9 6765A. Confirm the number printed on the removed part and any manufacturer supersession before ordering.

Which vehicles does BG 201010 fit?

Recorded coverage includes Cummins. It is supplied as a direct-fit aftermarket nox sensors on 24V 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 201010.

201010

NOx Sensor 4326863

BG NOx sensor for CUMMINS ISX / ISZ Engines (24V), OE 4326863 / 5WK9 6765A, 24V urea/SCR system.

BG Part Number: 201010
Category: NOx Sensors
Application: ISX / ISZ Engines (24V)
Voltage: 24V
Vehicle Manufacturer: CUMMINS

OE Cross References

4326863
5WK9 6765A· cross

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Product Description

This BG NOx (nitrogen oxide) sensor is designed for the urea/AdBlue-based SCR (Selective Catalytic Reduction) emissions system on CUMMINS ISX / ISZ Engines (24V). It is a direct-fit replacement for OE reference 4326863 / cross reference 5WK9 6765A. Rated for 24V electrical systems. The sensor provides accurate real-time NOx measurement for precise urea dosing control, helping maintain stable SCR performance and compliance with diesel emission standards.

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 201010 (OE 4326863): function on the vehicle

NOx Sensor 4326863 is supplied by BEST GROWTH under part number 201010, cross-referenced to OE 4326863, as a direct-fit aftermarket nox sensors. In service it measures nitrogen-oxide concentration and residual oxygen in the exhaust stream and reports both values to the aftertreatment controller over the vehicle data bus. Upstream and downstream readings together set DEF dosing quantity and score SCR conversion efficiency.

BG 201010 is built to the position defined by its OE application on a 24V electrical system on the platform from Cummins. Position, calibration and connector layout are part of the specification, so a part that physically fits is not automatically the correct part.

Cable length and connector keying are part of the specification. A cell with correct electrical output but the wrong lead length will not route to the OE bracket.

Fitment for Cummins and OE cross reference

BG 201010 replaces 2 OE references: 4326863 and 5WK9 6765A, covering cross applications. Always confirm the number printed on the removed part, including any supersession issued by the vehicle manufacturer.

Recorded vehicle coverage for 201010 includes Cummins, typically on ISX / ISZ Engines (24V). 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 4326863 and quoting the number on your part lets our technical team confirm the variant before despatch.

Symptoms that lead to replacing 4326863

These complaints bring a vehicle in with the Cummins nox sensors under suspicion. None of them prove BG 201010 has failed on its own, which is why the checks below matter before a replacement is ordered.

dosing shut-down after a few minutes of steady-state running
upstream and downstream values reading almost identically under load
intermittent fault that clears after the engine cools and returns when hot
SCR efficiency below threshold or NOx-signal-implausible fault codes
DEF over-consumption with no visible leak

Checks before fitting BG 201010

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

Read the sensor's own dew-point release time — a cell that never heats is a supply or module fault.
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.

Quality, packaging and ordering 201010

BG 201010 is manufactured and tested to aftermarket replacement standards, with electrical, leakage and functional testing carried out before packing on the 24V specification. Bulk and retail packaging, private-label cartons and customer-specific labelling are available for distributors and workshop groups.

Send OE 4326863 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 201010 replace OE 4326863?: Yes. BG 201010 is listed against 4326863 and 5WK9 6765A. Confirm the number printed on the removed part and any manufacturer supersession before ordering.
Which vehicles does BG 201010 fit?: Recorded coverage includes Cummins. It is supplied as a direct-fit aftermarket nox sensors on 24V 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 201010.