Does BG 990516 replace OE 46335939?

Yes. BG 990516 is listed against 46335939. Confirm the number printed on the removed part and any manufacturer supersession before ordering.

Which vehicles does BG 990516 fit?

Recorded coverage includes FCA. 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 990516.

990516

NOx Sensor 46335939

BG NOx sensor for FCA Ducato Bus (250) 2.2D / 2.3D, OE 46335939, 12V urea/SCR system.

BG Part Number: 990516
Category: NOx Sensors
Application: Ducato Bus (250) 2.2D / 2.3D
Voltage: 12V
Vehicle Manufacturer: FCA

Applications

OE Cross References

46335939

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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 FCA Ducato Bus (250) 2.2D / 2.3D. It is a direct-fit replacement for OE reference 46335939. Rated for 12V 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 990516 (OE 46335939): function on the vehicle

NOx Sensor 46335939 is supplied by BEST GROWTH under part number 990516, cross-referenced to OE 46335939, as a direct-fit aftermarket nox sensors. In service it acts as the closed-loop feedback element of the SCR circuit: it tells the controller how much NOx is still leaving the catalyst, so dosing is trimmed up or down instead of running to a fixed map.

BG 990516 is built to the position defined by its OE application on a 12V electrical system in light commercial vehicle and bus service on the platform from FCA. 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 FCA and OE cross reference

BG 990516 replaces 1 OE reference: 46335939. Always confirm the number printed on the removed part, including any supersession issued by the vehicle manufacturer.

Recorded vehicle coverage for 990516 includes FCA, typically on Ducato Bus (250) 2.2D / 2.3D. 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 46335939

These complaints bring a vehicle in with the FCA nox sensors under suspicion. None of them prove BG 990516 has failed on its own, which is why the checks below matter before a replacement is ordered.

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
torque derate or speed inducement with a full, in-spec DEF tank
no communication with the sensor control module after a cold start

Checks before fitting BG 990516

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

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.
Inspect the harness for heat damage and the connector for moisture and green corrosion.

Quality, packaging and ordering 990516

BG 990516 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 46335939 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 990516 replace OE 46335939?: Yes. BG 990516 is listed against 46335939. Confirm the number printed on the removed part and any manufacturer supersession before ordering.
Which vehicles does BG 990516 fit?: Recorded coverage includes FCA. 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 990516.