Fitment (Market-Validated Usage)

Based on OEM catalog data, Continental/Vitesco SNS950 documentation, and aftermarket verified listings, this NOx sensor is used in Renault–Nissan–Fiat–Mercedes shared diesel SCR (AdBlue) systems, mainly on 2.0 dCi / M9R platform vehicles.

Common system applications include:

• Renault Trafic III 2.0 dCi (Euro 6 SCR)
• Renault Master III 2.3 dCi (selected SCR variants)
• Nissan NV300 2.0 dCi
• Fiat Talento 2.0 EcoJet
• Mercedes-Benz X-Class 2.3 dCi (shared platform variants)

Fitment is strictly based on OE number matching:
227904120R / SNS950 / A2C18787800-02

OE cross-reference data confirms this is a Continental/Vitesco SNS950 NOx sensor used across multiple OEM platforms sharing the 2.0 dCi SCR architecture.

Aftermarket catalog data consistently maps this OE number to Renault Trafic III / Fiat Talento / Nissan NV300 SCR systems.

Technical Description

This NOx sensor measures nitrogen oxide concentration in diesel exhaust gases and sends real-time data to the ECU.

It is part of the SCR (Selective Catalytic Reduction) system, which uses AdBlue (urea solution) to reduce NOx emissions and maintain Euro 6 compliance.

The sensor is designed for high-temperature exhaust environments with integrated electronics and continuous CAN communication.

Symptoms / Fault Codes

• Check engine light
• SCR / AdBlue system warning
• NOx sensor signal / communication faults
• P2200 / P229F type codes (system dependent)
• Reduced engine power (limp mode)
• Increased emissions

OE / Part Numbers

• 227904120R
• SNS950
• A2C18787800-02
• Nissan / Renault / Fiat / Mercedes shared SCR sensor family

FAQ

Is this sensor vehicle-specific?

Yes. NOx sensors must match the exact OE number. Even small suffix differences (120R / 063R / 461R variants) can change calibration, connector type, or mounting configuration.

Why do multiple brands appear in fitment?

Because Renault–Nissan–Fiat–Mercedes share the same 2.0 dCi SCR platform architecture, so the same NOx sensor is used across multiple vehicles.

Can similar OE numbers be used instead?

Not recommended. These are ECU-calibrated emission components and must match exact OE specification to avoid SCR faults or limp mode.