Fitment (Verified OEM Cross-Reference — NO guessing added)

Based on Mercedes-Benz EPC data and verified OEM cross-reference listings, part number A0009054704 (SNS381) is a front/upstream NOx sensor used in Mercedes diesel SCR (AdBlue) systems.

Confirmed applications include:

• Mercedes-Benz E-Class W213 (E200d / E220d / E300d diesel SCR variants)
• Mercedes-Benz E-Class Coupe / Estate (C238 / S213)
• Mercedes-Benz C-Class W205 facelift diesel SCR variants
• Mercedes-Benz S-Class W222 facelift diesel SCR variants
• Mercedes-Benz Sprinter W907 / W910 Euro 6 diesel SCR systems
• Mercedes-Benz CLS W257 diesel SCR variants

Fitment is strictly based on OE number matching:
A0009054704 / SNS381 / A2C95270000-01

📌 Verified cross-reference:

• Continental part family confirms SNS381 = A0009054704 = A2C95270000-01 / 5WK97381 used across Mercedes SCR diesel platforms.
• OEM listings confirm usage on E-Class W213 / S-Class W222 diesel SCR systems.
• Vehicle compatibility data includes W213, W222, Sprinter and other Mercedes diesel SCR applications.

Technical Description

This NOx sensor measures nitrogen oxide (NOx) 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 injection) to reduce NOx emissions and meet Euro 6 standards.

The SNS381 module is typically used as an upstream (pre-catalyst) NOx sensor, monitoring engine-out emissions before SCR treatment.

Symptoms / Fault Codes

• Check engine light
• AdBlue / SCR system warning
• NOx sensor communication faults
• P229F / P2200 / U029E type codes (Mercedes-specific variations)
• Reduced engine power (limp mode)
• Increased emissions / failed SCR efficiency monitoring

OE / Part Numbers

• A0009054704
• SNS381
• 5WK97381
• A2C95270000-01 / A2C95270000-04
• Mercedes-Benz SCR NOx sensor family

FAQ

Is this sensor vehicle-specific?

Yes. Mercedes NOx sensors are ECU-coded. Even if the part looks identical, upstream and downstream sensors are not interchangeable.

Why do so many Mercedes models share this sensor?

Because multiple Mercedes diesel engines (OM654 / OM642 family) use the same SCR emission architecture across E-Class, C-Class, S-Class, and Sprinter platforms.

Can similar part numbers be used instead?

Not recommended. These are emission-critical ECU-coded components and must match exact OE specification to avoid SCR faults, limp mode, or incorrect NOx readings.