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

Based on Mercedes-Benz EPC data and multiple verified aftermarket catalogs, part number A0009050914 (SNS1116) is a upstream NOx sensor used in Mercedes diesel SCR (AdBlue) systems, mainly on OM651 diesel engine platforms (compact cars, SUVs, vans, and Sprinter variants).

Confirmed applications include:

• Mercedes-Benz A-Class W176 / W177 diesel SCR variants
• Mercedes-Benz C-Class W205 diesel (C200d / C220d / C300d)
• Mercedes-Benz E-Class W213 diesel (E200d / E220d)
• Mercedes-Benz GLC X253 diesel SCR variants
• Mercedes-Benz S-Class W222 facelift diesel SCR variants
• Mercedes-Benz Sprinter W906 / W907 / W910 Euro 6 diesel SCR systems
• Vito / V-Class W447 diesel SCR variants

Fitment is strictly based on OE number matching:
A0009050914 / SNS1116 / AAA2082120000

Verified Cross-Reference

• Continental SNS1116 = Mercedes OE A0009050914 SCR NOx sensor assembly (xenons4u.co.uk)
• Widely used across OM651 / OM654 Mercedes diesel SCR systems (W205 / W213 / W447 / Sprinter) (autorrautomocion.com)
• Confirmed OEM replacement includes AAA2082120000 sensor module family (wagendass.com)

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 injects AdBlue (urea solution) into the exhaust stream to reduce NOx emissions and meet Euro 6 standards.

The SNS1116 module is typically used as an upstream (pre-SCR catalyst) NOx sensor, responsible for engine-out emissions monitoring and SCR dosing control.

Symptoms / Fault Codes

• Check engine light
• AdBlue / SCR system warning
• NOx sensor communication faults
• P2200 / P2201 / P229F type codes (xenons4u.co.uk)
• Limp mode / reduced engine power
• Increased emissions / failed SCR efficiency

OE / Part Numbers

• A0009050914
• SNS1116
• AAA2082120000
• Mercedes SCR NOx sensor family (OM651 / OM654 platforms)
• 5WK97377 / A3C0-series equivalents (depending on supplier revision)

FAQ

Is this sensor vehicle-specific?

Yes. Mercedes NOx sensors are ECU-coded. Even if connectors look identical, upstream and downstream sensors are not interchangeable.

Why do so many Mercedes models use this sensor?

Because Mercedes shares SCR architecture across OM651/OM654 engines used in A, C, E, GLC, S, Sprinter, and V-Class platforms.

Can aftermarket versions work?

Yes, but only if the exact SNS1116 calibration family matches. Wrong variants will trigger SCR faults or communication errors immediately.