Fitment

Compatible with Volkswagen Group diesel vehicles equipped with EA288 / MLB EVO diesel engines and SCR (Selective Catalytic Reduction) emission systems.

Common applications include Audi and Volkswagen diesel platforms using this NOx sensor configuration:

• 80A907807N
• SNS415B
• A2C18271000-01
• Audi A4 / A5 / Q5 2.0 TDI (MLB EVO platform)
• Volkswagen Group SCR / AdBlue diesel systems

Fitment depends on engine code and ECU calibration (upstream/downstream position varies by vehicle).

Technical Description

This NOx sensor is installed in the diesel exhaust aftertreatment system to measure nitrogen oxide concentration in real time.

It sends data to the engine control unit (ECU) to regulate SCR system dosing strategy and ensure emissions compliance.

The sensor includes an integrated control module and communicates via CAN bus to the vehicle ECU.

Symptoms / Fault Codes

Common symptoms of a failing NOx sensor may include:

• Check engine light
• P2200 / P229F fault codes (system dependent)
• SCR / AdBlue system warning
• Reduced engine performance / limp mode
• Increased emissions and fuel consumption

OE / Part Numbers

• 80A907807N
• SNS415B
• A2C18271000-01
• Related family: 80A907807 series (fitment varies by revision and ECU software)

FAQ

What does a NOx sensor do?

It measures nitrogen oxide levels in diesel exhaust gases and sends data to the ECU for SCR emission control.

Where is it used?

It is used in Audi and Volkswagen 2.0 TDI diesel engines with SCR/AdBlue systems, typically on MLB EVO platforms.

Is 80A907807N interchangeable with SNS415B variants?

Not always. Even if the connector and housing are similar, compatibility depends on ECU calibration and sensor revision.

What happens if it fails?

It may trigger emission warnings, fault codes, and reduced engine performance depending on SCR system strategy.