Fitment

Based on OEM cross-reference data, 03N907807E is used across Volkswagen Group diesel SCR (AdBlue) systems on MQB / EA288-era platforms.

Common applications include:

• Škoda Superb III 2.0 TDI (selected EA288 diesel variants)
• Volkswagen Passat B8 2.0 TDI (EA288 platform)
• Volkswagen Arteon 2.0 TDI diesel
• SCR (AdBlue) emission systems with EA288 exhaust architecture

Fitment is strictly based on OE number matching: 03N907807E / 5WK97444

OE cross-reference data confirms this part is shared across VW / Škoda / SEAT / Audi Group diesel platforms in the EA288 SCR system family.

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 and controls AdBlue dosing strategy to reduce emissions and meet Euro 6 standards.

The sensor is an integrated electronic module designed for high-temperature exhaust environments and continuous emissions monitoring.

Symptoms / Fault Codes

Common symptoms of failure may include:

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

OE / Part Numbers

• 03N907807E
• 5WK97444
• Continental / Vitesco reference family: A2C39364300-03 (SNS444)

FAQ

What does this NOx sensor do?

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

Which vehicles use this part?

It is commonly used in Volkswagen Passat B8, Arteon, and Škoda Superb III diesel applications depending on engine configuration.

Is this sensor vehicle-specific?

Yes. It is strictly matched by OE number. Even small suffix differences (E / Q / AC variants) can indicate different ECU calibration or mounting position.

Can similar NOx sensors be used instead?

Not recommended. NOx sensors are ECU-calibrated components and must match exact OE specification.