Fitment

Based on OE cross-reference and aftermarket catalog data, this NOx sensor is used in Volkswagen Group diesel SCR (AdBlue) systems on MLB Evo / EA897 platform applications.

Fitment is strictly based on OE number matching: 4M0907807E / 5WK97261

Common system usage:

• VAG diesel SCR (AdBlue) emission systems
• MLB Evo platform NOx sensor configurations
• EA897 V6/V8 TDI diesel aftertreatment systems
• Upstream / downstream sensor positions depending on calibration

Technical Description

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

It is part of the SCR (Selective Catalytic Reduction) system and controls AdBlue injection to reduce emissions and maintain Euro 6 compliance.

Designed for high-temperature exhaust environments with continuous emissions monitoring capability.

Symptoms / Fault Codes

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

OE / Part Numbers

• 4M0907807E
• 5WK97261
• 4M0 907 807 E (format variant)

FAQ

Is this sensor vehicle-specific?

Yes. NOx sensors must match exact OE number. Even small suffix differences indicate different calibration or configuration.

Can similar sensors be used instead?

Not recommended. These sensors are ECU-calibrated and must match OE specification exactly.

Why is only “Audi” shown in the title?

Because only confirmed brand-level association is used in the title. No model-level assumptions are included to avoid incorrect fitment claims.