Fitment

Confirmed OE application based on catalog cross-reference:

• Volkswagen Group diesel vehicles with SCR (AdBlue) emission systems
• Volkswagen Touareg (CR platform variants depending on engine code)
• Porsche Cayenne (Diesel variants with VAG 3.0 TDI engine family)

Fitment is strictly based on OE number matching: 04L907805AB / 5WK97265A

Technical Description

This NOx sensor is used in diesel exhaust aftertreatment systems to measure nitrogen oxide (NOx) concentration in exhaust gases.

It sends real-time data to the ECU to manage SCR (Selective Catalytic Reduction) dosing strategy, ensuring proper AdBlue injection control and emissions compliance.

The sensor is an integrated electronic module used in modern diesel emission systems.

Symptoms / Fault Codes

Common symptoms of failure may include:

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

OE / Part Numbers

• 04L907805AB
• 5WK97265A

FAQ

What does this NOx sensor do?

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

Is this sensor vehicle-specific?

Yes. Compatibility is strictly determined by OE number matching only.

Can similar NOx sensors be interchangeable?

Not recommended. Even small OE differences often indicate different calibration or ECU compatibility.

Which systems use this sensor?

It is used in Volkswagen Group diesel SCR (AdBlue) emission systems, including certain Volkswagen and Porsche diesel applications.