Fitment

Confirmed application based on OE catalog cross-reference:

• Volkswagen Touareg 7P 3.0 TDI (CNRB engine)
• SCR (AdBlue) diesel emission systems
• Front / upstream NOx sensor position (before SCR catalyst)

Fitment is based strictly on OE number matching.

Technical Description

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

It transmits real-time data to the ECU to control SCR (Selective Catalytic Reduction) dosing strategy and maintain emissions compliance.

Typically installed in the exhaust stream upstream of the SCR catalyst depending on system configuration.

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

• 8K0907807P
• 8K0907807K (cross reference in some catalog systems)

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.

Is this part vehicle-specific?

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

Where is it installed?

It is used in the upstream position of the SCR exhaust aftertreatment system in selected Volkswagen Touareg and related VAG diesel applications.

Can similar NOx sensors be interchangeable?

Not recommended. Even small OE differences may indicate different ECU calibration or system configuration.