Fitment

Confirmed OE application based on OEM cross-reference data:

• Audi A4 B9 (8W) 2.0 TDI
• Audi A5 (F5) 2.0 TDI
• Audi Q5 (FY) 2.0 TDI
• Volkswagen Group diesel SCR (AdBlue) emission systems

Fitment is strictly based on OE number matching: 80A907807B / 5WK97415

Technical Description

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

It sends real-time data to the engine control unit (ECU) to manage SCR (Selective Catalytic Reduction) dosing strategy and ensure emissions compliance.

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

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

OE / Part Numbers

• 80A907807B
• 5WK97415

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. This unit is used in specific VAG diesel SCR applications.

Can similar NOx sensors be used instead?

No. NOx sensors are ECU-calibrated components and must match the exact OE specification.

What system is it used in?

It is used in Volkswagen Group diesel SCR (AdBlue) emission systems.