Fitment

Compatible with Volkswagen diesel vehicles equipped with 2.0 TDI engines and SCR (Selective Catalytic Reduction) emission systems.

This part number is used in Volkswagen diesel exhaust aftertreatment systems for nitrogen oxide monitoring and emission control.

• 04L907805EK
• Volkswagen 2.0 TDI engine applications
• SCR / AdBlue diesel emission systems

Technical Description

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

It provides real-time data to the ECU to support emission control strategies in SCR systems and diesel aftertreatment operation.

Symptoms / Fault Codes

Common symptoms of a failing NOx sensor may include:

• Check engine light
• P2200 / P229F fault codes (system dependent)
• SCR system warning
• Reduced engine performance
• Emission system malfunction

OE / Part Numbers

• 04L907805EK

FAQ

What does a NOx sensor do?

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

Where is it used?

It is used in diesel vehicles with SCR emission systems to monitor exhaust gas before or after the catalytic converter.

What happens if it fails?

It may cause emission system warnings, fault codes, and reduced engine performance depending on the vehicle system.

Does it require coding after replacement?

Some vehicles may require ECU adaptation or coding depending on system configuration.