FITMENT
Compatible with Mercedes-Benz heavy-duty diesel vehicles and buses equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include:

• Mercedes-Benz Actros
• Mercedes-Benz Axor
• Mercedes-Benz bus and coach platforms (selected Euro 5 / Euro 6 systems)
• Some Daimler commercial chassis used in international bus configurations
  Using reference numbers:
• A0081539928
• A0081539004
• 5WK96652B (Continental/Bosch sensor family cross-reference)

This NOx sensor is part of the SCR exhaust aftertreatment system for emissions control and AdBlue dosing regulation.

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide (NOx) levels in the exhaust system and sends real-time data to the ECU to regulate AdBlue/DEF injection and reduce emissions.

Q2: Where is it installed?
A2: It is installed in the SCR exhaust system, typically before or after the catalytic converter depending on vehicle or bus configuration.

Q3: What are symptoms of failure?
A3: Check engine light, SCR/AdBlue system warnings, NOx sensor fault codes, reduced engine power, or limp mode activation.

Q4: Are these part numbers interchangeable?
A4: Yes, A0081539928 / A0081539004 are OEM references and 5WK96652B is the sensor manufacturer cross-reference for the same SCR NOx sensor unit.