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

• Mercedes-Benz Actros (SCR Euro 6 diesel variants)
• Mercedes-Benz Arocs / Antos heavy-duty trucks
• Detroit Diesel / Daimler truck engine platforms with SCR systems
• Freightliner / Western Star / Daimler commercial vehicles (SCR-equipped systems depending on calibration)

Using reference numbers:

• 5WK97403 (Continental/VDO sensor family cross-reference)
• A0101538128 (Mercedes-Benz OEM reference number)
• Related SCR NOx sensor system variants depending on ECU configuration

This sensor is part of the exhaust aftertreatment system used to monitor nitrogen oxide (NOx) levels and regulate AdBlue/DEF dosing for emissions compliance.

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

Q2: Where is it installed?
A2: It is installed in the SCR exhaust system, typically upstream or downstream of the catalytic converter depending on engine configuration.

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

Q4: Is 5WK97403 the same as A0101538128?
A4: Yes, A0101538128 is the OEM Mercedes-Benz number and 5WK97403 is the supplier cross-reference for the same NOx sensor unit.