FITMENT
Compatible with Cummins diesel engines equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include:

• Cummins ISX / ISB / X-series diesel engines (depending on emission calibration)
• Heavy-duty trucks and commercial vehicles using SCR aftertreatment systems
• EPA / Euro 5 / Euro 6 emission control systems

Using reference numbers:

• 4984577
• 5WK96620B (Continental/Bosch sensor family cross-reference)

Typically installed in SCR exhaust aftertreatment systems for NOx emission monitoring and AdBlue dosing control.

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 control AdBlue/DEF injection and reduce emissions.

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

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

Q4: Is 4984577 interchangeable across Cummins engines?
A4: It is a common Cummins SCR NOx sensor reference, but exact compatibility depends on engine model, ECU calibration, and emission standard.