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

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

Reference / cross numbers:

• 5WK97105A / 5WK9 7105A
• Cummins SCR NOx sensor platform (application-specific depending on ECU mapping)

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 dosing and reduce emissions.

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

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

Q4: Is 5WK97105A interchangeable across Cummins engines?
A4: It may fit multiple SCR configurations, but exact compatibility depends on engine model, emission standard, and ECU calibration.