Fitment

Fits for:

• Caterpillar diesel engines (select SCR-equipped applications)
• Engine models: C4.4 / C7.1 / C9.3 / C13 / C15 / C18 (where equipped)
• Generator sets and industrial equipment (select emissions systems)
• Emissions system: SCR / AdBlue system applications
• Position: Exhaust NOx sensor (inlet or outlet depending on configuration)
• OE Numbers: 5WK96723A / 359-9173-02 / 359-9173

FAQ

Q1: Is this compatible with all Caterpillar engines listed?
A1: No, compatibility depends on engine configuration and SCR emissions system setup.

Q2: Where is it installed?
A2: It is installed in the exhaust system to measure nitrogen oxide levels for emissions control.

Q3: Are these part numbers interchangeable?
A3: Yes, they are cross reference numbers used for the same application depending on configuration.

Q4: What does this sensor monitor?
A4: It monitors nitrogen oxide concentration in the exhaust to support SCR system operation.