Fitment

Fits for:

• Caterpillar mini excavators and compact construction equipment (select SCR-equipped applications)
• Example models: CAT 300.9D and related 300-series mini excavators
• Engine: Diesel emissions SCR / AdBlue system applications
• Position: Exhaust NOx sensor (inlet or outlet depending on configuration)
• OE Numbers: 372-1186 / 5WK96633B / 372-1186-01

FAQ

Q1: Is this compatible with all CAT 300 series machines?
A1: No, compatibility depends on exact engine model, emissions system, and sensor position.

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

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

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