FITMENT
Compatible with Caterpillar heavy-duty diesel engines and equipment equipped with SCR (Selective Catalytic Reduction) aftertreatment systems requiring NOx monitoring.
Common applications include:

• Caterpillar industrial diesel engines
• Construction machinery (excavators, loaders, generators, etc.)
  Using reference: 441-5128-04 / 4415128 / A2C10474800-1268

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 DEF/AdBlue dosing and reduce emissions.

Q2: Where is it installed?
A2: It is installed in the exhaust aftertreatment system, typically before or after the SCR catalyst depending on equipment configuration.

Q3: What are symptoms of failure?
A3: Fault codes, engine warning light, SCR/DEF system errors, reduced engine performance, or machine derating.

Q4: Is it compatible with all Caterpillar engines?
A4: No, compatibility depends on engine model, emission standard (Tier 4 / Euro stage), and SCR system design.