Cummins ISX15 SCR Outlet Catalyst Module 2013-2017: OEM 4354172
Engineered NOx Reduction for Cummins ISX15 Engines (2013–2017)
What is it?
The Cummins ISX15 SCR Outlet Catalyst Module, identified by OEM 4354172, is a critical component of the Selective Catalytic Reduction (SCR) aftertreatment system. Installed near the outlet section of the exhaust assembly, it works with Diesel Exhaust Fluid (DEF) to convert nitrogen oxide (NOx) emissions into harmless nitrogen and water vapor before the exhaust exits the vehicle. This process helps the engine meet emissions standards while supporting the reliable operation of the complete aftertreatment system.
Why choose this SCR Outlet Catalyst Module?
A properly functioning SCR Outlet Catalyst Module is essential for maintaining efficient exhaust emissions treatment. The OEM 4354172 module is engineered specifically for Cummins ISX15 engines manufactured between 2013 and 2017, ensuring compatibility with factory-installed aftertreatment components.
Over time, prolonged exposure to high exhaust temperatures, DEF contamination, catalyst aging, and continuous heavy-duty operation can reduce the module's efficiency. When this occurs, operators may experience emissions warning lights, elevated NOx readings, diagnostic fault codes, or engine derate conditions. Replacing a worn catalyst module with the correct OEM-matched component helps restore effective exhaust treatment and supports dependable SCR system operation. Cummins service procedures also emphasize verifying SCR catalyst compatibility after replacement to ensure proper aftertreatment function.
Key Benefits
✅ OEM-matched SCR Outlet Catalyst Module for Cummins ISX15 engines (2013–2017)
✅ Helps convert harmful NOx emissions into nitrogen and water vapor
✅ Supports reliable operation of the complete aftertreatment system
✅ Helps maintain consistent exhaust flow and emissions efficiency
✅ Direct-fit design for straightforward installation
✅ Built for demanding heavy-duty commercial and vocational applications
Applications
This SCR Outlet Catalyst Module is designed for Cummins ISX15 diesel engines manufactured between 2013 and 2017. These engines are commonly used in heavy-duty trucks, commercial transportation fleets, vocational vehicles, and other demanding applications where reliable emissions control and dependable aftertreatment performance are essential.
Installation Notes
Before installation, allow the exhaust system to cool completely. Inspect the DEF injector, NOx sensors, temperature sensors, exhaust piping, clamps, and mounting hardware for contamination, wear, or damage. Install the replacement module using the appropriate seals and hardware to ensure proper alignment and a leak-free fit. After installation, verify all sensor connections, clear any stored diagnostic fault codes if necessary, and confirm proper operation of the aftertreatment system using compatible diagnostic equipment.
Final Thoughts
The SCR Outlet Catalyst Module is a vital component in maintaining efficient NOx reduction and dependable emissions system operation. The Cummins ISX15 SCR Outlet Catalyst Module (OEM 4354172) provides reliable fitment, effective exhaust treatment, and long-lasting durability for 2013–2017 Cummins ISX15-powered heavy-duty equipment operating in demanding environments.