International N13 SCR 2018-2021: OEM 5418526

Engine-Matched NOx Control for International N13 Engines (2018–2021)

What is it?
The International N13 SCR (Selective Catalytic Reduction) assembly, identified by OEM part number 5418526, is an emissions aftertreatment component used on 2018–2021 N13 diesel engines. The SCR system works with Diesel Exhaust Fluid (DEF) to facilitate a chemical reaction that converts nitrogen oxides (NOx) in the exhaust into nitrogen and water before the gases exit the system, helping maintain regulated emissions behavior.

Why choose this SCR Assembly?
This SCR module is designed to meet International/Navistar’s original specifications for the N13 engine platform, ensuring accurate fitment and reliable interaction with DEF dosing hardware, exhaust sensors, and control systems. In integrated emissions systems, consistent SCR function is essential to supporting coordinated aftertreatment performance. Using the correct OEM-specified unit helps sustain predictable emissions control and avoids inconsistent exhaust responses.

Key Benefits
✅ Engine-matched design for International N13 aftertreatment systems
✅ Supports dependable NOx conversion with DEF chemistry
✅ Helps maintain coordinated operation with related emissions parts
✅ Direct-fit replacement — no modifications required
✅ Built for durability in heavy-duty exhaust environments

Applications
This SCR assembly is suited for medium- and heavy-duty trucks and commercial vehicles powered by International/Navistar N13 diesel engines manufactured between 2018 and 2021. Typical applications include on-highway freight haulers, regional carriers, vocational equipment, and other commercial platforms where emissions control and system coordination are critical.

Installation Notes
Allow the exhaust and aftertreatment components to cool fully before servicing. Remove the existing SCR module and inspect nearby DEF lines, sensors, and mounting hardware for wear, soot buildup, or damage. Install the replacement SCR assembly with proper seals and fasteners to ensure a secure, leak-free fit. After installation, clear any stored fault codes and verify correct SCR behavior using appropriate diagnostic tools.

Final Thoughts
If your International N13-powered vehicle is displaying NOx-related warnings, erratic emissions readings, or inconsistent aftertreatment behavior, replacing the SCR module with the correct OEM-specified unit can help restore stable emissions control. The International N13 SCR (OEM 5418526) plays a key role in managing exhaust chemistry and supporting reliable engine operation.