Navistar DOC : OEM 2603960C91

Emissions System Dependability for Navistar Diesel Engines

What Is It?

The Navistar Diesel Oxidation Catalyst (DOC) OEM 2603960C91 is a direct-fit replacement designed to reduce harmful emissions in Navistar diesel engines. This component oxidizes carbon monoxide (CO) and unburned hydrocarbons (HC), converting them into less harmful compounds before they pass through the exhaust system.

Why Choose OEM 2603960C91?

Built to meet Navistar’s OEM specifications, the 2603960C91 DOC ensures reliable emissions reduction and seamless integration with the vehicle’s aftertreatment system. It supports effective downstream DPF working conditions by maintaining the proper exhaust temperature and gas composition required for efficient regeneration.

Key Benefits

✅ OEM-Certified Fit: Engineered for direct replacement on compatible Navistar platforms
✅ Reduces Harmful Gases: Converts CO and hydrocarbons into CO₂ and water vapor
✅ Supports Regeneration: Maintains temperatures needed for effective DPF function
✅ Durable Design: Withstands high thermal loads in demanding diesel applications
✅ Sensor-Compatible: Ready for OEM temperature and pressure sensor integration

Applications

This DOC is typically used in Navistar commercial vehicles, including trucks, buses, and specialty diesel-powered platforms. It's well-suited for operations requiring strict emissions control and consistent aftertreatment performance under demanding driving conditions.

Installation Notes

Have a certified technician inspect the system before installation. Replace worn gaskets or clamps and confirm sensor ports are clean and properly aligned. After installation, clear any emissions-related fault codes and verify system functionality with diagnostic tools.

Final Thoughts

The OEM 2603960C91 DOC is a critical component in maintaining clean emissions and proper exhaust treatment in Navistar diesel vehicles. With its reliable construction and OEM fit, it helps keep your emissions system functioning effectively and your vehicle compliant with current standards.