Cummins ISLG DOC : OEM 4969771RX

Emissions Control for Natural Gas-Powered Cummins ISL G Engines

What Is It?

The Cummins ISL G Diesel Oxidation Catalyst (DOC) OEM 4969771RX is a direct-fit emissions component engineered specifically for natural gas-powered ISL G engines. This DOC plays a critical role in converting harmful exhaust gases—such as carbon monoxide and unburned hydrocarbons—into less harmful compounds before they exit the exhaust system.

Why Choose OEM 4969771RX?

Built to Cummins’ exacting OEM standards, the 4969771RX ensures proper thermal efficiency, flow rate, and emissions conversion. It’s designed for seamless integration with ISL G engine platforms, helping maintain compliance with EPA and CARB regulations while supporting stable engine operation.

Key Benefits

✅ Designed for ISL G Natural Gas Engines: Specifically engineered for CNG and LNG applications
✅ Effective Gas Conversion: Converts carbon monoxide and hydrocarbons into CO₂ and water vapor
✅ OEM-Grade Fit and Quality: Direct replacement for the factory-installed DOC
✅ Regeneration-Free Operation: No soot accumulation, unlike diesel-based DPF systems
✅ Supports Emissions Compliance: Helps maintain legal exhaust standards and avoid system faults

Applications

This DOC is used in transit buses, refuse trucks, and vocational vehicles powered by Cummins ISL G engines using compressed or liquefied natural gas (CNG/LNG). It’s essential for fleets operating in areas with stringent emissions requirements and environmental oversight.

Installation Notes

Installation should be completed by a qualified technician. Check all mounting surfaces, sensor ports, and fasteners for integrity. After installation, verify correct ECM recognition and inspect for any fault codes. No regeneration cycle is required, but system testing is advised.

Final Thoughts

The OEM 4969771RX DOC is a purpose-built solution for emissions control in Cummins ISL G engines. With natural gas vehicle adoption growing, this component helps maintain system reliability and emissions compliance—keeping your clean-fuel fleet operating smoothly.