EGR Valve for Cummins ISM Engine — 4955421 / 904-5002 | Freightliner, International Harvester & Kenworth

A faulty EGR valve on a Cummins ISM-powered truck doesn't just trigger a check engine light — it affects fuel economy, emissions compliance, and engine performance. This brand-new aftermarket EGR valve is a direct-fit replacement for part numbers 4955421 and 904-5002, engineered to restore proper exhaust gas recirculation across Freightliner, International Harvester, and Kenworth heavy-duty truck applications. Install it and get your truck back on the road — compliant, efficient, and running clean.

Why Replace Your EGR Valve?

A stuck-open EGR valve causes rough idle, loss of power, and increased fuel consumption. A stuck-closed valve leads to elevated NOx emissions, failed emissions tests, and potential engine damage from excessive combustion temperatures. Either way, a faulty EGR valve is a compliance and performance problem that needs to be addressed promptly — especially for commercial fleets where downtime and DOT compliance are non-negotiable.

Compatible Engine

• Cummins ISM

Compatible Trucks

Freightliner: Columbia, FL112

International Harvester: 5500i, 5900i

Kenworth: T600A, W900

Part Numbers

• 4955421
• 904-5002

What's Included

• 1 × EGR Valve (4955421 / 904-5002)

Key Specs

• ✅ 100% Brand New Aftermarket — Not rebuilt or refurbished
• ✅ Direct Drop-In Fit — No modifications required; installs like the original
• ✅ Restores Emissions Compliance — Eliminates EGR-related fault codes and failed emissions tests
• ✅ Improves Engine Performance — Resolves rough idle, power loss, and excessive fuel consumption
• ✅ Multi-Brand Coverage — One part number fits Freightliner, International Harvester, and Kenworth
• ✅ Commercial-Grade Durability — Built for the high-cycle demands of heavy-duty fleet applications

Please verify your engine serial number and existing part number before ordering. Contact us for fitment confirmation if needed.