Cummins ISM, M11 Jake Brake Assembly 2001-2006: OEM 3103430

Dependable Engine Braking for Cummins ISM & M11 Engines (2001–2006)

What is it?
The Cummins ISM/M11 Jake Brake Assembly, designed for 2001–2006 engines and identified by OEM part number 3103430, is a durable engine braking component. Installed on compatible Cummins ISM and M11 diesel engines, it creates controlled engine resistance by modifying valve action to slow the vehicle, reducing reliance on service brakes during deceleration or downhill travel.

Why choose this Jake Brake Assembly?
Built to meet Cummins’ original design specifications for ISM and M11 engines, this assembly offers reliable integration with the engine’s valve train and control systems. When the engine brake system becomes worn or less effective, drivers may experience weaker deceleration and increased wear on service brakes. Choosing the correct OEM-specified assembly helps restore effective engine braking and dependable vehicle behavior.

Key Benefits
✅ Designed specifically for Cummins ISM and M11 engines (2001–2006)
✅ Helps manage vehicle speed with controlled engine resistance
✅ Reduces strain on service brakes in demanding conditions
✅ Direct-fit design — no alterations required
✅ Built to handle heavy-duty duty cycles

Applications
This Jake Brake Assembly is ideal for medium and heavy-duty trucks and commercial equipment powered by Cummins ISM or M11 engines from the 2001–2006 model years. It’s especially useful in regional haul, vocational, and transport applications where additional deceleration control supports driver confidence and overall safety.

Installation Notes
Before servicing, ensure the engine is turned off and has fully cooled. Remove any covers or components obstructing access to the existing Jake Brake Assembly. Carefully detach the old unit, inspect surrounding valve train and mounting hardware for wear or damage, and install the replacement assembly using correct torque specifications. After installation, test the engine braking system in a controlled environment to verify proper performance.

Final Thoughts
If your ISM or M11-equipped vehicle is showing diminished engine braking response or greater reliance on service brakes, installing the correct OEM Jake Brake Assembly can help bring back controlled deceleration. The Cummins ISM/M11 Jake Brake Assembly (OEM 3103430) plays an important role in maintaining safe, predictable vehicle control.