345-3388 357-2083 485-5429 320E 323E 120M ECM ECU ENGINE CONTROLLER 320E 323E 324E 329E

The Caterpillar 357-2083 Engine Control Module (ECM) is a high-performance electronic controller designed for CAT excavators and construction machinery equipped with C4.4 and C6.6 engine platforms.

This ECM manages critical engine functions including fuel injection timing, engine speed control, emissions management, diagnostic monitoring and machine communication systems. It ensures stable machine operation, improved fuel efficiency and reliable engine performance in demanding construction environments.

All units can be tested and configured before shipment according to machine requirements.

Suitable for CAT excavators and equipment such as:

• CAT 320E
• CAT 320EL
• CAT 323E
• CAT 324E
• CAT 326E
• CAT 329E
• CAT 336E

• CAT C4.4 Engine
• CAT C6.6 Engine

Controls fuel delivery, engine timing and operational parameters.

Designed for heavy-duty construction and mining applications.

Compatible with CAT electronic diagnostic systems.

Software configuration and programming support available according to machine serial number.

Each controller undergoes functional inspection before delivery.

If your machine experiences:

• Engine starting problems
• Communication faults
• Power reduction
• Fault code alarms
• Intermittent shutdowns
• Injector control errors

the ECM may require diagnosis or replacement.

We provide:

✔ ECM / ECU Controllers

✔ Wiring Harness Assemblies

✔ Monitor Displays

✔ Sensors

✔ Solenoid Valves

✔ Diagnostic Tools

✔ Remote Technical Support

Please provide:

• Machine Model
• Engine Model
• ECM Part Number
• Machine Serial Number

We will help confirm the correct program and replacement solution.