PC400-7 PC450-7 Excavator ECU Controller Unit 7872-20-4301 7872-20-3500 Computer Board for SA6D125E-3C-7L Diesel Engine

The Excavator ECU Controller Unit 7872-20-4301 / 7872-20-3500 is a high-quality electronic control module designed for Komatsu PC400-7 and PC450-7 excavators equipped with SA6D125E-3C-7L diesel engines.

This computer board controls and manages critical engine operating parameters, helping maintain stable engine performance, accurate fuel control, and reliable machine operation in demanding construction environments.

Manufactured with durable electronic components and a rugged aluminum housing, this ECU controller is built to withstand vibration, heat, and harsh working conditions commonly found in excavator applications.

• Precise electronic management of engine functions
• Helps improve operating stability and efficiency
• Supports smooth excavator operation

• Heavy-duty aluminum alloy housing
• Excellent heat dissipation design
• Resistant to vibration and industrial environments

Compatible with original controller specifications:

• Part Number: 7872-20-4301
• Replacement Number: 7872-20-3500
• Type: ECU Controller / Engine Control Unit / Computer Board

Designed for:

• Komatsu PC400-7 Excavator
• Komatsu PC450-7 Excavator
• SA6D125E-3C-7L Diesel Engine

Compatible Excavator Models:

• ✔ PC400-7
• ✔ PC450-7
• ✔ PC400LC-7 (depending on configuration)

Compatible Engine:

• ✔ SA6D125E-3C-7L Diesel Engine

JISION provides professional aftermarket electronic control components for construction machinery.

• ✔ Strict quality inspection before shipment
• ✔ Stable ECU performance testing
• ✔ Professional packaging for international delivery
• ✔ Support bulk orders and wholesale supply
• ✔ Technical support available for model confirmation

1 * Excavator ECU Controller Unit
(7872-20-4301 / 7872-20-3500)

• PC400-7 ECU Controller
• PC450-7 Engine Controller
• 7872-20-4301 Computer Board
• 7872204301 ECU ECM
• SA6D125E Controller
• Komatsu Excavator Electrical Parts
• Excavator Control Unit
• Heavy Equipment ECU Replacement