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Wiring Harness 4377400 for Cummins Engine EPA13 13 Liter ISZ

Wiring Harness 4377400 for Cummins Engine EPA13 13 Liter ISZ

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Product Details

Wiring Harness 4377400 for Cummins Engine EPA13 13 Liter ISZ

Replacement Part Number: 4377400, 4377400CUM

Fit For Cummins Engine: EPA13 13 Liter ISZ

Product Highlights
Brand: FridayParts
Compatible Engine Brand: For CUMMINS
Engine Number: ISZ
Replacement Part Number: 4377400, 4377400CUM
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Matthew Spanier
Reviewed on 17/10/2025
Fixed our ISZ's electrical gremlins for good!

Our ISZ engine was throwing multiple sensor codes and running erratically. This wiring harness was the perfect cure – all connectors matched perfectly and it eliminated all our intermittent electrical issues. The engine now runs smoothly with no fault codes. A reliable OEM-grade solution.

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