VolvoEngine Parts

HFP2100329 — Ecu Controller Unit 129938-75050 For Yanmar 4Tnv98-Epdbw Engine Doosan Dx55W Hyundai R55 R55-7 Volvo Ec55B With Program

This ECU (Engine Control Unit) controller unit is the 'brain' of the engine management system, processing sensor data and controlling fuel injection, ignition timing, and other critical engine functions for Yanmar and compatible engines. It is programmed to meet specific operational parameters, ensuring optimal performance and emissions, unlike a failed ECU that can cause erratic engine behavior or complete shutdown. Operators may experience a complete lack of engine start, intermittent stalling, or various engine fault codes appearing when this unit fails.

Ecu Controller Unit 129938-75050 For Yanmar 4Tnv98-Epdbw Engine Doosan Dx55W Hyundai R55 R55-7 Volvo Ec55B With Program – Part No HFP2100329 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeEngine Control Unit (ECU)
MaterialElectronic Components, Aluminum Housing
ApplicationEngine Management System
Service LifeReplace as needed based on diagnosis
CompatibilityYanmar 4TNV98-EPDBW, Doosan DX55W, Hyundai R55, R55-7, Volvo EC55B
ConditionNew — Programmed aftermarket

Failure Symptoms

The most common symptom of a failing ECU is the engine's inability to start or intermittent stalling during operation. Other indicators include a wide range of engine fault codes, erratic engine performance, or a complete loss of communication with diagnostic tools. If left unaddressed, the equipment will be inoperable, requiring extensive troubleshooting to identify the root cause.

Installation Tip

Ensure the battery is disconnected and all electrical connections are clean and secure before removing the old ECU. Avoid exposing the new ECU to static electricity during handling and installation.

Service Note

Before replacing the ECU, thoroughly check all engine sensors, wiring harnesses, and grounds for any faults or damage that could mimic ECU failure.