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Complete Guide: Genuine 2003–2011 Toyota Prius Hybrid Vehicle Control Unit | OEM 89981-47331 / 8998147331

by Shiraz Amjad 21 Nov 2025
Complete Guide: Genuine 2003–2011 Toyota Prius Hybrid Vehicle Control Unit | OEM 89981-47331 / 8998147331, automan spare parts

Introduction to Automan Spare Parts

Welcome to AutoManSpareParts.com, Australia's number one trusted source for OEM hybrid and petrol Vehicle Control Units (ECUs, HVCUs, TCMs, BCMs, ECMs).
We supply the largest range of genuine Toyota control modules, including the Prius Hybrid Control Unit, at the cheapest rates, with fast global shipping to the USA, Mexico, UAE, Europe, Asia, and worldwide.

If you're looking for a reliable, tested, original Hybrid Vehicle Control Unit for your Toyota Prius, AutoMan is your best source.

Complete Guide to Genuine 2003–2011 Toyota Prius Hybrid Vehicle Control Unit | OEM 89981-47331 / 8998147331

1. What Is the Toyota Prius Hybrid Vehicle Control Unit?

The Hybrid Vehicle Control Unit (HVCU) is the central brain of the Prius hybrid system.
It controls communication between:

  • Hybrid Battery ECU

  • Engine Control Module

  • Inverter & Converter

  • Electric Motors MG1 & MG2

  • Regenerative braking

  • Power distribution

Without a functioning HVCU, the hybrid system cannot operate safely.

OEM Numbers:

This module is specifically designed for second-generation (XW20) and early third-generation Prius models.

2. Key Functions of the Prius Hybrid Vehicle Control Unit

  • Manages hybrid power split between petrol engine and electric motors

  • Monitors HV battery state of charge

  • Controls regenerative braking

  • Communicates with ABS, inverter, BCM, and engine ECU

  • Maintains charging system efficiency

  • Oversees hybrid safety protocols

  • Optimizes fuel economy and performance

3. Symptoms of a Faulty Hybrid Vehicle Control Unit

If the HVCU is failing, you may experience:

  • Check Hybrid System warning

  • Vehicle not starting

  • Low or no electric drive power

  • Poor fuel economy

  • Inverter overheating

  • P0A series hybrid system DTC codes

  • Vehicle entering limp mode

  • Sudden shutdown of hybrid system

Ignoring these symptoms can result in hybrid system damage.

4. Do You Need Programming When Replacing the HVCU?

Yes.
A replacement Prius Hybrid Vehicle Control Unit typically requires programming / initialization using:

  • Toyota Techstream

  • Compatible professional diagnostic tools

Programming ensures synchronization with:

  • Hybrid battery ECU

  • Immobilizer/Smart Key

  • Engine ECU

Many units sold by AutoMan Spare Parts come pre-programmed and ready to install, depending on your vehicle model and region.

5. Compatibility Table: OEM 89981-47331 / 8998147331

Vehicle Compatibility

Make Model Years Engine/Hybrid System Notes
Toyota Prius 2003 Hybrid OEM 89981-47331 compatible
Toyota Prius 2004 Hybrid Direct fit
Toyota Prius 2005 Hybrid Direct fit
Toyota Prius 2006 Hybrid Plug and play after programming
Toyota Prius 2007 Hybrid Compatible with XW20
Toyota Prius 2008 Hybrid Requires initialization
Toyota Prius 2009 Hybrid Fully compatible
Toyota Prius 2010 Hybrid Some markets use same HVCU variant
Toyota Prius 2011 Hybrid Compatibility based on VIN

6. Why Buy from AutoMan Spare Parts?

AutoMan Spare Parts guarantees:

  • 100 percent genuine OEM Toyota Hybrid ECUs

  • Cheapest pricing in Australia

  • Global express shipping

  • Huge stock of hybrid ECUs, batteries, inverters, and control modules

  • VIN-based compatibility confirmation

  • Professional support for programming requirements

We supply worldwide—including USA, Mexico, Canada, UAE, UK, Europe, Japan, and Africa.

FAQs

1. Does this HVCU fit all Toyota Prius models?

It fits 2003–2011 Prius, but exact compatibility depends on VIN. AutoMan can verify before purchase.

2. Does the Hybrid Vehicle Control Unit need programming?

Yes. Programming and initialization are usually required for correct hybrid system operation.

3. What are the OEM part numbers?

The main numbers are 89981-47331 / 8998147331.

4. Can I drive with a faulty HVCU?

Not recommended. It can disable the hybrid system and damage the inverter or battery.

5. Is installation difficult?

Physical installation is simple, but software programming requires a professional.

6. Do you provide international shipping?

Yes, AutoMan ships worldwide with fast courier options.

TLDR Version

  • The Toyota Prius Hybrid Vehicle Control Unit (HVCU) OEM 89981-47331 controls the hybrid drive system.

  • Fits 2003–2011 Prius, with VIN confirmation recommended.

  • Symptoms of failure include warning lights, no electric power, and hybrid shutdown.

  • Replacement requires programming/initialization using Techstream.

  • AutoMan Spare Parts offers genuine OEM units at Australia’s lowest prices with worldwide fast shipping.

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