Stereo Accessory Installation Guide
2004 Toyota Prius
v1.03: October 5, 2004.
Created by Chris Dragon
The following guide describes how to disassemble the dashboard of the 2004 Toyota Prius in order to
remove the stereo to install aftermarket accessories. It is geared towards installing a Neo CD-changer
to RCA (aka line-in) adapter, although what you install after disassembling the dash is up to you (see
pg 11 for a discussion of various options). It was based on disassembling a Prius without a factory CD
changer or tape deck, though I would guess that the process wouldn’t change much if either of those
components were installed. It was written by an average Prius owner who has no formal electrical or
automotive maintenance training, so use at your own risk.
Disclaimer: The author of this document and anyone who distributes it do not warrant or assume any
legal liability or responsibility for the accuracy, completeness, or usefulness of any information,
apparatus, product, or process disclosed. Any disassembly of or modifications made to your vehicle
using this guide are done at your own risk and are not recommended or endorsed by the author of this
document or its distributors. Such disassembly or modifications may damage your vehicle, void its
warranty, or cause personal injury.
With those warnings in mind, I have disassembled my dash twice without damage to my vehicle, and I
have done my best to make this guide as clear and easy to follow as possible. I would normally
recommend disconnecting a car’s battery before exposing its internal workings, but I do not know if it
is possible to disconnect the Prius’s huge battery array, or if trying to do so could cause damage to the
car. My battery remained connected during my two dashboard disassemblies.
Tools you will need:
• 10mm socket wrench (an adjustable wrench will not fit, as the bolts are inset)
• A large Phillips head screwdriver.
• A small flathead screwdriver used for pressing small latches.
• A pair