---
product_id: 2222595
title: "Metra TYTO-01 JBL Amplifier Interface Harness, BLACK"
brand: "axxess"
price: "€ 176.44"
currency: EUR
in_stock: true
reviews_count: 13
category: "Axxess"
url: https://www.desertcart.es/products/2222595-metra-tyto-01-jbl-amplifier-interface-harness-black
store_origin: ES
region: Spain
---

# USB update interface for future-proofing Plug & play harness for JBL systems Adjustable input gain for perfect sound Metra TYTO-01 JBL Amplifier Interface Harness, BLACK

**Brand:** axxess
**Price:** € 176.44
**Availability:** ✅ In Stock

## Summary

> 🎧 Upgrade your Toyota JBL sound—because your ride deserves premium clarity!

## Quick Answers

- **What is this?** Metra TYTO-01 JBL Amplifier Interface Harness, BLACK by axxess
- **How much does it cost?** € 176.44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/2222595-metra-tyto-01-jbl-amplifier-interface-harness-black)

## Best For

- axxess enthusiasts

## Why This Product

- Trusted axxess brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Proven Reliability:** Trusted by thousands of Toyota owners who finally got their JBL systems working perfectly—join the club and upgrade with confidence.
- • **Precision Audio Control:** Adjust input gain effortlessly to eliminate distortion and unlock crystal-clear sound quality.
- • **Simplified Installation:** Comes with a 16-pin harness and stripped leads designed to streamline your upgrade process—no more wiring headaches.
- • **Future-Ready USB Interface:** Easily update your interface firmware via USB, keeping your system cutting-edge without hassle.
- • **Seamless JBL Compatibility:** Specifically engineered for 2005-2007 Toyota JBL & JBL Synthesis audio systems—no guesswork, just flawless fit.

## Overview

The AXXESS Metra TYTO-01 is a specialized amplifier interface harness designed for select 2005-2007 Toyota vehicles equipped with JBL and JBL Synthesis audio systems. Featuring adjustable input gain and a USB update interface, it ensures seamless integration and superior sound quality. This harness simplifies installation with a 16-pin connector and stripped leads, providing a reliable, plug-and-play solution that resolves common compatibility issues faced during head unit upgrades.

## Description

Wiring Harness for Select 2003-2008 Toyota Vehicles with JBL/JBL Synthesis Audio Systems. Interface Components TYTO-01 harness, TYTO-01 interface and 16-pin harness with stripped leads

Review: Finally something that worked! - I was pulling my hair out trying to replace the factory head unit in my 2003 Toyota 4Runner that came with the factory JBL audio system (amp and sub in trunk). I was minutes away from just driving my truck off a cliff out of frustration with how many different poorly documented factory wiring options there were for one freaking make/model of car. This was my 4th wiring harness I purchased and the only one that worked. It works perfect. Please note however the product does not match the picture in the description. There are no RCA cables at all, and the black box is a different shape see the attached picture. However, it seems to work fine by hooking up the eight wire leads instead of four RCA's. I will explain what was wrong with the other three harnesses, as I figure people with the same vehicle as me may be running into the same issues and this is the answer. 1st attempt - Metra 70-1761 - This is the standard Toyota 87+ wire harness, however if you have a JBL factory headunit these wires will not fit. This is for non JBL headunits, that only have 4 door speakers. I had to remove 6 panels and take my dash half apart to get to see these factory wires. 2nd attempt - Metra 70-8113 - Fit one of the three factory JBL harnesses, and the new head unit powered on, however no sound. Found out part of my factory JBL system was an amp in the trunk that powers 10 speakers. This harness didn't provide the necessary data signal to the amp to turn it on, so there was no sound. The blue "amp on" wire did not work. 3rd attempt - Metra 70-8117 Amp Bypass Harness - Decided the bypass the amp and center/tweeters all together and just hook up the 4 door speakers with this bypass harness. It did not fit the factory harnesses, and with some extensive googling for wiring guides i found out the specific model factory headunit i had (JBL 56827) has three plugs on it, however none of these 40 some wires work for bypassing. They are all for audio-in expansions and steering control and other stuff. This is about where I lost it. 4th attempt - This - It doesn't look at all like the picture. There are no RCA connections as pictured, and the black box is completely different. My new headunit had RCA connections which made me think this was not going to work. I figured it was worth a shot though so I wired it up to the 8 F/R L/R speaker leads. IT WORKED! It was sounding a bit distorted so I tweaked the attenuator knob and now it sounds incredible and clear. There is about a 5 sec delay from turning my truck on and off till you hear any sound, however it seems to work consistently. There is no steering volume/track control for a JBL 56827, those wires are on a different harness slot that wasn't part of this package. This is the most expensive solution of the four I tried, but it is the only one that actually worked, and the results sound great and functions perfectly. I lost steering wheel volume control, but it sounds like for another $50 you can get a universal steering wheel control adapter. However I'm pretty much over this project, and I'm fine with turning the volume knob by hand. It is so much better having a modern headunit in place of the crappy JBL factory unit, the audio sounds much cleaner and more full despite not doing anything to the factory speakers yet.
Review: Good item - It's a little confusing seeing all the wires, but once you organize them, it's simple to connect everything, and it worked perfectly in my Toyota.

## Features

- For select 2005-2007 Toyota JBL and JBL Synthesis amplified audio system
- Adjustable input gain
- USB update interface compatible

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00133RCCC |
| Best Sellers Rank | #431 in Car Audio & Video Input Adapters |
| Brand | Axxess |
| Connector Type | Usb |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,555) |
| Date First Available | November 3, 2008 |
| Global Trade Identification Number | 00086429158669 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.6 ounces |
| Item dimensions L x W x H | 10 x 4.75 x 3 inches |
| Item model number | TYTO-01 |
| Manufacturer | Metra Electronics |
| Material | Lead |
| Product Dimensions | 10 x 4.75 x 3 inches |
| UPC | 086429158669 |
| Warranty | Please contact the manufacturer |
| Weight | 0.75 Pounds |
| Wireless Remote | No |

## Product Details

- **Brand:** Axxess
- **Connector Type:** Usb
- **Item dimensions L x W x H:** 10 x 4.75 x 3 inches
- **Manufacturer:** Metra Electronics
- **Material:** Lead

## Images

![Metra TYTO-01 JBL Amplifier Interface Harness, BLACK - Image 1](https://m.media-amazon.com/images/I/61Bx4vWqnJL.jpg)

## Questions & Answers

**Q: Could someone explain, to a car AV newb, why I would need this over a standard wiring harness?  I drive a 2003 Lexus IS300.**
A: This is a wiring converter. You need it to plug your new stereo into the Lexus speaker system.  It's designed specifically for the IS300. I used it in my 2002.

**Q: I have a 09 tacoma with jbl. will i need any other harneses or adapters to install a aftermarket radio?**
A: that one is to start the amp. if you want to use your steering wheel control you will need this adapter xxess ASWC...

**Q: Did any one else have an issue with it jumping in and out volume wise?**
A: It might depend upon which version you got and how you connected it.   In the older versions, you would plug it into radio pre amplifier outputs.  The wiring harness came with RCA plugs so you could easily just plug it in to the pre output.   This had problems with the sound, like the one you mentioned, plus static issues, so they changed how to connect it.   Now you connect it to the amplified speaker outputs.   The wiring harness no longer has the RCA plugs, but wires with stripped ends to connect to the speaker wire outputs.  The photo of this unit is of the old style with the RCA plugs.   I don't think you can get it that way anymore.Note, in spite of what it the manual says, it does not work with all Toyotas and Lexus's.  It works if you have a JBL radio.  It does fully work on an RX330, which has a Pioneer radio.   Almost all controls work, but the fader does not.   The fading is permanently stuck at approximately 50/50.

**Q: Does it fit on Toyota corolla s 2010**
A: If your corolla has a JBL system it will work

## Customer Reviews

### ⭐⭐⭐⭐⭐ Finally something that worked!
*by A***M on June 25, 2015*

I was pulling my hair out trying to replace the factory head unit in my 2003 Toyota 4Runner that came with the factory JBL audio system (amp and sub in trunk). I was minutes away from just driving my truck off a cliff out of frustration with how many different poorly documented factory wiring options there were for one freaking make/model of car. This was my 4th wiring harness I purchased and the only one that worked. It works perfect. Please note however the product does not match the picture in the description. There are no RCA cables at all, and the black box is a different shape see the attached picture. However, it seems to work fine by hooking up the eight wire leads instead of four RCA's. I will explain what was wrong with the other three harnesses, as I figure people with the same vehicle as me may be running into the same issues and this is the answer. 1st attempt - Metra 70-1761 - This is the standard Toyota 87+ wire harness, however if you have a JBL factory headunit these wires will not fit. This is for non JBL headunits, that only have 4 door speakers. I had to remove 6 panels and take my dash half apart to get to see these factory wires. 2nd attempt - Metra 70-8113 - Fit one of the three factory JBL harnesses, and the new head unit powered on, however no sound. Found out part of my factory JBL system was an amp in the trunk that powers 10 speakers. This harness didn't provide the necessary data signal to the amp to turn it on, so there was no sound. The blue "amp on" wire did not work. 3rd attempt - Metra 70-8117 Amp Bypass Harness - Decided the bypass the amp and center/tweeters all together and just hook up the 4 door speakers with this bypass harness. It did not fit the factory harnesses, and with some extensive googling for wiring guides i found out the specific model factory headunit i had (JBL 56827) has three plugs on it, however none of these 40 some wires work for bypassing. They are all for audio-in expansions and steering control and other stuff. This is about where I lost it. 4th attempt - This - It doesn't look at all like the picture. There are no RCA connections as pictured, and the black box is completely different. My new headunit had RCA connections which made me think this was not going to work. I figured it was worth a shot though so I wired it up to the 8 F/R L/R speaker leads. IT WORKED! It was sounding a bit distorted so I tweaked the attenuator knob and now it sounds incredible and clear. There is about a 5 sec delay from turning my truck on and off till you hear any sound, however it seems to work consistently. There is no steering volume/track control for a JBL 56827, those wires are on a different harness slot that wasn't part of this package. This is the most expensive solution of the four I tried, but it is the only one that actually worked, and the results sound great and functions perfectly. I lost steering wheel volume control, but it sounds like for another $50 you can get a universal steering wheel control adapter. However I'm pretty much over this project, and I'm fine with turning the volume knob by hand. It is so much better having a modern headunit in place of the crappy JBL factory unit, the audio sounds much cleaner and more full despite not doing anything to the factory speakers yet.

### ⭐⭐⭐⭐⭐ Good item
*by I***C on November 13, 2025*

It's a little confusing seeing all the wires, but once you organize them, it's simple to connect everything, and it worked perfectly in my Toyota.

### ⭐⭐⭐⭐⭐ Works in 2007 RAV4 Limited Edition with JBL stereo.
*by M***N on August 9, 2025*

After ruminating on whether I needed to continue to use this original amplifier with my new ATOTO head unit ( several people said they didn't use the original amplifier with their new head units) I decided to try to preserve the functionality of my original amplifier. I did have to make some connections to the wire harness on my original amplifier but instructions were clear and stereo sounds good.

## Frequently Bought Together

- AXXESS Metra TYTO-01 JBL Amplifier Interface Harness, BLACK
- Metra Toyota 20-pin Steering Wheel Control Add-on Harness with RCA
- Metra Axxess ASWC-1 Steering Wheel Control Interface

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-11*