---
product_id: 213512802
title: "METRA 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness"
brand: "metra"
price: "฿4631"
currency: THB
in_stock: false
reviews_count: 5
category: "Metra"
url: https://www.desertcart.co.th/products/213512802-metra-70-5521-2003-and-up-ford-r-amp-integration
store_origin: TH
region: Thailand
---

# Seamless amp/sub integration Plug-and-play RCA connector Made in USA quality METRA 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness

**Brand:** metra
**Price:** ฿4631
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Upgrade your Ford’s sound system without the drama!

## Quick Answers

- **What is this?** METRA 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness by metra
- **How much does it cost?** ฿4631 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/213512802-metra-70-5521-2003-and-up-ford-r-amp-integration)

## Best For

- metra enthusiasts

## Why This Product

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

## Key Features

- • **Premium Build Quality:** Original branded Metra product ensuring durability and reliable performance every time.
- • **Plug-and-Play Convenience:** Clearly color-coded wires and RCA connectors for quick, hassle-free installation.
- • **Universal Amp/Sub Support:** Supports factory amp and subwoofer integration for a richer audio experience.
- • **Effortless OEM Compatibility:** Direct fit harness designed for 2003+ Ford models, eliminating the need for cutting or splicing.
- • **Trusted by Pros & Enthusiasts:** 4.4-star rating from over 3,700 users who swear by Metra’s consistent quality.

## Overview

The METRA 70-5521 is a precision-engineered amp integration/sub harness designed for 2003 and newer Ford vehicles. Made in the USA, it offers a plug-and-play RCA connector system that preserves your OEM wiring, ensuring a clean, professional installation. Trusted by thousands of users, this harness seamlessly supports factory amps and subwoofers, making it the go-to choice for upgrading your car audio with zero compromise.

## Description

METRA 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness

Review: Excelente producto - El arnes quedó a la perfección, muchas gracias solo que al querer conectar el arnes chico mi camioneta ya no trae el conector macho que es para el subwoofer de fabrica que trae la camioneta la cual es una explorer eddie bauwer 2005.
Review: Does the job, I was just unclear as to wether I needed the amp out plug - Just bought a ‘04 Lincoln Town Car and didn’t know wether it had an amp/sub or not(couldn’t speak with original owner as it was purchased through a family member and the manual was missing) so I went with this harness because if I didn’t need the amp out harness no big deal, but if I did...well then I’d need it lol. The harness itself is perfect for what it is, a simple harness to prevent cutting and splicing the OEM harness, wires were clearly marked and colors matched the harness for the after market stereo. Went with the Pioneer AVH-X490BS, if you get a pioneer look into getting the parking brake bypass switch. The only problem is that there was nowhere to connect the two blue wires on the harness with the RCA plugs, so I assumed I didn’t need it and just didn’t use it. Reconnected negative terminal on battery and tested radio and it worked great so I figured I was right. I go to install the Infinity Kappa speakers in the rear deck(btw if you have a Town Car be ready to take out the entire rear seat, both bottom and rear cushions to get access to the speakers......) and guess what I see?? A sub and amp.... I was planning on getting an amp for the speakers anyways, and maybe a 8” sub just for a little bass so I’ll just wait to get them rather than hook up the factory amp/sub. If you're replacing a radio you can’t go wrong with Metra, always quality products. Been using them as long as I can remember, and between work, my personal vehicles and friends/family I’ve installed more car stereos and speakers than I can remember and never had an issue with Metra.

## Features

- Best Quality
- Original Branded Product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000K50GTA |
| Brand | Metra |
| Brand Name | Metra |
| Connector Type | RCA |
| Country of Origin | USA |
| Customer Reviews | 4.4 out of 5 stars 3,714 Reviews |
| Global Trade Identification Number | 00086429129522 |
| Item Dimensions | 1 x 1 x 1 Millimeters |
| Item Height | 0.02 Inches |
| Item Weight | 9 g |
| Item dimensions L x W x H | 1 x 1 x 1 Millimeters |
| Manufacturer | METRA |
| UPC | 086429129522 |

## Product Details

- **Brand:** Metra
- **Item dimensions L x W x H:** 1 x 1 x 1 Millimeters
- **Item Weight:** 0.02 Pounds
- **Connector Type:** RCA
- **Manufacturer:** METRA

## Images

![METRA 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness - Image 1](https://m.media-amazon.com/images/I/41om2WFZ2FL.jpg)
![METRA 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness - Image 2](https://m.media-amazon.com/images/I/61CORK-mQCL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excelente producto
*by E***. on 26 January 2023*

El arnes quedó a la perfección, muchas gracias solo que al querer conectar el arnes chico mi camioneta ya no trae el conector macho que es para el subwoofer de fabrica que trae la camioneta la cual es una explorer eddie bauwer 2005.

### ⭐⭐⭐⭐⭐ Does the job, I was just unclear as to wether I needed the amp out plug
*by J***F on 27 May 2018*

Just bought a ‘04 Lincoln Town Car and didn’t know wether it had an amp/sub or not(couldn’t speak with original owner as it was purchased through a family member and the manual was missing) so I went with this harness because if I didn’t need the amp out harness no big deal, but if I did...well then I’d need it lol. The harness itself is perfect for what it is, a simple harness to prevent cutting and splicing the OEM harness, wires were clearly marked and colors matched the harness for the after market stereo. Went with the Pioneer AVH-X490BS, if you get a pioneer look into getting the parking brake bypass switch. The only problem is that there was nowhere to connect the two blue wires on the harness with the RCA plugs, so I assumed I didn’t need it and just didn’t use it. Reconnected negative terminal on battery and tested radio and it worked great so I figured I was right. I go to install the Infinity Kappa speakers in the rear deck(btw if you have a Town Car be ready to take out the entire rear seat, both bottom and rear cushions to get access to the speakers......) and guess what I see?? A sub and amp.... I was planning on getting an amp for the speakers anyways, and maybe a 8” sub just for a little bass so I’ll just wait to get them rather than hook up the factory amp/sub. If you're replacing a radio you can’t go wrong with Metra, always quality products. Been using them as long as I can remember, and between work, my personal vehicles and friends/family I’ve installed more car stereos and speakers than I can remember and never had an issue with Metra.

### ⭐ Be Careful
*by E***P on 12 August 2020*

This just arrived after waiting patiently for its arrival from the USA. Unfortunately this does not fit the Ford Explorer 05 as stated. Good quality item, but clearly a waste of time and money as seller is USA based, this isn't worth a return!

## Frequently Bought Together

- Metra 70-5521 Radio Wiring Harness for Ford 03-Up Amp, computer
- Metra 95-5812 Double DIN Installation Kit Fits SELECT 2004-2019 Ford Vehicles -Black.
- Metra Electronics 70-5520 Wiring Harness for Select 2003-Up Ford Vehicles, MULTI COLOR

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-13*