---
product_id: 1392563
title: "70-5521 Radio Wiring Harness for Ford 03-Up Amp"
brand: "metra"
price: "¥5069"
currency: JPY
in_stock: true
category: "Metra"
url: https://www.desertcart.jp/products/1392563-70-5521-radio-wiring-harness-for-ford-03-up-amp
store_origin: JP
region: Japan
---

# 1.5K Ohm pop-eliminator resistor 2 RCA pre-amp plugs Factory amp integration 70-5521 Radio Wiring Harness for Ford 03-Up Amp

**Brand:** metra
**Price:** ¥5069
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your ride’s sound without the hassle—Metra makes it plug, play, and slay!

## Quick Answers

- **What is this?** 70-5521 Radio Wiring Harness for Ford 03-Up Amp by metra
- **How much does it cost?** ¥5069 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/1392563-70-5521-radio-wiring-harness-for-ford-03-up-amp)

## 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

- • **Turn-On Pop Eliminator:** Built-in 1.5K Ohm resistor ensures smooth amp startup with zero annoying pops.
- • **Premium RCA Connectivity:** Dual RCA plugs connect effortlessly to aftermarket radios for crystal-clear sound output.
- • **Installer-Approved Durability:** Thicker OEM-grade cables and connectors mean faster installs and zero downtime—because your time is money.
- • **Seamless Factory Amp Integration:** Plug-and-play design preserves your vehicle’s original wiring—no cutting or splicing needed.
- • **Tailored for 2003-2005 Ford Models:** Specifically engineered for Ford, Lincoln, and Mercury vehicles to guarantee perfect fit and function.

## Overview

The Metra 70-5521 Radio Wiring Harness is a precision-engineered adapter designed for 2003-2005 Ford, Lincoln, and Mercury vehicles. It enables seamless integration of aftermarket radios with factory amplifiers using high-quality RCA connectors and OEM-grade cables. Featuring a 1.5K Ohm resistor to eliminate turn-on pops, this harness ensures a clean, professional installation with no cutting or splicing required—perfect for installers and audiophiles seeking flawless sound upgrades.

## Description

We at Metra always strive to listen to our customers. You have told us to do a better job at telling the Metra sto ry. For over 70 years, Metra has maintained its cutting edge by paying attention to our marketplace and innovating products to fit the needs of the installer. We are the "Installer's Choice" because we are installers. We design our products to be easy to use and easy on the eyes. If you can see a Metra product, then we haven't done our job. Metra Turbokits are designed to be heard but not seen. This means that our fit and finish is the best in the business. Why trust your installation to a shoddy and time consuming kit? Our GSXL Turbowires are designed with the same philosophy in mind. Their longer length for ease of installation and thicker OEM cables with OEM connectors make for a mighty install, with no down time on returns or angry customers.

## Features

- Factory amplifier integration harness
- 2 RCA Plugs plug into aftermarket radio's pre-amp outputs.Includes Ford Lincoln and Mercury 2003-2005 Turbowire and a 8-pin harness with a pair of RCAs for the OE woofer(s)
- One 24-pin power plug and one 8-pin subwoofer plug
- 1.5K Ohm resistor can be used on the amp-remote wire to eliminate turn-on pop
- Allows for the installation of an aftermarket radio using the existing factory wiring and connectors

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000K50GTA |
| Best Sellers Rank | #121 in Car Audio & Video Wiring Harnesses |
| Brand Name | Metra |
| Cable Type | RCA |
| Connector Type | RCA |
| Customer Reviews | 4.4 4.4 out of 5 stars (3,859) |
| Global Trade Identification Number | 00086429129522 |
| Included Components | Wiring Harness |
| Item Dimensions | 0.02 x 0.02 x 0.02 inches |
| Item Highlight | Aftermarket stereo adapter leads, factory bypass connection, no cutting or splicing, clean easy dash install |
| Item Type Name | Sub-Plug For Select 2003-2005 Ford Vehicles With Premier Radio |
| Item Weight | 9.07 g |
| Manufacturer | METRA Ltd. |
| Material Type | Copper, TPU |
| Model | 70-5521 |
| Number of Items | 1 |
| Part Number | 70-5521 |
| UPC | 086429129522 |
| Unit Count | 1 Count |
| Warranty Description | Please contact the manufacturer |

## Product Details

- **Brand:** Metra
- **Connector Type:** RCA
- **Item Weight:** 9.07 g
- **Item dimensions L x W x H:** 0.02 x 0.02 x 0.02 inches
- **Material:** Copper, TPU

## Images

![70-5521 Radio Wiring Harness for Ford 03-Up Amp - Image 1](https://m.media-amazon.com/images/I/61CORK-mQCL.jpg)

## Available Options

This product comes in different **Customer Package Type** options.

## 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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**Shop now:** [https://www.desertcart.jp/products/1392563-70-5521-radio-wiring-harness-for-ford-03-up-amp](https://www.desertcart.jp/products/1392563-70-5521-radio-wiring-harness-for-ford-03-up-amp)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-10*