--- product_id: 213512802 title: "70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness" brand: "metra" price: "€ 43.82" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.pt/products/213512802-70-5521-2003-and-up-ford-r-amp-integration-sub store_origin: PT region: Portugal --- # Optimized for Ford amp integration Seamless RCA connectivity Proudly USA made 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness **Brand:** metra **Price:** € 43.82 **Availability:** ✅ In Stock ## Summary > 🔊 Upgrade your Ford’s audio game with Metra’s precision harness! ## Quick Answers - **What is this?** 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness by metra - **How much does it cost?** € 43.82 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/213512802-70-5521-2003-and-up-ford-r-amp-integration-sub) ## 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 - • **Made in the USA:** Support local manufacturing with a harness proudly produced on American soil. - • **Plug & Play Precision:** Effortless RCA harness designed specifically for 2003+ Ford models, ensuring perfect fit and function. - • **Boost Your Sound System:** Integrates seamlessly with your vehicle’s amplifier and subwoofer for enhanced audio performance. - • **Authentic Quality Assurance:** Original branded Metra product crafted with premium materials for durability and reliability. - • **Highly Rated by Enthusiasts:** Trusted by thousands with a solid 4.4-star rating, proving its value and performance. ## Overview The METRA 70-5521 is a high-quality, USA-made RCA amp integration/sub harness designed specifically for 2003 and newer Ford vehicles. It ensures seamless connectivity between your factory amplifier and aftermarket audio components, delivering reliable performance backed by strong customer satisfaction. ## Description METRA 70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness ## Features - Best Quality - Original Branded Product ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B000K50GTA | | Brand Name | Metra | | Connector Type | RCA | | Country Of Origin | USA | | Customer Reviews | 4.4 4.4 out of 5 stars (3,745) 4.4 out of 5 stars | | Global Trade Identification Number | 00086429129522 | | Item Dimensions | 1 x 1 x 1 Millimeters | | Item Weight | 0.02 Pounds | | Manufacturer | METRA | | Model Number | 70-5521 | | Part Number | 70-5521 | | Upc | 086429129522 | ## Product Details - **Brand:** Metra - **Connector Type:** RCA - **Item Weight:** 9 g - **Item dimensions L x W x H:** 1 x 1 x 1 Millimeters - **Manufacturer:** METRA ## Images ![70-5521 2003 & Up Ford(R) Amp Integration/Sub Harness - Image 1](https://m.media-amazon.com/images/I/61CORK-mQCL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excelente producto *by on Reviewed in Mexico 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 on Reviewed in the United States 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 on Reviewed in the United Kingdom 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/213512802-70-5521-2003-and-up-ford-r-amp-integration-sub](https://www.desertcart.pt/products/213512802-70-5521-2003-and-up-ford-r-amp-integration-sub) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-22*