Metra 70-5520AUX AUX-IN Retention Harness for Ford Lincoln Mercury

Metra 70-5520AUX is a factory aux-in retention harness for select Ford, Lincoln, and Mercury vehicles with factory 3.5mm AUX input. It supports a cleaner aftermarket radio installation by connecting the new radio or integration wiring to the vehicle-specific factory audio wiring without cutting the original harness where applicable.

At a Glance

• Factory AUX-IN retention harness for select Ford, Lincoln, and Mercury vehicles
• Plugs into the vehicle harness at the radio
• Provides RCA connections for retention of the factory 3.5mm auxiliary jack where compatible
• Helps integrate the factory AUX input with an aftermarket radio installation
• Vehicle-specific harness design helps avoid cutting factory wiring where applicable

System / Wiring Notes

• Used to retain a compatible factory 3.5mm auxiliary input during aftermarket radio installation
• Aftermarket radio must have compatible auxiliary audio input capability
• Additional radio wiring harness, dash kit, antenna adapter, or retention interface may be required
• Verify factory AUX input, trim level, and connector style before installation

Vehicle Compatibility

Installation Notes

• Confirm exact vehicle fitment, factory audio system, trim level, and connector style before installation
• Additional installation parts may be required depending on the vehicle and aftermarket radio being installed
• Professional installation is recommended for best results
• Review the manufacturer instructions before installation

What’s in the Box

• Metra 70-5520AUX factory AUX-IN retention harness

Technical Specifications

• Brand: Metra
• Model: 70-5520AUX
• Product Type: Factory AUX-IN retention harness
• Application: select Ford, Lincoln, and Mercury vehicles with factory 3.5mm AUX input
• Compatibility Type: Vehicle-specific
• Retained Feature: factory 3.5mm auxiliary jack where compatible
• Output Type: RCA connections for AUX retention
• Connector Location: plugs into vehicle harness at radio

Identifiers & Packaging

• MPN: 70-5520AUX
• UPC: 086429167098
• Sold As: Each
• Included Components: Metra 70-5520AUX factory AUX-IN retention harness

Why Buy From MCOR Automotive

• Authorized retailer for the brands we sell
• Specialists in vehicle audio integration, radio replacement parts, and installation accessories
• 22+ years of professional automotive electronics experience
• Expert support for compatibility verification and proper setup