Metra 40-NI21 Infiniti Nissan Factory Diversity Radio Antenna Adapter 1987-2006

The Metra 40-NI21 antenna adapter cable is designed for select Infiniti and Nissan vehicles when connecting an aftermarket antenna to a factory diversity radio. It adapts an aftermarket antenna cable to the original Nissan diversity factory radio and disables diversity functions.

Key Features

• Antenna adapter cable for select Infiniti / Nissan factory diversity radios
• Used to adapt a factory diversity radio with a 2-pin connector to an aftermarket antenna
• Female Motorola-style connector on one end
• Nissan-style antenna connector on the other end
• Disables diversity functions

System / Fitment Notes

• This adapter disables factory diversity antenna functions.

Vehicle Compatibility

Installation Notes

• Confirm exact year, make, model, factory radio, and antenna connector before installation.
• Match the adapter direction to the installation type: aftermarket radio, factory radio, aftermarket antenna, or FM modulator.
• Additional radio installation parts may be required depending on the vehicle and head unit.
• Professional installation is recommended for proper antenna integration and signal performance.

What’s in the Box

• Antenna adapter cable as supplied by Metra

Technical Specifications

• Brand: Metra
• Model: 40-NI21
• Product Type: Antenna adapter cable
• Application: Aftermarket antenna to factory Infiniti / Nissan diversity radio
• Connector Type: Female Motorola-style to Nissan-style antenna connector
• Compatibility Type: Antenna integration adapter

Identifiers & Packaging

• MPN: 40-NI21
• UPC: 86429017799
• Sold As: Each
• Included Components: Antenna adapter cable as supplied by Metra

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