Metra
Metra 40-NI21 Infiniti Nissan Factory Diversity Radio Antenna Adapter 1987-2006
Metra 40-NI21 Infiniti Nissan Factory Diversity Radio Antenna Adapter 1987-2006
Couldn't load pickup availability
Buy with the right details confirmed
Confirm the size, power, connections, and included or separately required parts described on this page.
- Authorized retailer New, authentic product from MCOR Automotive.
- Fast U.S. shipping Review shipping details
- Expert help since 2004 Ask MCOR before you order
- Clear return terms Review the return policy
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.
At a Glance
- 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.
Exact Vehicle Compatibility
Find your vehicle below, then match the model year and factory-equipment details in the same row. Factory radio, amplifier, navigation, trim, speaker location, and connector differences can change which installation parts are required. If anything differs, contact MCOR before ordering.
| Make | Model | Years | Factory Equipment / Qualifier |
|---|---|---|---|
| Nissan | Armada | 2004-2005 | With factory navigation |
| Nissan | Armada | 2006-2007 | With factory navigation |
| Nissan | Frontier | 1998-2001 | — |
| Nissan | Quest | 2007-2009 | — |
| Subaru | Outback | 2012-2014 | Without factory amp (base radio); Without factory navigation |
Fitment note: Year and model alone are not always enough to confirm compatibility. Match every factory-equipment qualifier shown for your vehicle, and contact MCOR Automotive if the radio, amplifier, navigation, speaker, camera, trim, or connector details are uncertain.
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: 086429017799
- 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
Share
