American International NM9 Antenna Adapter – Aftermarket Radio to OEM Antenna Harness for Nissan & Infiniti (1987‑2012)

The American International NM9 Antenna Adapter is a vehicle‑specific antenna harness designed to let you connect an aftermarket radio to the factory antenna connection in many 1987‑2012 Nissan and Infiniti vehicles. Instead of cutting or splicing into factory wiring, this plug‑and‑play adapter lets you retain your OEM antenna and signal reception when installing a new head unit. Its purpose‑built design ensures a secure fit that matches Nissan/Infiniti connectors and provides a clean, professional installation. Ideal for audio upgrades that require preserving the original antenna lead — no special tools or modifications needed.