The Focal IW-NIS-YISO is a dedicated Y-adapter wiring harness designed for easy integration of Focal speaker upgrades in select Nissan vehicles. Engineered for a true plug-and-play connection, this harness simplifies installation by eliminating the need for cutting or splicing factory wires. Compatible with Focal Integration Series kits, the IW-NIS-YISO ensures a secure, reliable connection between your new speakers and the vehicle’s original audio system. It’s the perfect solution for a clean, professional-grade install with seamless OEM compatibility.