The Aerpro APP0140 is a Primary Harness designed to suit various Toyota vehicles with large two plug connectors. It allows for the installation of an aftermarket headunit without the need to remove the factory wiring plug from the vehicle. APP0140 converts the factory headunit plug in the vehicle into a universal double ISO connector system. For simple plug and play headunit installation, add an Aerpro APP8 Secondary Headunit harness to suit your new aftermarket headunit and the two looms will connect together via the ISO connector system.Features: Designed for quick, simple and precise aftermarket headunit wiring installation Vehicle specific plug designed to connect directly into the vehicles original headunit wiring loom, no need to remove the factory plug Converts vehicle specific plug to universal ISO connector system Provides a Plug & Play installation solution for aftermarket headunits when paired with an Aerpro APP8 Secondary Harness (some hard-wiring may still be required) Secure Clips on ISO connectors to ensure secure and long lasting connection Suits various Toyota Vehicles with large two plug connectors Please note: Harnesses vary between vehicle models, to find the correct harness for your vehicle, use the Aerpro Vehicle Selector. Depending on the vehicle and aftermarket headunit, installation may not be completely plug and play, a small amount of hard-wiring may still be required to complete the installation. Suits various Toyota Vehicles with large two plug connectors. When paired with Aerpro APP8 Series Secondary Harness plug and play solution a small amount of hardwired installation may still be required depending on the vehicle and aftermarket headunit type.