This is a replacement kit for installing an aftermarket navigation system (BIGX) on an Alphard equipped with a display audio system. Compatible with BIG X EX11NX and EX11NX2. ■ Set Contents (for NX) ・ Conversion cable ・ Digital terrestrial TV antenna conversion cable ・ GPS antenna conversion cable ・ Hazard switch (pre-improvement) ・ Installation manual ■ Overview ◇ Overview ① Installation is possible by reusing the following parts that are standard on DA vehicles: No troublesome wiring work is required, and it keeps the front window clean because you don't have to stick a film antenna. ・ Rearview camera ・ Digital terrestrial TV antenna ・ GPS antenna ※ Usable regardless of TV subscription ◇ Overview ② The rearview camera uses the original rearview camera. Steering-linked guidelines are displayed. ※ If you plan to change to an Alpine rearview camera, the C-4 set is recommended. ■ Features ・ All connections, including speaker cables, are plug-and-play. ・ Helpnet available (processed so the SOS button does not blink red) ・ Can talk to the operator during an emergency call (operation confirmed) ・ Location information can be sent during an emergency call (operation confirmed) ・ Left and right steering wheel switch operation confirmed ・ Wiring has been modified to allow navigation operation while driving ・ Because no wiring modification is required, it is easy to revert to the display audio. ・ Original rearview camera can be used (with steering line linked guidelines) ・ Rearview camera wiring uses a dedicated connector for direct connection to BIGX ■ Applicable Models ・ Alphard or Vellfire after the January 2020 improvement ・ Vehicles equipped with display audio (not compatible with JBL Premium Surround Sound System) ■ Notes ・ The colors of the wiring and connectors may change.