The disclosure includes a system and method for wireless data sharing between a mobile client device and a three-dimensional heads-up display unit. A system may include a three-dimensional heads-up display unit (“3D HUD”) installed in a vehicle. The system may include a memory storing instructions that, when executed, cause the system to: establish a peer-to-peer video stream between a mobile client device and the vehicle; generate live video data for providing a video stream for causing a screen of the mobile client device to display visual content of the 3D HUD that includes substantially live images depicting what the driver of the vehicle sees when looking at the 3D HUD; and stream the live video data to the mobile client device to cause the screen of the mobile client device to display the video stream that depicts what the driver of the vehicle sees when looking at the 3D HUD.