Just plug a USB cable into the cars USB ports and the iPhones Lightning port. In most cases, the cars infotainment system will automatically switch to the USB input. If it doesnt, manually switch to USB using the cars source control. Youll be able to play your iPhones audio through the car speakers.

How do I get my car to recognize a USB device?

If the device isnt recognized, remove the USB device and then re-insert it. Make sure that your device is set to the required mode before connecting it to the car stereo. Some USB devices need to be in a specific mode (such as a Mass Storage Class or Player mode, etc.) before you can use the USB device for playback.