Car audio systems often lag behind audio options and consumer electronics in general, so you’re more likely to find a 3.5mm auxiliary jack in your car stereo than a USB port. If you’ve seen a USB to aux cable, you may have wondered if you can use it to connect your phone or a USB drive to your car stereo. The answer is probably no, but it’s more complicated than that.
Banggood AUX 3.5mm to USB 2.0 converter for car etc.
USB to Aux cables do exist and they work for the purposes they were designed for. However, they do not act as a conduit for digital music files to your car stereo.
If you plug a USB stick into a USB to Aux cable and plug the cable into a head unit, nothing happens. The same is true in most cases if you plug a USB to Aux cable into a phone and plug it into a head unit.
Some phones and MP3 players are designed to send audio signals over a USB connection, such as the original HTC Dream, which used a single micro-USB connector for both power and audio output, but that's not always the case.
