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What are the reasons why the car USB does not respond when a USB flash drive is plugged in?

3 Answers

JuneFitz

09/01/25 2:52am

Car USB does not respond when a USB flash drive is plugged in due to incorrect file format, improper formatting of the USB drive, etc. The specific reasons are as follows: Incorrect file format: The USB interface can play FLAC and MP3 format audio files. Improper formatting of the USB drive: The USB drive needs to be formatted in FAT32 format. USB drive memory too large: The memory capacity should be less than 8GB.

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HarrisonLee

09/13/25 5:46am

When you find that the car USB port doesn't respond after inserting a USB drive, this is quite common. Let me share several typical scenarios with you first. It could be that the USB drive itself is damaged, such as chip wear after multiple uses, or the format isn't compatible with your car's system—many vehicles only recognize FAT32 format. Also, check the USB port; the contacts might be blocked by dust or oxidized. Try gently cleaning them with a cotton swab. Another possibility is a vehicle system issue, like the media settings not being switched to USB source, or the car's software needing an update. If the USB drive works on a computer but not in the car, it's definitely a compatibility issue. Lastly, check the fuse; the circuit fuse for the USB interface might have blown. I recommend troubleshooting yourself first: test with a different USB drive, clean the port, and confirm USB is enabled in the settings. If that doesn't work, take it to a professional repair shop promptly to avoid delaying your music or navigation.

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Elias

10/27/25 6:33am

The issue likely stems from minor details in the USB system. The port hardware is prone to damage—loose contacts or unstable power supply can cause device recognition failure, possibly due to aging wiring or collision impacts in the vehicle. On the software side, system compatibility is crucial; older car models may not support large-capacity USB drives or NTFS format. I recommend first testing the USB drive on a laptop. If it works normally, then the problem lies with the car—such as interference from cigarette lighter accessories or a blown fuse. Don’t forget to update the vehicle’s media system, as some bugs can block data transfer. It could also be a speed issue with the USB drive, where high-speed files won’t work on low-speed ports. Start troubleshooting with simple steps: try different port locations, restart the car’s infotainment system. If unsure, consult a technician to use a multimeter for circuit testing to ensure safety.

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