USB ports not working in cars is a common issue many drivers face. With the rise in use of USB ports for charging devices and connecting to infotainment systems, most new vehicles today come equipped with USB ports. However, these ports can sometimes stop functioning properly due to a variety of factors.
According to Bloomberg, the number of vehicles sold in the U.S. with USB ports rose to about 14.6 million in 2015, up from just 3.2 million in 2012. As USB ports become more prevalent in vehicles, issues with them not functioning properly are also on the rise.
Causes of USB Port Failure
There are a few common reasons why a USB port may stop working in a car:
Physical Damage
The USB port itself could be damaged or broken, preventing a solid connection. This can happen from normal wear and tear over time, or if the port suffers any physical impact. If the metal connector inside looks bent or broken, this likely needs to be repaired or replaced (Source).
Software Issues
Many cars have firmware that controls the USB ports. If this firmware becomes corrupted or outdated, it can cause connectivity issues. A software update from the dealer may be required to get the USB working again (Source).
Incompatible Devices
Some USB devices may not be fully compatible with the USB port hardware or software in the car. Trying a different USB device, like a basic flash drive, can help determine if this incompatibility is the issue. The car manufacturer may have a list of tested/approved devices (Source).
Physical Damage
One of the most common reasons a USB port may stop working in a car is physical damage to the port itself. This can happen in a few ways:
Worn out ports from repeated use – USB ports in cars are not designed to withstand the frequent plugging and unplugging that comes with daily use. Over time, the port can wear out from this repeated mechanical stress.1
Damage from foreign objects inserted – Inserting the wrong cable or connector into the USB port can damage the delicate pins inside. For example, trying to force a USB-C cable into a USB-A port can bend or break the port’s pins.2
Damage from liquids spilled – Spilling coffee or other liquids into the USB port can short circuit and fry the electronics inside the port. Sugary drinks can leave behind sticky residue that gunks up the port.
In these cases of physical damage, the USB port may need to be replaced in order to function again. Preventing damage by avoiding straining the port and protecting it from moisture are the best ways to preserve USB function over the long term.
Software Issues
Outdated firmware on the vehicle’s infotainment system is a common source of USB port problems. As the car manufacturer releases software updates, the USB ports may stop functioning properly if the firmware is not updated. According to Way.com, firmware problems like bugs or compatibility issues with new devices can prevent the USB ports from working.
Bugs in the USB port software code may also arise after major software updates to the infotainment system. As noted in the Kia owner’s forum, USB ports sometimes malfunction due to software bugs introduced in newer firmware versions. Outdated firmware may not have the proper code to communicate with newer devices that get plugged into the USB ports.
Overall, keeping the vehicle’s software and firmware updated is key to avoiding USB port problems stemming from compatibility issues or bugs in outdated code. Consult the owner’s manual or dealership service center to determine the latest firmware available for the infotainment system and properly update it if USB issues arise after a software update.
Incompatible Devices
Sometimes a USB port may not recognize or work properly with certain devices due to incompatibility issues. This is often caused by one of the following:
Power draw issues – Some USB devices try to draw too much power from the car’s USB port and get rejected. Devices like external hard drives and some wireless adapters are notorious for this.
Formatting issues – The car’s USB port may not recognize the file system format on some USB thumb drives and external hard drives. For example, Linux EXT formats are often not readable.
Handshake issues – There can be compatibility problems between the USB device and car stereo during the initial electronic “handshake”. Some simple devices like flash drives usually work, while more complex gadgets sometimes do not.
To avoid incompatibility problems, use a basic USB thumb drive that is formatted with FAT32 or exFAT. Avoid high-power devices. There are also USB adapters that can smooth out handshake issues. Switching to a different USB device that has worked before in the car is recommended for troubleshooting.
Sources:
https://acurazine.com/forums/2g-rdx-audio-bluetooth-electronics-navigation-405/incompatible-usb-device-fix-1000998/
https://www.sony.com/electronics/support/articles/00030145
Diagnosing the Issue
There are a few steps you can take to diagnose why your USB port is not working properly in your car:
Visual Inspection
First, visually inspect the USB port for any signs of damage like bent pins, cracks, missing pieces, etc. Physical damage can prevent the port from functioning properly (source). Carefully inspect the port and surrounding area.
Testing with Multiple Devices
Try connecting different USB devices like phones, flash drives, charging cables to see if the issue is isolated to one device or affects multiple devices. An incompatible or faulty device could be the culprit rather than the port itself (source). Test different devices to narrow down the problem.
Checking Error Codes
Many cars have built-in diagnostics that can point to USB errors. Check your owner’s manual to see if your infotainment system reports any error codes related to the USB. This can help identify software faults or integration issues causing the problem.
Repairing Physical Damage
If your car’s USB port has become physically damaged or disconnected, you may need professional repair or replacement. According to NAPA, physical damage to the USB port itself or a loose/damaged USB cable can prevent the port from functioning properly. In severe cases, the USB port assembly may need to be replaced entirely.
You can take your vehicle to a professional auto repair shop to have the USB port or cable replaced. The mechanic will examine the damage, order any necessary replacement parts, and install the new USB port or cable. Expect to pay $100-200 or more for professional USB port replacement, depending on your vehicle.
For minor physical damage, DIY USB port repair may be possible. Carefully inspect your car’s USB port for any debris, damage, or loose connections. If the USB cable has become loose, you may be able to open the trim/console and securely reattach it. Refer to your owner’s manual or online guides for step-by-step instructions. Be very gentle, as forcing connectors can cause further damage. Overall, professional repair is recommended for physical USB port issues to ensure proper operation.
Updating Software
Many cars come equipped with an infotainment system that runs on software and firmware. Over time, bugs or incompatibilities may develop that cause issues like USB ports not working properly. In these cases, updating the software and firmware may resolve the problem.
The first step is to check your current firmware version. This can usually be found in the settings menu of your infotainment system. Refer to your owner’s manual if you’re unsure of where to locate this information. Once you know your current version, you can check the manufacturer’s website for any available updates.
For example, Ford releases periodic Sync software updates that can be downloaded to a USB drive and installed in your car (source). Other manufacturers like Honda and Toyota also provide infotainment software updates. Follow your manufacturer’s instructions for installing any updates to ensure proper installation.
Finally, if the USB issue persists after updating, try resetting your infotainment system back to factory default settings. This will clear out any corrupted files that may be causing problems. Refer to your owner’s manual or dealer for steps on how to perform a reset. With new software and a reset, your USB ports should be functioning properly again.
Using Alternatives
If your car’s USB port is damaged or incompatible with your device, there are some alternative options you can use to connect your smartphone or music player in the car.
One popular option is a cassette adapter. This device converts audio from a headphone jack into a cassette tape that can be played in your car’s cassette player. While the sound quality isn’t as good as a direct USB connection, it’s a simple and inexpensive workaround. Some popular options are the ION Audio Cassette Adapter and the Nulaxy Wireless in-Car Bluetooth FM Transmitter.
FM transmitters are another alternative. These devices transmit audio over an FM frequency that can be picked up by your car’s radio. The Anker Roav SmartCharge is a top choice that also includes two USB charging ports.
Finally, wireless Bluetooth connections allow you to stream audio from a smartphone without a direct wired connection. Devices like the TaoTronics Bluetooth 5.0 Transmitter plug into your car’s 12V outlet and pair with your phone over Bluetooth.
While not as fast or reliable as a direct USB connection, these wireless alternatives provide workable solutions for listening to music and charging devices when your car’s built-in USB port stops working.
Preventing Future Issues
There are a few key things you can do to prevent USB port issues from occurring in the future:
Be gentle with the port. Avoid yanking cords out forcefully or inserting devices roughly. This can cause physical damage over time. Gently insert USB cords straight into the port without excessive force.
Use short, high-quality USB cables. Long, cheap cables are more likely to fall out of the port when driving and can put strain on the port. Invest in a short, sturdy USB cable designed for automotive use.
Keep the port clean and dry. Dust, dirt, and moisture can build up in the port, causing connection issues. Gently clean the port periodically with compressed air. Avoid pouring water or liquids directly into the port.
Consider using cord adapters or extenders to reduce wear and tear on the built-in USB port. Adapters can act as sacrificial pieces that take most of the strain.
Inspect the port before inserting a device. Look for any obstructions, damage or moisture. If issues are spotted early, steps can be taken to address problems before they worsen.