Before downloading files, it is crucial to understand what is happening under the hood of your BU-353S4.
If the automated installer does not work, use these steps to manually update through Device Manager: Extract the Files: Unzip the downloaded driver package to a known folder. Open Device Manager: Right-click the button and select Device Manager Locate Device: Find the device under Ports (COM & LPT)
stopped working or showed as an unknown device. The fix involves installing a compatible Prolific driver, even though it may be labeled for Windows 10. Download the Driver: Use the recommended Prolific PL23XX driver installer (e.g., Roadsoft's hosted version GlobalSat site Run the installer ( PL23XX_Prolific_DriverInstaller_v408.zip or similar) to install the driver on your computer. Plug in the Device: Plug your BU-353S4 USB GPS into your computer. Verify/Update in Device Manager: Device Manager Ports (COM & LPT)
For over a decade, this "GPS puck" has been the unsung hero of ship captains, open-source sailors, drone mappers, and digital nomads. But in late 2025, a low hum of panic spread through the navigation forums. The culprit? . G Star Iv Gps Driver Download Bu-353s4 Windows 11
If you search for "G Star IV GPS driver download BU-353S4 Windows 11," you will enter a digital swamp. You’ll find:
Installing a BU-353S4 / G-Star IV GPS on Windows 11 requires identifying the device chipset and selecting the correct signed driver (CP210x or PL-2303). Follow manufacturer downloads, verify COM port operation using a serial terminal, and troubleshoot using the steps above.
After installation and a restart, it's crucial to verify that the GPS is communicating correctly. Before downloading files, it is crucial to understand
Once the Device Manager shows a clean, error-free COM port, you need to verify that the GPS is actually receiving data sentences.
The driver is working and the device has power, but it is still searching for satellites.
Follow these steps for a clean installation. It's a good practice to connect the GPS receiver after the driver installation, but either order is acceptable. The fix involves installing a compatible Prolific driver,
To make the BU-353S4 work flawlessly on Windows 11, you must manually download and install an older, compatible version of the Prolific driver (typically v3.3.2.102 or v3.8.25.0 ) and prevent Windows from auto-updating it. Step 1: Where to Download the G-Star IV BU-353S4 Driver
Yes. "G Star IV" is a marketing name used by GlobalSat and other OEMs. The chipset is the SiRFstarIV (CSR/SiRF).