Use VirusTotal to scan any third-party archive before extraction.
By downloading the PSA Interface Checker V3, you gain full manual control over your hardware. You can downgrade or upgrade the firmware version at will to match the exact requirements of your software environment without relying on Diagbox’s unpredictable automatic updates. Key Features of Version 3
If you open the PSA Interface Checker and receive an error like "Initiation Failed" or "Device Not Found" , check the following:
The PSA Interface Checker is a lightweight utility used to manage the firmware of your Lexia 3 / Diagbox VCI (Vehicle Communication Interface). It is primarily used to identify your device’s current hardware revision and to upgrade or downgrade its firmware for compatibility with different versions of Diagbox . Key Features
Install PSA Interface Checker Install.exe to create desktop shortcuts. Psa Interface Checker V3 Download
Instantly reads your interface serial number and current firmware version.
: Restores device functionality if a "clone" interface was accidentally updated via the internet, which often disables the device. Revision Switching : Used to upgrade interfaces from Revision B Revision C
Obtain the official PSA Interface Checker V3 package through your authorized dealer network or Stellantis partner portal. Ensure you have a valid diagnostic subscription where required.
Click on the or Read Info button to establish a connection. Use VirusTotal to scan any third-party archive before
, which is necessary for full compatibility with newer vehicles and later versions of Diagbox (v7.02 and above). System Requirements & Setup Operating System : Typically requires Windows XP (32-bit) Windows 7 (32-bit)
: Some versions allow configuring the interface for use with other applications, such as legacy Opel-Vauxhall software via J2534. Download Resources
Click the Activate button to let the software recognize the interface.
Whether your Lexia 3 interface is recognized as a or Revision C device. The operating system version you are currently running. Share public link Key Features of Version 3 If you open
: Enables users to "force" a specific firmware version to match a chosen Diagbox version (e.g., using v4.3.4 for Diagbox 7.66+). Download and Installation
Click the or Read Version button. The application will query the USB port and display your current settings:
: Open Windows Device Manager and confirm the interface is detected under the USB controllers section. How to Use PSA Interface Checker V3
: When using this tool with "clone" interfaces, it is strongly advised to disconnect the internet to prevent the hardware from being blacklisted by official servers during the update process.