: Primarily caused by driver overwrites from Windows updates or security mismatches with the clone hardware. : Perform a clean reinstall: uninstall VCDS, delete the C:\Ross-Tech folder, and reinstall the compatible version. Prevention
The Kolimer loader acts as a translation bridge. It allows standard Windows environments to recognize custom HEX-V2 or HEX+CAN diagnostic hardware without triggering digital signature blocks or authentication failures.
“Failed 2” is not a bug in the loader – it’s a sign that the cat‑and‑mouse game between Ross‑Tech and the clone scene has moved on. Kolimer’s loader worked beautifully for VCDS versions up to ~2021. For anything newer, you’ll spend more time wrestling with “Failed 2” than diagnosing a car. Either freeze your software stack in time, or invest in the genuine tool.
If the test passes, click to lock in the configuration.
"Failed 2" error in the Kolimer VCDS loader typically indicates a communication breakdown between the loader software and the diagnostic cable's hardware, often caused by an anti-virus deletion firmware mismatch
and firewall or add the entire VCDS installation folder and the loader executable to your exceptions list 32-bit vs. 64-bit Installation vcds loader kolimer failed 2
Open , find the Ross-Tech device under "Universal Serial Bus controllers," right-click it, and select Uninstall device , ensuring "Delete the driver software for this device" is checked.
Windows security settings blocked the loader from modifying the system memory required to bypass hardware checks. Step-by-Step Solutions to Fix the Error
+-------------------------------------------------------------+ | HOW THE FIX RESTORES SYSTEM FLOW | +-------------------------------------------------------------+ | [PC / Loader] ----> [FTDI Chip (EEPROM)] ----> [ATMEGA162] | | (Fixed Drivers) (Rewritten PID/VID) (Reflashed FW) | +-------------------------------------------------------------+ Required Hardware and Software Tools
: You cannot contact Ross-Tech for help; you are reliant on forum members or the original seller for troubleshooting. The Bottom Line
Which (Windows 10 or 11) is on your laptop? : Primarily caused by driver overwrites from Windows
: Always use the specific VCDS version provided by the cable seller.
Right-click the item and choose , checking the box for "Delete the driver software for this device." Unplug the cable, wait 5 seconds, and plug it back in.
If the steps above do not clear the error, your interface likely suffered an internet-based firmware revocation. To recover from a bricked EEPROM state on an ATMega162 chip, you will need a dedicated EEPROM burning kit or a hardware-level recovery archive (such as the VCDS Clone Repair Kit). Target Parameter Value Core processing unit governing code execution. USB Interface Chip FTDI FT232RQ / FT232BL Go to product viewer dialog for this item. Manages serial-to-USB laptop communication protocols. EEPROM Hex Utility MProg 3.5 or VAGCOM EEPROM Tool Overwrites corrupted vendor configuration registers. Target Loader Version Kolimer Loader v9.2
The "failed 2" error with the Kolimer VCDS Loader, while disheartening, is a well-known issue with solutions that are simple to apply. By following the troubleshooting guide in order—starting with disabling your antivirus, performing a clean installation, and running everything as an administrator—you will resolve the issue in the vast majority of cases. For the few stubborn cases, checking your Windows components or trying a different loader version will almost certainly get you back on track. With a methodical approach, you'll soon be past the splash screen and performing advanced diagnostics on your VAG vehicle.
If the loader keeps disappearing, your antivirus is deleting it. Open your antivirus software. It allows standard Windows environments to recognize custom
The "VCDS Loader Kolimer Failed 2" error typically occurs when using non-genuine or "clone" HEX-V2 interfaces with the VCDS software. This error often indicates that the loader cannot properly communicate with the interface hardware or that the software environment is blocking its execution. Potential Solutions Antivirus Interference
Follow these systematic steps to restore your VCDS clone cable functionality. 1. Whitelist the Loader in Windows Defender
Click on to see if VCDSLoader.exe was recently blocked or quarantined.
still show up in Windows Device Manager when you plug it in? Vcds Loader Kolimer Failed 2 Updated