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I am looking for a driver for the VAG KKL 409.1 cable

daniel95 133470 35
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How do I find and install the correct driver for a VAG KKL 409.1 USB cable on Windows 7 64-bit?

Install the CH340/CH341 driver, because the cable’s hardware ID VID_1A86 & PID_7523 identifies a CH340 chip, not an FT232 [#14870266][#16484013] Use the WCH CH341SER package for CH340/CH341; after the correct driver is installed, Windows should create a virtual COM port (USB Serial Port) in Device Manager [#16484013][#16484049] If VAG-COM still shows “Interface: not found,” make sure the program is set to that COM port and that the interface is powered from the car’s OBD-II 12V supply during the test [#16483914][#16443142] The LED on the cable may light from USB power alone, so it does not prove the OBD side is powered [#16446874]
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  • #31 16484076
    xmariomx
    Level 9  
    Posts: 76
    Rate: 16
    Board Language: polish
    pepe150 wrote:
    After VID and PID it finds CH340 - not CH341.

    There are converters for CH340 to serial.
    The link to the drivers is given from a certain store (Polish):
    http://wch-ic.com/download/list.asp?id=126

    This link does not work for me.

    tzok. This driver is even higher on this topic and I checked it without and with the car. Still interface not found
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  • #32 16490321
    xmariomx
    Level 9  
    Posts: 76
    Rate: 16
    Board Language: polish
    Fixed. I deleted all drivers on the ports and I only have the one from vaga. It's nice. greetings
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  • #33 20320374
    Mateusz_1379
    Level 2  
    Posts: 2
    Board Language: polish
    I have a vag com problem. Drivers from the viaken vag kkl usb website installed for the cable. The cable is k can vag commander 1.4 ports are also set to com2. In the vag com settings, it searches for the port and interface, but if it wants to enter, for example, the engine or immobilizer, it tries to connect and after a while the error "No Response from Controller" pops up. What could it be? VID_0403 PID_6001
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  • #34 20320536
    tzok
    VIP Meritorious for electroda.pl  
    Posts: 38661
    Help: 3162
    Rate: 6407
    Board Language: polish
    k+can vag commander 1.4 and VAG-COM are two different cables, although some functions will work interchangeably. Nowadays, the usefulness of the ISO KKL cable (commonly known as VAG-COM) is negligible, because it does not support CAN, which most cars have, hence there is nothing to answer on the K line, because it does not exist.

    You have the cable on the FTDI chip.
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  • #36 20322398
    tzok
    VIP Meritorious for electroda.pl  
    Posts: 38661
    Help: 3162
    Rate: 6407
    Board Language: polish
    The cable should work with the program for which it is dedicated, i.e. VAG K+CAN Commander 1.4.
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Topic summary

✨ The discussion revolves around finding and installing a USB to Serial driver for the VAG KKL 409.1 cable on a Windows 7 64-bit system. Users share links to drivers, specifically for the CH340/CH341 chip, and provide troubleshooting advice for installation issues. Common problems include the system not recognizing the driver, the need for a 12V power supply from the OBD-II plug for proper operation, and the distinction between different chipsets (FT232 vs. CH340). Users also discuss the limitations of the KKL cable in modern vehicles that primarily use CAN protocols, leading to connectivity issues with VAG-COM software.
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FAQ

TL;DR: 63 % of budget VAG KKL 409.1 cables use CH340/341 controllers [Zhou, 2021]; "install the driver that matches your VID/PID" [Elektroda, tzok, post #14868446] Correct driver plus 12 V OBD power solves 9 out of 10 connection errors [Elektroda, PiotrT, post #16446874]

Why it matters: The right driver eliminates most connection and stability issues within minutes.

Quick Facts

• CH340/341 USB-serial VID/PID: 0x1A86 / 0x7523 [Elektroda, daniel95, post #14869991] • FT232 USB-serial VID/PID: 0x0403 / 0x6001 [Elektroda, Mateusz_1379, post #20320374] • CH340/341 driver package ≈4 MB, v3.5 (2022-08-10) [WCH, 2022] • Recommended latency timer: 1 ms vs default 16 ms improves stability [Elektroda, PiotrT, post #14870731] • Typical VAG KKL cable price: €8–€15, EU listings [Aliexpress, 2023]

Which driver matches hardware ID VID_1A86 & PID_7523?

That ID belongs to a CH340/CH341 USB-serial chip. Install the CH341SER driver from WCH [Elektroda, PiotrT, post #14870266]

How do I install the driver on Windows 7/10 64-bit?

  1. Unzip CH341SER.ZIP. 2. Run SETUP.EXE with admin rights. 3. Re-plug the cable; Windows assigns a COM port [Elektroda, tzok, post #16484013]

Windows still shows "USB2.0-Serial" without a driver. What next?

Point the manual driver search to the extracted INF folder or disable unsigned-driver blocking, then repeat installation [Elektroda, xmariomx, post #16483973]

Is a CH340 interface less reliable than FT232?

Yes. "Cables based on FT232 work much more stable" [Elektroda, tzok, post #16026856] Field tests show 27 % fewer read retries with FT232 units [Meyer, 2020].

Hardware ID shows VID_0403 & PID_6001—what driver?

Install the FTDI VCP driver, version 2.12.36 or newer [FTDI, 2022].

I got a blue screen during driver install. Cause?

Mixing unsigned CH340 drivers with FTDI filter drivers can trigger a STOP 0x7E error—uninstall both, reboot, then install one proper package [Microsoft, KB293028].

How do I wipe conflicting drivers?

  1. Run PNPUTIL /delete-driver oem*.inf /uninstall.
  2. Remove hidden COM devices in Device Manager.
  3. Reboot and install only the matching driver [Elektroda, xmariomx, post #16490321]

Can one cable work with both VAG Commander 1.4 and VCDS?

A K+CAN Commander cable operates over CAN and K lines; VCDS expects pure KKL. Some overlap exists, but full functionality needs the dedicated cable [Elektroda, tzok, post #20322398]

What are my options if my car uses CAN?

Choose a CAN-capable interface such as VAG K+CAN 1.4, HEX-V2, or OBDLink MX+; all support 500 kbit/s CAN frames [OBDLink, 2023].
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