Audi TT / Beetle Login Reader II — quick PIN read for early VAG clusters
Lightweight Windows tool that reads the immobilizer login (PIN) from early Audi TT (8N) and VW New Beetle via a simple K-line interface (COM port). Handy for cluster/key adaptation and ECU matching on Immo2/early Immo3 platforms.



Highlights

• Direct PIN read — displays the 4/5-digit immobilizer login.
• K-line / COM — works with common KKL interfaces assigned to COM1…COMx.
• One-button workflow — select port → Start → readout in seconds.
• Minimal setup — portable executable, no heavy dependencies.

Typical use cases

• Cluster replacement or ECU swap on Audi TT 8N and VW New Beetle
• Key adaptation when original login is unknown
• Verifying immobilizer data before programming

Quick start

• Install your KKL/K-line driver and note the assigned COM port.
• Ignition ON, connect to OBD.
• Select the correct ComPort in the app and press Start.
• The Login (PIN) field will populate; record it for adaptation.

Compatibility & notes

• Target: Early VAG immobilizer systems (Audi TT 8N, VW New Beetle; K-line).
• Interface: KKL/K-line (FTDI/CH340) mapped to a Windows COM port.
• Limitations: Newer CAN-based clusters and late Immo3/Immo4 systems are not supported.

System requirements

• OS: Windows 7 / 8 / 10 / 11 (32/64-bit)
• CPU: Dual-core 2.0 GHz or better
• RAM: 2 GB (4 GB recommended)
• Extras: KKL/K-line interface with stable 12V supply

Tested on Windows 10 LTSC (2019); also runs on Windows 7/8/10/11.

Good practice

• Keep a battery support/charger connected during communication.
• Note the PIN securely; never share vehicle security data publicly.

Disclaimer
This post summarizes features from public info and your screenshot for educational/archival purposes. Any files, if referenced, are hosted by third parties; our forum does not host or distribute software and is not responsible for external content. Use only in accordance with local laws and OEM policies.