VAG immobiliser emulator schematic diagram

Project of immobiliser Emulator for VW, Audi, Seat and Skoda vehicles.

Fast, easy and cheap solution for emulate immobiliser in case of defect Immo Box, Transponder Coil etc. in old VAG vehicles (Immo-1 and Immo-2). Presented solution is used from many years. It has some drawbacks, but is simple, tested and working. Project based on AT89C2051 microcontroller and can be modified in many ways. Working emulator, in the basic version can be assembled within several minutes.

Here you can download a binary file for programming AT89C2051 for this project.

Schematic diagram version 1

Component list:

• Cx: 10uF
• R2: 100k
• R1, R2: 10k
• Trigger: 74HC14
• Microcontroller: AT89C2051
• X1: 11.0592MHz
• T: simple NPN transistor (BC547 etc)

Schematic diagram version 2

Component list:

R2: 4.7K

R1, R3, R5: 10K

Microcontroller: AT89C2051

X1: 11.0592MHz

T: simple NPN transistor (BC547 etc)

Cx : 220nF*

Immobiliser emulator installation guide for audi a4, a6, a8 with white immo box (4A0953234, 8D0953234)

1. Disconnect the Immo Box.
2. Connect W-Line (pin 9) with K-Line (pin 10) in wiring connector and connect it to W-Line of Immo Emulator.
3. Connect GND (pin 11) to Immo Emulator.
4. Connect IGNITION (pin 12) to power supply of Immo Emulator.

Immobiliser emulator installation guide for vag 6-pin immo box (5wk4678, 5wk4590, 1h0953257)

1. Disconnect the Immo Box.
2. Connect W-Line (pin 3) with K-Line (pin 2) in wiring connector and connect it to W-Line of Immo Emulator.
3. Connect GND (pin 4 and 6) to Immo Emulator.
4. Connect IGNITION (pin 1) to power supply of Immo Emulator.

Immobiliser emulator installation guide for vag 8-pin immo box (6h0953257, 7mo953257aa)

1. Disconnect the Immo Box.
2. Connect W-Line (pin 7) with K-Line (pin 8) in wiring connector and connect it to W-Line of Immo Emulator.
3. Connect GND (pin 4 and 5) to Immo Emulator.
4. Connect IGNITION (pin 2) to power supply of Immo Emulator.