Wednesday, 25 March 2026

How to Add VW Audi Porsche 5C/5D Key with Yanhua ACDP & Module 44?

This tutorial provides a concise guide to adding a VW, Audi, or Porsche 5C/5D key using the Yanhua Mini ACDP and Module 44. Follow these streamlined steps to complete the programming process efficiently via OBD and ICP modes.


Preparation & Connection

1. OBD Connection: Plug the ACDP into the vehicle's OBD interface using the OBD cable.

2. Ignition: Turn on the ignition and ensure the instrument cluster is lit.

3. Device Binding: Open the ACDP app and confirm the programmer is successfully bound in the top right corner.


Watch Video Tutorial:


Step 1: Identify Vehicle & Key Information

1. Path: Navigate to VW > VW MQB IMMO(ODO)> MQB49 IMMO(5C/5D).

2. OBD Identify: Select OBD identify info to verify car data.

3. Documentation: Take screenshots of the key ID and quantity for your records.

4. PCF Read: Place the original key into the PCF adapter and click “PCF read key info” to verify its ID.

Note: If prompted, perform an adapter upgrade under "Special Functions> Adapter Upgrade > PCF-KEY Upgrade" before proceeding.


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Step 2: ICP Data Reading & Dealer Key Preparation

1. Disassembly: Disassemble both the original and new keys to access the circuit boards.

2. Read Key Data: Connect the original key plate to the interface board and ACDP. Select ICP+OBD add key > VW 5C Magotan >Step 1: ICP read work key, and save the backup file (ensure it ends in .bin).

3. Write New Key: Replace the original key plate with the new blank key plate. Select Step 2: ICP write new key, load the previously saved .bin file, and click Make dealer key.


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Step 3: Modify Key ID (Optional but Recommended)

1. Function: Go to Special Function > ICP modify key ID.

2. Adjustment: Enter the "lost" key ID found in your previous OBD screenshots.

3. Purpose: This ensures the vehicle can be programmed normally in the future. Do not modify it to the working key ID.


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Step 4: OBD Key Learning

1. Restore: Reassemble the keys with batteries, turn on the ignition, and open the vehicle hood.

2. Start Learning: Select Step 3: OBD Learn key and load the original car data file.

3. Key Quantity: Enter the total number of keys to be learned (e.g., "2").

4. Induction: Place each key near the induction coil one by one as prompted.

5. Confirmation: The instrument cluster will display the learning progress (e.g., 2-2) once complete.


Final Check: Verify that both the original and new keys start the vehicle and operate all remote functions properly.

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Wednesday, 4 March 2026

YANHUA Mini ACDP 2 Cloning BMW BDC2 to BDC3 Encrypted Keys Tutorial

This guide provides a streamlined walkthrough for copying a BMW BDC2 encrypted key to a BDC3 key using the Yanhua Mini ACDP2 with the BDC2 Solder-free Adapter.


Required Hardware:

Main Unit: YANHUA Mini ACDP/ ACDP-2.

Adapter: BDC2 Solder-free Adapter (from BMW Interface Board Kit).

Module: YANHUA ACDP Module 38.


Prerequisites: Software Requirements

Before starting, ensure your software meets the following minimum version requirements:

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Step 1: Prepare and Connect the Original Key

1. Disassemble the original BMW BDC2 car key to access the internal chip.

2. Connect the key to the ACDP BDC 2/3 Interface Board.

3. Set the DIP switch on the adapter to the “BDC2” side.


Step 2: Read and Back up Original Key Data

1. Open theACDP app and ensure your device is bound.

2. Navigate to: BMW > FEM/BDC > IMMO/Mileage > BDC02/BDC03/BCP/LCD-Key (Encrypted Chip) ICP Copy Key> BDC02-KEY(Rectangle main chip) > Read Orig-key Data.

3. Verify and Backup: Confirm the original key information, take a screenshot, and save the data as a .bin file.


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Step 3: Write Data to the New Key

1. Disassemble the new key (this method supports both brand new and secondhand BDC3 keys).

2. Swap Keys: Remove the original BDC2 key from the adapter and replace it with the new BDC3 key.

3. Toggle Switch: Move the DIP button on the adapter to the “BDC3” side.

CAUTION: Do not leave the original key connected during this step, as it may cause data loss or damage.

4. Select Write BDC3-Key (Square main chip) in the app.

5. Load Data: Select the original BDC2 backup file (.bin) based on the correct VIN and Key ID.

6. Follow the prompts to finish writing the data.

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Step 4: Final Assembly and Testing

1. Reassemble both the original BDC2 key and the newly copied BDC3 key.

2. Test both keys inside the vehicle to ensure remote functions and ignition work correctly.


Video guides:


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