Yanhua ACDP Module 44: VW Audi Porsche 5C/5D Key Adding Tutorial

 Programming a new VW, Audi, or Porsche 5C/5D (MQB49) key is now streamlined with the Yanhua Mini ACDP 2 and Module 44. This guide provides a professional, step-by-step walkthrough for adding a key using a combination of OBD and ICP modes.

Initial Setup & Connection

Before starting, ensure your hardware is properly connected to avoid data interruptions.

• OBD Connection: Plug the ACDP 2 into the vehicle’s OBDII port.
• Ignition: Turn the ignition ON; the instrument cluster must be active.
• App Binding: Open the ACDP app and verify the device is successfully bound in the top-right corner.

Check Video Tutorial

https://www.youtube.com/watch?v=3b2Kp8-LHrc

Step 1: Identify Vehicle & Key Data

• Navigate Path: Go to VW > VW MQB IMMO(ODO) > MQB49 IMMO(5C/5D).
• OBD Identify: Select OBD identify info to verify car data. Tip: Screenshot the Key ID and quantity for later reference.
• Verify Original Key: Place the working key into the PCF adapter and select PCF read key info to confirm its ID.

Note: If prompted, perform a "PCF-KEY Upgrade" under Special Functions first.

Step 2: ICP Data Reading & Dealer Key Preparation

This stage involves reading the internal data of the working key to prepare the new one.

• Disassemble Keys: Remove the circuit boards from both the original and the new blank key.
• Read Working Key: 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. Save the resulting .bin file.
• Create Dealer Key: Replace the original plate with the new blank key plate. Select Step 2: ICP write new key, load your saved .bin file, and click Make dealer key.

Step 3: Modify Key ID (Recommended)

To ensure future programming compatibility, it is best to align the new key ID with the vehicle’s records.

• Go to Special Function > ICP modify key ID.
• Enter a "lost" key ID from your earlier OBD screenshots.
• Warning: Do not modify it to match the ID of the currently working key.

Step 4: OBD Key Learning

The final step syncs the prepared keys to the vehicle’s immobilizer system.

• Restore: Reassemble the keys (with batteries), turn the ignition ON, and open the vehicle hood.
• Start Learning: Select Step 3: OBD Learn key and load the original car data file.
• Input Quantity: Enter the total number of keys (e.g., "2").
• Induction: Hold each key near the vehicle’s induction coil one by one as prompted.
• Confirmation: The dash will show the progress (e.g., 2–2). Test both keys for engine start and remote functions.

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Lonsdor K518 Pro BMW BDC3 VAG MQB49 5C 5D Wiring Diagrams

 Lonsdor K518 Pro Full Version, combined with Encrypted Solder-Free Adapter Kit, enables encrypted data reading for BMW G/U chassis systems (BDC2, BDC3, BCP, and LCD), as well as smart key reading for VW/Audi 5C/5D and Porsche 5D systems.

Important:

K518 PRO full version must be within active subscription period. K518 Pro FCV requires active BMW BDC License and VW MQB49 5C 5D License.

You’ll find the related wiring diagrams listed below for your reference.

For BMW G-Chassis /U-Chassis with LCD Screen:

For VW 5C/5D

For Audi 5D

For Porsche 5D

Learn more:

http://blog.obdexpress.co.uk/2026/02/23/lonsdor-k518-pro-update-support-bmw-bdc3-vag-mqb49-5c-5d/

How to Use J2534 Function with CG FC200?

 Question: Can CG FC200 ECU Programmer be used for PCM Flash via J2534?

Answer:

Yes, this function has been added in the latest software version 1.3.5.0 in March. It works with UDS, CAN, and KWP2000 protocols.

If a PCM hardware box is not available, FC200 can act as one, allowing communication with modules when used with PCM Flash software.

Simple guide to use CG FC200 J2534 function:

Once FC200 software is installed, open "Settings", enable the J2534 switch, and click "Apply"

Make sure you have the following:

• PCM software (compatible with both official and unofficial versions)
• PCM security dongle
• PCM drivers

Please note: These are not included with CG products. Customers must purchase them separately.

Connections:

Refer to the standard FC200 wiring diagram. Vehicles with an OBD port support data reading via OBD.

FYI…

CG FC200 V1.3.5.0 New Features & Updates

1.J2534 Function Added

Currently supports UDS, CAN, and KWP2000 protocols

2.BOOT Mode ECU Support (Requires DAP Adapter)

Hyundai: DELPHI DCM3.7AP R5F72544R

Mercedes-Benz: CONTINENTAL VGS4–0-NAG2 R5F72544R

3.Clone Data Conversion & IMMO Data Parsing Functions Added

Coaster / Volkswagen: BOSCH ME17.5.22 TC1724

Audi / Porsche / Volkswagen: BOSCH EDC17CP54 TC1793

Audi / Hyundai / Kia / Porsche / SEAT / Coaster / Volkswagen: BOSCH EDC17CP14 TC1796

Audi / SEAT / Coaster / Volkswagen: BOSCH EDC17C74 TC1793S, EDC17C64 TC1797, MED17.5.21 TC1782, MED17.5 TC1766, MED17.5.25 TC1782, MED17.5.20 TC1766, MED17.5.5 TC1766

SEAT / Coaster / Volkswagen: BOSCH ME17.5.20 TC1767, EDC17U01 TC1766

Audi / Porsche / Volkswagen: BOSCH EDC17CP44 TC1797

Audi / Porsche / SEAT / Coaster / Volkswagen: BOSCH EDC17CP04 TC1796

Audi / SEAT / Volkswagen: BOSCH MED17.1 TC1796, MED17.5.2 TC1767

Audi / Volkswagen: BOSCH EDC17CP24 TC1796, EDC17C54 TC1797

Volkswagen: BOSCH EDC17CP74 TC1793S

4.New ECU Types Added

BAIC / Bestune / BYD / Changan / Cirelli / Dongfeng / FAW / Feidi / Geely / Great Wall / JAC / Foton / SAIC / Soueast / GAC / Wuling: MG1UA008 (Bootloader mode)

BMW: MSV80 (Bench mode — no ECU opening required)

Hyundai / Kia: BOSCH MEG17.9.8 TC1767 (Bench mode)

Hyundai / Kia: BOSCH MEDG17.9.8 TC1767 (Boot mode)

Yuchai: DCM7.1AP

5.VIN Repair Function Added

BMW MEV17.2.2 now supports VIN modification

6.Language Support Expanded

Added German and Russian to FC200 interface

7.Bug Fix

Resolved flash writing failure in BOOT mode for certain Toyota 76F00xx ECUs

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Autel IM508, IM608 Add VW MQB49 5C/5D Key Guide

Autel MaxiIM IM508 and IM608 series is able to add key to VAG MQB49 5C/5D now.

XP400/ XP400 PRO programmer and APB113 adapter board are required. (Review here)

Follow this guide to learn how to add key successfully.

VAG MQB49 5C 5D Support Vehicle List

Audi

A3 (2021–), A5 (2025–), A6 (2026–), Q4 (2022–), Q5 (2025–), Q6 (2023–), Q8 (2024–)

Skoda

Fabia (2022–), Superb (2020–), Kodiaq (2020–), Octavia (2021–), Enyaq (2021–), Kushaq (2021–), Kamiq (2021–), Karoq (2020–)

Seat

Leon (2020–), Tarraco (2019–), Formentor (2021–), Born (2022–), Tavascan (2024–), Ibiza (2018–), Arona (2018–), Ateca (2020–)

Volkswagen

Multivan (2020–), Arteon (2020–), Atlas (2020–), Caddy (2021–), CC (2019–), Crafter (2020–), Golf (2020–), Jetta (2019–), Nivus (2021–), Passat (2022–), Polo (2020–), Taigo (2022–), Taos (2021–), T-Cross (2019–), Teramont (2019–), Tiguan (2019–), Touran (2020–), Transporter (2020–), T-Roc (2020–), Vento (2020–), Virtus (2020–), ID.3 (2022–), ID.4 (2021–), ID.5 (2021–), ID.7 (2024–), ID.Buzz (2023–)

Important Precautions

Before diving into the programming process, keep these points in mind:

The original car key must be present on-site.

Required hardware: a compatible programmer (XP401 / XP401Pro / XP400 / XP400Pro / XP1 Pro, etc.), an APB113 board, and a new key.

Pay close attention to the key board type and follow the correct wiring method for that specific type.

During key learning, keep all other keys outside the vehicle to prevent signal interference.

Main steps

1.Read Vehicle Information — Pull the VIN, current key IDs, and other essential data through the OBD port.

2.Read IMMO Data –Take apart the original key and use a programmer with an adapter to read its immobilizer information.

3.Make Dealer Key –Create a new dealer key using the immobilizer data obtained from the original.

4.SFD Unlock –For 2024 models and later, perform an SFD (Vehicle Diagnostic Protection) unlock before moving forward.

5.Key Learning –With the immobilizer data and dealer key ready, complete the process by learning the key(s) to the vehicle.

Step-by-Step Guide:

Step 1: Read Vehicle Information

On your Autel diagnostic tablet, select Volkswagen, then navigate to:

Expert Selection → Key Reading via Dump → Key Reading via Dump for 5C or 5D

Connect the tablet to the vehicle via OBD and run the function to read vehicle information.

The system will show details such as:

• Current key ID
• Key ID1 (hex)
• Key ID2 (hex)
• VIN

Carefully follow any on-screen instructions.

Step 2: Read IMMO Data

Two options are available; this guide uses the Programmer (APB113) method.

Select Programmer (APB113) and follow the operation guide.

Remove the PCB from the original key.

Refer to the guide to identify the key board type, then connect the PCB and APB113 adapter as shown in the wiring diagram.

Mount the adapter onto your programmer (e.g., Autel XP400 Pro, XP401).

Important: Ensure the programmer is connected to a 12V power source and linked to your tablet.

Click OK to begin reading.

Once successful, the system will display the file name and save location for the immobilizer data. Jot this down — you’ll need it in the next steps.

Step 3: Make Dealer Key

You can choose either wireless or wired. This example uses the wired method.

Select Make Dealer Key (Wiring) to enter the submenu.

Choose Programmer (APB113).

Remove the PCB from the new key and connect it according to the wiring diagram.

Connect the key PCB, APB113, XP400 Pro, and your Autel IM508S/IM608S tablet.

Click OK, then load the immobilizer data (.bin file) saved in Step 2.

Step 4: Learn new Key

Load the same immobilizer data file used in Step 2.

Select the key type: YES for smart keys, NO for mechanical keys.

Enter the total number of keys to program (including the original).

Follow the on-screen prompts to program each key.

Reminder: Keep all other keys away from the vehicle during this process to avoid interference.

Once finished, the new key(s) will be successfully programmed to the vehicle.

That’s it — you’ve just added a key to a VAG MQB49 5C/5D vehicle using an Autel IM508II or IM608II series device.

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VW 5C/5D IMMO Guide: Autel vs Xhorse vs Lonsdor vs KEYDIY Solutions

 Looking for the best tool for VW MQB49 5C/5D key programming in 2026? This professional comparison reviews the latest VAG IMMO updates from Autel, Xhorse, Lonsdor, and KEYDIY based on official technical releases. As Volkswagen, Audi, and Skoda transition to 5C and 5D encryption, selecting the right hardware — such as the Autel APB113, Lonsdor ADP-40, or Xhorse Remote Key(XS series) — is critical for safe key adding on 2024–2026 models.

Autel: APB113 No-Solder Solution

Autel provides a specialized workflow for MQB49 5C/5D through its IM series tablets.

• Core Update: Support for 5C (IKEY & OEM keys) and 5D (OEM keys only) key adding.
• Hardware Requirement: IM508 II/IM608 + XP400 Pro + APB113 Adapter.
• Technical Detail: The APB113 adapter is essential for reading IMMO data directly from the original key PCB without soldering, supporting models up to 2026 (A3, Golf 8, ID series, etc.).
• Best For: Users prioritizing a guided, hardware-assisted "No-Solder" process.

Xhorse: Cost-Effective XS Series Support

Xhorse focuses on software optimization to support new protocols using existing hardware.

• Core Update: Key Tool Plus V4.3 firmware update for MQB49 (5C/5D) Add Key.
• Capabilities: 5C supports generation via XS Series Universal Smart Keys. 5D currently supports Original Keys.
• Key Advantage: Unlike competitors requiring new chips, Xhorse allows the use of standard XS series remotes for 5C, significantly lowering tool and consumable costs.
• Best For: Locksmiths seeking the lowest entry cost for 5C key programming.

Lonsdor: ADP-40 & Credit System

Lonsdor offers a robust hardware expansion for high-encryption VAG and BMW modules.

• Core Update: Launch of the ADP-40 Adapter for MQB49 5C/5D and BMW BDC3/BCP.
• Licensing & Cost: Functions are included in the K518 Pro Full subscription. A Credit system is used for operations (e.g., 160 credits for 5C/5D), featuring a 10% rebate on successful jobs.
• Hardware Feature: The ADP-40 provides a solder-free interface for reading encrypted data, ensuring module safety.
• Best For: Professionals managing a mix of high-end BMW and VAG workloads.

KEYDIY: Specialized FGB25–5 Sub-Machine

KEYDIY utilizes dedicated hardware to handle the complexities of the 5C/5D protocols.

• Core Update: Introduction of the FGB25–5 Dedicated Smart Key.
• Capabilities: Supports 5C/5D remote generation for VW, Audi, and Porsche. It is also compatible with BMW BDC2/BDC3 and BCP systems.
• Hardware Requirement: Compatible with KD-X4 and KD-MAX.
• Best For: Locksmiths who prefer dedicated sub-machines for specific high-security encryption types.

Quick Technical Summary Table

Brand5C Consumable5D ConsumablePrimary Hardware RequiredAutelIKEY / OEM KeyOEM KeyIM608 + XP400 Pro + APB113XhorseXS Series RemoteOEM KeyKey Tool Plus (V1.4.3)LonsdorLT20 / OEM KeyOEM KeyK518 Pro + ADP-40KEYDIYFGB25–5FGB25–5 / OEMKD-MAX / KD-X4

Professional Guidance for Users

• To minimize hardware risk: Use the Autel APB113 or Lonsdor ADP-40 for safe data extraction without soldering.
• To minimize consumable cost: The Xhorse XS Series remains the most economical choice for 5C protocols.
• For 5D Protocols: Currently, most tools (Autel, Xhorse) prioritize the use of Original (OEM) Keys for successful programming.

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How to Add 2014 BMW X4 Smart Key with Lonsdor K518 Pro?

 Understanding how to program a 2014 BMW X4 smart key with Lonsdor K518 PRO is essential for automotive locksmiths looking for an efficient OBD-based solution. This technical guide covers the complete procedure for adding a new key to the CAS4/CAS4+ system without the need for complex pre-processing in most cases.

Preparation & Tools Required

• Lonsdor K518 PRO Key Programmer
• OBD Communication Cable
• Original Working Key
• New BMW Smart Key

Step-by-Step Instructions

System Identification

• Connect the K518 PRO to the vehicle via the OBD communication cable.
• Navigate to the menu: Immo & Remote > BMW > Select from type > CAS4/CAS4+ > Method 2 (OBD).

Read CAS & Key Data

• Select "Read Key Data" to allow the tool to analyze the current vehicle status.
• Turn on the ignition switch when prompted.
• The system will automatically check if the vehicle requires pre-processing; for the 2014 X4, this is typically not required.

Backup Coding (Safety Step)

• Select: Backup and Restore Code > Backup Code.
• Ensure the ignition is on and save the file with a recognizable name.
• Once the "Backup Successful" message appears, return to the main menu.

Generate Dealer Key

• Select "Make Dealer Key".
• Turn on the ignition switch and the hazard warning lights.
• Choose an empty key position (e.g., Key Position 4).
• Select: Immo Coil Generation > Have Original Key

Key Induction & Learning

• Place the original working key near the car’s induction coil and click OK.
• Immediately hold the new smart key close to the induction coil.
• Wait for the device to finish "Writing New Key." Do not move the key during this process.
• A success message will appear once the dealer key is generated and locked.

Verification & Testing

• Check the device screen to ensure the ID for key position4 is now displayed.
• New Key: Press the brakes and the Start button. The engine should start successfully.
• Original Key: Repeat the process to ensure the original key still functions perfectly.

By following this OBD-based method, adding a smart key to a 2014 BMW X4 with the Lonsdor K518PRO is a streamlined and secure process.

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