Problem:
One customer gave feedback that when he connected Keydiy KD-Max with his iPhone, the connection was not possible.
On both devices were BT on and would be detected…
It showed that they were connected via BT, but at this screen he did not see the pairing.
The solution:
KD-Max works completely independently — no phone connection is needed. It performs direct key programming on its own.
Tech support:
Email: sales@OBDexpress.co.uk
WhatsApp: +86 18750906257
This guide explains how to use the KEYDIY KD-X4 Programmer with the Specific Dismantling-Free Clip to add an original BMW BDC03 key. The OEM key must be pre-soldered according to the wiring diagram for this process to work.
Tools Required
Soldered OEM Key
Mobile device with KD App installed
Connection Setup
Programming Steps
Power on the KD-X4 and open the KD App on your mobile device. Go to Bluetooth Settings and connect.
From the homepage, select IMMO Programming → BMW → Select by Type → G/U Chassis BDC3/BCP Anti-Theft System → Start Execution → Verify the wiring diagram and confirm proper connections.
Select Add Key → G Chassis/BDC3 Clone.
Connect the original car key to the KD-X4 via the programming harness.
Tap Read Chip Data → OK. Wait for a successful read.
Swap to the new OEM key and select Original Key(Non-Vehicle).
Confirm and proceed. Once generation is successful, the key is ready to be installed into the key case.
Important Notes
This method offers a dismantle-free, efficient way to program BDC03 keys using KEYDIY tools.
Now Yanhua Mini ACDP1/ACDP2 can support key copy function for 2020–2024 BMW G series BDC3 smart key (Hungary key) /U series BCP ICP key (with and without UWB functionality).
This guide explains how to successfully clone a BMW BDC3 key.
Required Equipment:
Procedure:
Software Installation
Key Verification
Remove key rear cover
Verify: BMW BDC3 key for G-Chassis, Hungary manufacture (2020–2024)
Initial Setup
Launch ACDP II software
Select BMW-> BDC3/BCP ICP Copy Key-> Special Function
Original Key Identification
Choose ‘Identify Key Info by BAV Adapter’
Connect ACDP to BAV adapter
Insert original key-> Read & save key data
Data Extraction
Return to previous menu-> Select ‘Help for G-BDC3 (NCF2953)’
Connect: Original key, BDC3 ICP board, Mini ACDP unit
Select ‘G-BDC3 (NCF2953) -> Read Orig-Key Data’
Verify key information-> Confirm to proceed
Data Backup
Backup key data (.bin format)
Record: File path, date/time, VIN, Key ID
Key Programming
Replace with blank key
Select ‘Write New Key Data’
Important: Original key must be disconnected
Confirm new key is blank
Select original key backup file
Verify original key info-> Write data
Verification
Swap Yanhua ACDP BMW BDC3 ICP board for BAV adapter
Insert new key-> Special Function-> Identify Key Info
Confirm new key data matches original
Done!
KEYDIY now offers PC software that syncs with your Mobile KD account, allowing you to use the KD-X4 Key Tool directly from your computer.
How to download Mobile KD App on smart phone?
How to download & login KEYDIY PC Software?
Visit [https://dlen.keydiy.com/] to download KD TOOLS;
Unzip the package and install PC software;
Open KD TOOLS to upgrade first: includes data, software and firmware updating;
Login KEYDIY account:
Connect KD-X4 to OBD port, then use an OTG cable to link KD-X4 &your PC.
Now, you can start to program keys.
We are pleased to announce a major upgrade to YANHUA ACDP/ACDP2 key programmer.
This upgrade expands new functions for BMW G series BDC2 module.
Newly added:
Update your Mini ACDP2 device now to unlock the new features.
As an automotive technician, I’m always on the lookout for tools that make complex jobs like key programming and immobilizer work more efficient. That’s why I was excited to test the OTOFIX IM2 — a comprehensive diagnostic and key programming kit designed to handle today’s advanced vehicle systems.
What’s in the Kit?
The OTOFIX IM2 Key Programmer comes fully equipped with everything you need to tackle key programming and diagnostics on a wide range of modern vehicles. Included are:
This complete setup means you’re ready to handle everything from Mercedes infrared keys to BMW EWS systems right out of the box.
Key Features That Stand Out
Compares to Autel?
If you’re familiar with the Autel IM608 II, you’ll find the OTOFIX IM2 to be a capable and more affordable alternative. While the Autel unit is excellent, the IM2 delivers similar functionality — especially with its XP1 Pro equivalent — at a fraction of the cost. For shops that need professional-grade performance without the premium price tag, the Otofix is a solid choice.
Final Thoughts
The OTOFIX IM2 is a versatile, well-supported tool that excels in both diagnostics and immobilizer-related services. It’s especially valuable for independent shops and locksmiths who work with a variety of makes and models.
Black Friday Special:
Right now, the OTOFIX IM2 is part
of a Black Friday promotion. Add it to your cart and get 15%
off instantly. It’s an excellent opportunity to upgrade your toolkit
with a professional-grade device at an unbeatable price.
Whether you’re adding keys, cloning ECUs, or resetting airbags, the OTOFIX IM2 is a tool I can confidently recommend.
Autel Black Friday Sale is in full swing at OBDExpress.co.uk now.
Get original Autel diagnostic tool, key programmer, OBD2 scanner, update service, etc at a great discount. Automatically 8% off! No need Coupon!
Sale Periods:
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How to copy BMW G series BDC3 key using APP2 Appro2?
Check the detailed operation guide below.
Preparation:
Only copy BDC3 key made in Hungary. If the original car key is locked (made in Mexico), and it cannot be copied.
Step-by-step guide:
Run APPRO2 software
Select BMW-> BDC2/BDC3/BCP Keys Copy [0051]
Click "Diagram" to check the wiring diagrams
Working key diagrams
New key diagrams
Select the key type- G Series Key
Click "READ WORKING KEY"
Save the key file after reading
When it asks "Do you want to write new key now?" click "No"
Then click "WRITE NEW KEY" option
ATTENTION:
This function is KEY CLONE, the new clone KEY will use the same position of the original key, so don’t put the new key and the original key together in car (you can move out the battery).
Click "OK" and load the working key IMMO file
Check the IMMO information and click "OK" to write the new key
Connect the new key by diagram, and click "OK" to continue
Wait a while until the original key file is written to the new key successfully by APPRO2
Done!
Read also:
http://blog.obdexpress.co.uk/2025/09/05/which-tool-add-key-to-bmw-g-series-bdc3-immo-system/
This article walks you through the process of compressing and sharing your Yanhua ACDP/ ACDP2 project folders from both Android and iOS ...
