KEYDIY KD-X4 5-in-1 key programmer and KD-MAX have added support for NCF29AX series (NCF29A1, NCF29A4, NCF29A2, NCF2953, NCF29A3 and NCF2954) chip type synchronization.
This function requires C29AX71 Synchronization‑specialized Key and allows users to read original key data for copying or adding smart keys.
Preparation:
- KEYDIY KD-MAX or KD-X4
- KEYDIY C29AX71 Smart Key (data must be written into it)
- KEYDIY 13# Remote Chip Reading Adapter
- Original key
Note: KEYDIY ZB71-4 smart remote is not for a dedicated copy.
Important Notes
- Update your KD App to the latest version before proceeding.
- This is not a simple read‑and‑copy procedure. Some keys require chip removal and soldering onto the KD board.
- There is no need to generate a remote program before reading key data.
Detailed Operation Instruction:
Step 1: Remove original car key chip
Disassemble the original smart key and carefully remove the NCF29Ax chip.
Step 2: Attach chip to KD #13 adapter
Solder the chip onto KD 13# adapter, then connect the adapter to your KEYDIY KD-X4 or KD-MAX key tool.
Step 3: Read chip data
Navigate to: Remote Function → Smart Key Clone → Universal Smart Key Synchronization
This process synchronizes the original chip’s remote data and key ID to CAX and CA7 series smart keys.
After completion, the key works directly on the vehicle – no additional programming is required.
Alternative method:
Follow the provided wiring diagram to solder wires directly to the key board, read and save the data, then remove the adapter and re-solder the chip back to the original key.
Step 4: Write data to KD C29AX71 Smart Key
Use 6-pin programming cable to connect KD C29AX/C29A7 smart card to KD-X4 key programmer.
Select “Generate dealer keys”
The process will complete successfully.
Then snap the key shell onto KD C29AX71 Smart Remote Key.
Key Advantage:
No need to program the key in the vehicle after writing KD remote.
Simply test both KEYDIY C29AX71 smart remote and the original key to confirm all functions operate normally.
Read more:
KEYDIY KD-X4 Update: New Smart Card Synchronization & C29AX71 Key
