eyDIY offers several tools for automotive locksmiths and key programmers, including the KD‑X4, KD‑MAX, and KD‑MP.
Although they belong to the same ecosystem, each device serves a different purpose and targets different levels of professional use.
This guide provides a clear, modern comparison of all three devices, helping technicians choose the right tool for their workflow.
1. KD‑MAX
KD‑MAX is a standalone Android-based smart device designed for remote generation, transponder operations, and key cloning.
Main Functions
- Remote generation (KeyDIY remotes)
- Transponder reading, cloning, and editing
- Remote frequency detection
- Remote simulation
- Works with KD‑MATE for VAG MQB/MLB operations
- Works with KD‑X4 for advanced cloning
Advantages
- Large touchscreen interface
- No need for a smartphone
- Faster workflow for daily locksmith operations
- Supports more advanced functions when paired with KD‑MATE
Limitations
- Cannot perform EEPROM work
- Cannot generate remotes without KD remotes
- Some advanced cloning still requires KD‑X4
2. KD‑X4
KD‑X4 is a compact, USB/Bluetooth transponder and remote tool designed to work with the KeyDIY mobile app.
Main Functions
- Transponder reading and cloning
- Remote frequency detection
- Remote generation (via mobile app)
- ID48 cloning (online)
- Works with KD‑MATE for MQB/MLB
- Works with KD‑MAX as an accessory
Advantages
- Affordable
- Portable and easy to carry
- Ideal for mobile locksmiths
- Supports most KeyDIY functions through the app
Limitations
- Requires a smartphone
- No screen or standalone operation
- Fewer built‑in features compared to KD‑MAX
3. KD‑MP
KD‑MP is a multifunction programmer designed for more advanced operations, including EEPROM and chip-level work.
Main Functions
- EEPROM reading and writing
- Chip programming
- Transponder generation
- Remote generation
- Works with KD‑X4 and KD‑MAX
- Supports more advanced locksmith tasks
Advantages
- Best option for technicians who need EEPROM-level access
- Expands the capabilities of KD‑MAX and KD‑X4
- Supports a wider range of chips and modules
Limitations
- More expensive
- Not needed for basic remote generation
- Requires more technical knowledge
Which One Should You Choose?
Choose KD‑X4 if you want:
- A low‑cost, portable tool
- Basic remote and transponder functions
- App‑based workflow
Choose KD‑MAX if you want:
- A standalone device with a screen
- Faster workflow without a phone
- A professional daily-use tool
Choose KD‑MP if you want:
- EEPROM and chip-level programming
- The most advanced capabilities
- A full professional locksmith setup
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