KEYDIY KD-X4 covers 51+ mainstream vehicle brands and supports over 1200 vehicle models, including European, American, Asian, and commercial heavy-duty vehicles. It continuously updates new car models via official online upgrade.
1. European Brands
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BMW: Official support for BMW BDC2 / BDC3 / BCP / LCD smart key no-disassembly adding function, compatible with Rolls-Royce and Toyota SUPRA BMW-platform vehicles.
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VW / Audi / Skoda / Porsche: Official support for latest VAG MQB49 / 5C / 5D anti-theft system key adding and all-key-lost programming, supports MQB dashboard and BCM data read & write.
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Volvo: Supports Volvo semi-smart key and 8A smart key programming, CEM control unit data reading and programming.
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Other European Brands: Full basic IMMO programming, chip recognition and remote generation for Mercedes, Peugeot, Citroën, Renault, Opel and more European vehicles.
2. Asian Brands
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Toyota / Lexus: Official exclusive support for Toyota 4D/8A/4A chip series programming, 2019+ Toyota Rollin-Code bypass, used key unlock-free programming, smart key and blade key all-key-lost solutions.
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Honda / Nissan / Mazda / Mitsubishi / Suzuki: Full coverage of remote copy, chip identification, key generation and IMMO matching for mainstream Japanese vehicles.
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BYD: Professional support for BYD new energy smart key all-key-lost acquisition, OBD48 programming and multi-mode antenna collection adaptation.
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Hyundai / Kia: Full system remote duplication, chip matching and smart key programming for old and new Hyundai & Kia models.
3. American Brands
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Ford: Supports Ford rolling-code remote copy, full-series chip matching and exclusive Ford alarm cancellation function.
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Other American Brands: Complete basic key programming, remote generation and chip cloning for Chevrolet, Cadillac, Jeep, Chrysler and more American vehicles.
4. Commercial Vehicles
5. Full List of Supported Brands
Toyota, Lexus, VW, Audi, Skoda, Porsche, BMW, Rolls-Royce, Volvo, Ford, Honda, Nissan, Mazda, Mitsubishi, Suzuki, Hyundai, Kia, BYD, Peugeot, Citroën, Renault, Opel, Chevrolet, Cadillac, Chrysler, Jeep, Fiat, Jaguar, Land Rover, Isuzu, Daihatsu, Chery and more than 51 brands in total.
6. Core Supported Anti-Theft Systems
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BMW BDC2/BDC3/BCP, VAG MQB49/5C/5D, Toyota 4D/8A/4A, MLB chip system, CANFD protocol vehicles, 24V heavy truck system.
Official Unique Compatibility Query Tutorial
The official web compatibility query page is permanently closed. The only 100% authoritative, valid, and real-time updated official channel is the KD App. No offline PDF model lists or public detailed model tables are released by KEYDIY. All KD-X4 vehicle compatibility and function support results are subject to KD App real-time database data.
1. Step-by-Step Official Query Tutorial
Step 1: Install and log in to the official genuine
KD App (the only official mobile software of KEYDIY).
Step 2: Enter the Vehicle Coverage / Car Model Query functional module.
Step 3: Select device dimension: KD-X4, filter exclusive upgraded functions of X4.
Step 4: Complete vehicle brand, model, year selection and confirm the anti-theft system.
Step 5: Real-time query out valid supporting functions and adaptation notes.
2. Official Quick Pre-Judgment Standard
Before official query, you can quickly judge adaptation according to KD-X4 official core supported anti-theft systems:
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BMW: Fully compatible with vehicles equipped with BDC2 / BDC3 / BCP / LCD smart key systems.
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VAG Series (VW/Audi/Porsche): Supports MQB49 / 5C / 5D new generation IMMO system vehicles.
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Toyota/Lexus: Supports 4D / 8A / 4A chip system models, with exclusive roll code bypass and used key unlock-free programming functions.
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Commercial Vehicles: Exclusive programming adaptation for all 24V heavy-duty trucks.
KEYDIY KD-X4
/KD-MAX key programmer now fully supports cloning for all BMW BDC2/BDC3/BCP and VAG 5C/5D keys. Follow this straightforward guide and tips to execute this feature successfully.Important Notes: VAG 5C/5D operations do not require KD-MP tool
. With KD-X4: Directly read original key data and perform key learning. With KD-MAX: Read key data using KD-MAX, then learn via KD-MATE
.For MQB49 5C/5D:
- Activation of MQB license is required (same as MQB48 license). No points are needed for adding keys.
- 5C: Compatible with KD ZB smart keys or original keys.
- 5D: Compatible with original keys only.
- Both 5C & 5D are compatible with second-hand original keys.
For BMW G Series Encrypted Keys (BDC2/BDC3):
- Activation of BMW G function license is required.
- No points needed to generate keys.
- Process: Read original key data.
- Generate dealer key and service code.
Use service code to learn key in the vehicle.
- Obtain IMMO data from a working key and read sync data afterward. Use the Keydiy KD-X4 key programmer to extract the CS from the key. With that CS, you can retrieve the synchro from a working key.Simple Guide to Read BDC2 Encrypted Display Key:
Preparation:
· Keydiy KD-X4/KD-MAX key programmer
· Original BDC2 encrypted key
· New original BDC2 key or KD FGB58 remote
· New dedicated wiring harness
· KD G Function license activation Ensure KEYDIY KD-X4 programmer firmware is updated to V1.52 or higher.
Use the wire soldering method with a modified KD adapter.
Read original BMW BDC2 encrypted display key data (e.g., 2018 BMW 7 series G12 740Li BDC2).
Only 5 minutes
Authoritative Disclaimer
All system-level function descriptions on this page are based on KEYDIY official release content. No offline detailed model list or available web query channel exists. The final vehicle compatibility and usable functions are only subject to the real-time query results of the official KD App. The official database is continuously updated with new vehicle models and system permissions.
KEYDIY official does not release detailed year-by-year and model-by-model PDF lists. All vehicle compatibility must be queried through the official KEYDIY mobile app (KD App), which is the only authoritative and real-time updated support database.X4 Exclusive New Functions: Industry-leading UWB detection, MLB chip detection, 24V heavy truck programming, SFD unlock, Toyota used key unlock-free programming and CANFD protocol support.
