KEYDIY KD-X4 Key Programmer is a versatile 5-in-1 automotive tool that supports programming for a wide range of vehicle systems, including BMW BDC2 and BDC3 platforms. Below are frequently asked questions covering authorization, compatibility, functions, and usage.
1. Authorization and Payment
Q: Do BDC2 and BDC3 authorizations require credits or payment?
A: Both authorizations are activated together. You can use K-coins if available; otherwise, payment is required.
Q: Is there a list of K-coin costs for different key types?
A: Yes. Standard keys require 20 K-coins, while smart keys require 30 K-coins.
2. Regional Restrictions
Q: Is the KD-X4 region-locked? Can it be used in Taiwan?
A: There are no regional restrictions. The device can be used globally, including Taiwan.
3. Adapter and Compatibility
Q: Do I need to purchase the BM(G)-BDC2 Adapter?
A: Yes, but you must first complete real-name verification and activate the BMW function.
Q: Can KEYDIY BDC2/BDC3 keys be used with Xhorse devices?
A: No. BMW keys are only compatible with KEYDIY or OEM equipment.
4. Vehicle Support
Q: Does the KD-X4 support key programming for the G20 (BMW 3 Series)?
A: Yes, as long as the key is not locked. The G20 uses the BDC3 platform. If not listed in the menu, navigate by type.
5. UWB Function
Q: Can the KD-X4 copy UWB-enabled BCP keys? Does it require an OEM key or KD’s FGB?
A: Currently, only OEM keys are supported. This feature is enabled via app updates. Overseas UWB support is expected by October 31, 2025.
Q: How can I tell if a BMW U-key has UWB?
A: UWB-enabled keys have the code “CA” (high-end), while non-UWB keys are labeled “CG” (low-end). Low-end keys can be reliably programmed using KD’s FGA key.
6. Chip Programming
Q: Does the KD-X4 5-in-1 support reading and programming the KD D26 chip?
A: Yes.
7. Device Locking
Q: Can the KD-X4 be locked by serial number, for example, in cases of fraud?
A: Yes, but this function is reserved for clear cases of fraud, such as non-payment after delivery.
8. All-Keys-Lost Support
Q: Does the KD-X4 currently support all-keys-lost for BDC2?
A: Not at this time.
9. Account Management
Q: What if a customer’s account is deleted and K-coins are lost?
A: Users must prove ownership of the original account (e.g., via linked Twitter account). After verification, K-coins can be merged into a new account.
Conclusion
KEYDIY KD-X4 offers robust functionality for modern key programming, with ongoing updates to expand vehicle coverage and features. Always ensure your device and app are up to date to access the latest capabilities.