Choosing between the KeyDIY KD‑X4 5-in-1 Key Programmer and CGDI A2 depends on your needs. The KD‑X4 offers wide vehicle coverage and universal key programming, ideal for general locksmith work. The CGDI A2 focuses on BMW and Mercedes, providing advanced functions like module coding and mileage adjustment. Here’s a table comparing their main features.
| Device | CGDI A2 | Keydiy KD-X4 |
| Operation | Tablet, Standalone | Based on App or PC software |
| Primary Focus | IMMO matching, key programming for specific brands; frequency detection | Universal key/remote recognition, remote generation, copying, simulation, key programming |
| Connection | WiFi, USB | Bluetooth/OTG to mobile/tablet (KD App); USB to PC; USB |
| Language | English, Chinese | App supports Multilanguage, 19 languages |
| Subscriptions | No Annual Subscription.
Optional Mercedes FBS3 license; free daily tokens for some functions |
No annual subscription.
Points/tokens for advanced functions (e.g., BMW add-key: 200 points/$4); app-based license purchases |
| Vehicle brands | Supports password-free and disassembly-free matching for most vehicle models. | 56+ brands |
| Detect frequency | Yes | Yes |
| ID48 96bit cloning | – | Yes, 100 KD coins or 10 USD per calculation |
| BMW Immobilizer | Yes, CAS1-CAS4, FEM/BDC, BDC2
(Not yet support BDC3) |
Yes, BMW CAS1-CAS4, FEM/BDC, BDC2, BDC3.
FEM/BDC, BDC2 and BDC3 require same license. 5000KD coins or 150USD. |
| Benz Immobilizer | With FBS3 license.
Supports EIS, calculate password, Read/write key, Benz ELV, ECU and gateway functions. |
– |
| VAG MQB48 & MLB | MQB48 yes, MLB No | Yes, need to activate MQB48 and MLB license.
Each MLB add key require 200 KD coins. |
| Audi BCM2 encrypted key programming | – | Yes, 2500KD Coins/75USD to activate license |
| Volvo CEM | Yes | Yes, 3500 KD-Coins/50USD to activate license |
| Toyota 8A Blade key AKL | Yes | Yes with 8A blade key AKL cable |
| Toyota 8A smart key programming | Yes, Toyota 8A/4A smart key | Yes |
| Jaguar Land rover 2018-2024 Key programming | – | Yes, supports JPLA / K8D2 / J9C3 / M9R3 systems |
| BYD all keys lost | Yes | Yes, 100 KD coins each time |
| Program Toyota second hand key without unlocking | – | Yes, 200 KD coins or 5 USD |
| Generate remote | – | Yes, generate KD remote |
| Remote Unlock | – | Yes |
| Yamaha ID47/ID49 motorcycle key barcode retrieval | Yes | |
| Nissan B18 28-digit pin code | With 40-PIN cable to bypass pin code. | Yes |
| CAN FD protocol | Yes | Yes |
In Sum:
- Standalone vs Device Requirement: CGDI A2 works standalone, while KeyDIY KD‑X4 requires a PC or mobile device.
- Mercedes-Benz FBS3 Support: CGDI A2 offers optional FBS3 immobilizer functions, which is its key advantage; KD‑X4 does not support Benz FBS3.
- Key Tool Features: KeyDIY KD‑X4 provides more key tool functions, such as unlocking remotes and generating KD remotes, which CGDI A2 lacks.
- Subscription and Costs: CGDI A2 does not require an annual subscription, and most functions are free. Some KD‑X4 functions need license activation and single-use fees.
- Device Coverage: These two tools are different; having both provides broader vehicle coverage.
