Many locksmiths are familiar with the EoneBoss TLK series, but one question keeps coming up:
What’s the difference between EoneBoss TLK1, TLK2, and TLK3?
Although these three tools are designed to work together, they serve different purposes. Understanding how each one works will help you choose the right tool for Toyota and Lexus key programming.
TLK1 and TLK2 Are Emulators, Not Unlock Tools
One common misconception is that TLK1 and TLK2 unlock OEM keys.
In fact, they do not unlock keys.
Instead, they work as key emulators, allowing the original OEM key to be reused during the programming process.
TLK1
TLK1 is designed for Toyota/Lexus 8A OEM smart keys.
During key programming, TLK1 temporarily emulates the original key so the vehicle accepts the programming procedure while keeping the factory key reusable.
TLK2
TLK2 works exactly the same way but is designed for
Toyota/Lexus 4A OEM smart keys.
Like TLK1, it serves as an emulator rather than an unlock device.
What Does TLK3 Do?
Unlike TLK1 and TLK2, TLK3 performs multiple functions.
Function 1: Collect Key Information
TLK3 can collect important data required for generating a replacement key.
Place the device near the vehicle’s ignition coil to capture chip information.
Then place it near the gear selector to collect remote frequency data.
Using this information, compatible software can generate a universal key with the correct:
- Chip type
- Remote frequency
This simplifies key preparation before programming begins.
Function 2: Unlock Certain OEM Keys
The biggest difference is that TLK3 is capable of unlocking supported OEM keys.
To determine whether a key can be unlocked, check the P14 value.
P14 = 00
The key is identified as a Toyota OEM key.
These keys still require TLK1 key unlocking device as an emulator.
P14 = 02
The key is identified as a Lexus OEM key.
These also rely on TLK2 during programming.
P14 = 04 / 06 / 08
These OEM keys can be unlocked directly using TLK3.
This is the primary unlocking function that distinguishes TLK3 from the other two devices.
Future Software Enhancements
According to EoneBoss, future updates will further expand TLK3’s capabilities.
A planned feature will allow users to search by OEM part number, automatically retrieving:
- Chip type
- Remote frequency
- Other key generation parameters
This will make creating compatible replacement keys even faster and reduce manual identification work.
comparison:
| Tool | Main Function | Supported Keys |
| TLK1 | Emulator | Toyota 8A OEM keys |
| TLK2 | Emulator | Toyota/Lexus 4A OEM keys |
| TLK3 | Key data collection + OEM key unlocking | Supported OEM keys (P14 = 04 / 06 / 08) |
TLK1 and TLK2 help preserve and reuse original OEM keys by acting as emulators.
TLK3 not only collects key generation data but also unlocks compatible OEM keys and continues to gain new functions through software updates.
Choosing the correct EoneBoss TLK1 key unlocking device depends on the key type you’re working with, making it an essential part of an efficient Toyota and Lexus key programming workflow.