Lonsdor LT21-04 Smart Key PCB Board No.0250 8A-B6 4 Button Changeable Frequency 312.09 314.35 433.58 434.42 MHz

Product Overview

The Lonsdor LT21-04 is a 4-button universal smart key PCB board built for 2025+ Toyota and Lexus proximity key systems. This listing highlights its changeable frequency design: the board supports 312.09/314.35 MHz and 433.58/434.42 MHz bands and ships with 312.09/314.35 MHz as default, so key service workshops can cover vehicles operating on either band with one stock-keeping unit.

Why Changeable Frequency Matters

Toyota and Lexus proximity keys use different frequency bands across markets and model years. A changeable-frequency PCB allows locksmiths to prepare one board type for multiple vehicles instead of holding separate part numbers, simplifying inventory and shortening customer waiting time.

Key Features

• 4-button layout for 2025+ Toyota and Lexus proximity key fobs
• 8A-B6 chip platform with board No. 0250 support
• Frequency options: 312.09/314.35 MHz and 433.58/434.42 MHz
• Default frequency 312.09/314.35 MHz ready for direct programming
• Programmable with Lonsdor K518, K518PRO and KW100 devices
• ABS body with stable structure for daily workshop handling

Technical Specifications

• Model: Lonsdor LT21-04
• Board No.: 0250
• Chip: 8A-B6
• Buttons: 4
• Support Frequency: 312.09/314.35, 433.58/434.42 MHz
• Default Frequency: 312.09/314.35 MHz
• Supported Vehicles: 2025+ Toyota and Lexus proximity key models
• Supported Programmers: Lonsdor K518, K518PRO, KW100
• Battery: Not included
• Shell: Sold separately (contact us)

Before You Order

Confirm the original key PCB board number (0250) and the vehicle frequency band before programming. Smart keys and PCBs are non-returnable once programmed; send us the vehicle model and year so we can confirm suitability before shipment.

Quality and Shipping

Each board is inspected for button response, chip read/write and frequency output before shipment and packed in an anti-static bag with bubble wrap inside an export-grade carton. MOQ: 10 pieces. We keep regular stock for Lonsdor key products and dispatch within 3-7 working days.