Programmable Smart Key Circuit Board for Toyota Lexus Lonsdor LT20-01 8A 4D LT2001J0
One Lonsdor LT20-01 universal four-button smart-key circuit board for professionally configured Toyota and Lexus applications. Supports selection of 4D or 8A smart-key type, compatible frequency and button functions using supported Lonsdor equipment. Supplied as a bare electronic board, not an assembled or pre-programmed key fob.
Fitment and compatibility
- Model: LT20-01 / LT2001J0; photographed board marking: LT20-01(B)
- Supported original-board families include 3370, 0140, A433, F433 and 5290, subject to the exact configuration available in the current Lonsdor software
- Verified application examples include appropriately equipped 2015 Lexus RX350 and RX450h with a supported original smart-key board
- For other Toyota/Lexus applications, have a qualified locksmith verify the original board number, transponder type, frequency, modulation, button configuration and vehicle coverage in their updated Lonsdor equipment before purchase
This programmable board has no single fixed vehicle interchange or factory FCC/part-number identity. It must be configured for the matching vehicle system before programming. Do not order solely by vehicle year/model, case appearance or an 8A/4D label. It is not a universal plug-and-play replacement for all Toyota or Lexus vehicles, nor a conventional ignition-key transponder.
Equipment and contents
- One LT20-01 circuit board with four tactile switches and coin-cell holder
- CR2032 battery required; battery not included
- No outer key housing, emergency blade, key programmer, software subscription or vehicle-programming service included
- Requires compatible, updated Lonsdor K518-series or KH100+ equipment for supported board configuration; vehicle registration may require additional vehicle-specific equipment or access
Installation and programming
For professional use. Verify physical fit in the intended housing and confirm that the programmer supports the exact vehicle and operation. Configure the correct key type, frequency and controls, then complete authorized vehicle-specific programming before use. Supported functions depend on software, equipment and the vehicle's existing factory features; this board does not add remote start or other unsupported features.
Photos show different views of the same board, not multiple supplied boards. Compatibility data describes supported configurations, not a guarantee of every model year or market.
