Professional-grade replacement smart key exclusively engineered for Toyota Sienna 2010-2019 models! This genuine Lonsdor LT20-05 6-button smart key features a factory-matched 4D chip and 5691 circuit board version.
Effortlessly generate and program it with Lonsdor K518/KH100+ series key programmers.
Why Choose Lonsdor LT20-05 for Toyota Sienna?
✅ Exact Fit for Toyota Sienna 2010-2019
Precision-calibrated for all Toyota Sienna models from 2010 to 2019, with a 6-button layout that matches the original vehicle’s smart key functions (lock/unlock, trunk release, panic, keyless go and more). Equipped with a 4D chip and 5691 board version—100% compatible with Sienna’s factory immobilizer and smart key system, no signal lag or pairing issues.
✅ Superb Quality & Stable Performance
Crafted with genuine Lonsdor components, this smart key boasts industrial-grade build quality for long-term use. It’s engineered to resist daily wear, temperature changes and minor impacts, while delivering consistent remote signal strength and reliable keyless proximity detection—mirroring the performance of the original Toyota Sienna smart key.
✅ Effortless Generation with Lonsdor K518/KH100+
Designed for seamless use with Lonsdor K518/KH100+ series key programmers—the most trusted tools in the automotive locksmith industry. Free and easy one-click generation: simply connect the key to your Lonsdor programmer, follow the on-screen prompts, and finish programming in minutes. No advanced technical skills required, no extra software or activation fees.
✅ 10 Versatile Programmable Functions
Unlock full customization and control with 10 professional functions to tailor the key to your service needs—all accessible via Lonsdor K518/KH100+ programmers:
- Get key version & hardware information
- Read the original button type and layout
- Convert button functions for custom use
- Unlock the key for initial programming
- Upgrade smart key firmware for new features
- Modify remote frequency for regional compatibility
- Smart key data copy for quick duplication
- Convert smart key chip/type for matching
- Modify remote count data for vehicle sync
- Generate an emergency key for backup use
✅ Multi-Spec Adaptability
Supports multiple board numbers, remote frequencies and model variants of Toyota Sienna 2010-2019—eliminating the need to stock multiple key versions for different Sienna batches. Lightweight at just 100g (0.22LB), it’s compact enough to fit in your locksmith tool bag for on-site mobile service jobs, making it a convenient addition to your professional toolkit.
✅ Board numbers
8A : 0010, 0040, 0182, 0410, 2110, 3330, 3950, 0011, 0101, 0350, 0440, 2150, 3410, F43口, 0020, 0120,0351, 2020, 2230, 3450, 6100, 0250, 3041, P7000
4D : 0031, 0140, F433, S0751, 3370, S5290, 5380, 6221, S7210, 7990, 0091, 0310, 0500, 0780, 4610, 5300,5691, 6230, 7930, 0111, A433, 0751, S0780, 5290, 5360, S5801, 6601, 7980
Core Product Specifications：
| Feature | Detailed Information |
|---|---|
| Brand | Genuine Lonsdor |
| SKU | SA2141-05 |
| Fitment | Toyota Sienna 2010-2019 |
| Button Count | 6 Buttons (OEM Layout) |
| Chip Type | 4D Chip |
| Circuit Board Version | 5691 |
| Weight | 100g (0.22LB) |
| Compatibility | Lonsdor K518 / KH100+ Series Key Programmers |
| Main Function | Smart Key Replacement/Spare for Keyless Entry & Immobilizer |
| Condition | Brand New, In Stock |
| Key Feature | 10 Programmable Functions, Stable Signal, Easy Generation |
What’s Included in Your Order？
✅ 1× Genuine Lonsdor LT20-05 Smart Key for Toyota Sienna 2010-2019 (6 Button)
Ready to program with Lonsdor K518/KH100+—no additional parts required for generation!
Simple Programming Steps (For Lonsdor K518/KH100+)
- Power on your Lonsdor K518/KH100+ key programmer and select the Toyota brand.
- Navigate to Sienna > 2010-2019 > Smart Key Generation in the programmer’s menu.
- Connect the Lonsdor LT20-05 key to the programmer (via the dedicated key slot/cable).
- Select your desired function (generate new key, copy data, modify frequency, etc.) and follow on-screen prompts.
- Complete vehicle pairing—your LT20-05 smart key is now fully functional for Toyota Sienna!
Who is this Smart Key for？
This Lonsdor LT20-05 is a professional-grade tool designed for automotive locksmiths, mobile key service technicians, and auto repair shops that service Toyota vehicles. It’s the perfect solution for:
- Replacing lost/damaged original Toyota Sienna 2010-2019 smart keys
- Adding spare smart keys for Sienna owners
- On-site mobile key programming jobs for the Toyota Sienna
- Stocking reliable, OEM-compatible smart keys for common Toyota models
Important Notes：
- This smart key requires Lonsdor K518/KH100+ series key programmers for generation and programming—cannot be used as a standalone key without professional programming.
- It is exclusively for the Toyota Sienna 2010-2019—not compatible with other Toyota models or Sienna years outside this range.
- Genuine Lonsdor product: backed by consistent quality and compatibility with Lonsdor’s industry-leading programming tools.
