[Solution] My 2021 Toyota Highlander won’t start - key code lost

2348 views - Last reply: May 04, 2025
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Trying to program a new key - where's the key code on my 2021 Toyota Highlander?

Hello! We've developed a VIN-based tool to help you get your key code for the 2021 Toyota Highlander. Check it out here: VIN Key Code Generator.

Replies (6)

Will this work for older 2021 Toyota Highlanders? Mine's a 2009.

I’m stuck in a parking lot with my 2021 Toyota Highlander. Trying this now.

Can’t believe this worked on my 2021 Toyota Highlander. Huge thanks!

I’ve been locked out of my 2021 Toyota Highlander all week. Hope this helps.

Appreciate any advice—my 2021 Toyota Highlander won’t recognize the key.

Still can’t find the code for my 2021 Toyota Highlander. This might do it.

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Locksmiths are typically 30-50% cheaper than dealerships for key replacement and programming. However, some newer models (especially luxury brands) may require dealer-only programming tools. Always get quotes from both.
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Locksmiths or dealers can: 1) Decode your door or ignition lock to determine key cuts 2) Access your car's key code through manufacturer databases (with proof of ownership) 3) Program new transponder keys using diagnostic equipment.
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Many cars have a resync procedure: 1) Press lock/unlock buttons while near the car 2) Insert key and turn ignition on/off in a specific pattern 3) Use a sequence of button presses. Check your manual for exact steps - procedures vary widely by manufacturer.
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