Question 1

Are you licensed and insured to do smart key work on a 2012 Toyota Sienna?

Accepted Answer

Yes. EZ Car Keyz holds a California BSIS locksmith license (LCO#6792) and carries full liability insurance. For a smart key vehicle like the 2012 Sienna, that matters more than it sounds. Programming the fob to this vehicle's immobilizer requires the right diagnostic equipment and proper credentials. Not every locksmith advertising Toyota key service actually has what's needed for the smart key trims. If a shop can't explain what tools they're using or can't give you a real quote over the phone for your specific trim, that's a signal worth paying attention to.

Question 2

How do I know EZ Car Keyz is a legitimate business and not one of those bait-and-switch locksmiths?

Accepted Answer

The bait-and-switch pattern is always the same: a vague low quote on the phone, a big number once you're stuck and they've got your car open, and no real answers about your specific vehicle. Legitimate shops give you a real number for your exact job before showing up.

We have a verifiable business name, a California BSIS license number you can look up, and video content across YouTube and TikTok showing the actual work on actual vehicles. Ask any locksmith calling you back: what fob does the 2012 Sienna XLE use, and what does programming it actually involve? If they fumble that, hang up.

Question 3

Will a replacement smart key work exactly like my original factory key?

Accepted Answer

It should, and we verify that it does before leaving the job. When a new fob is properly enrolled into the vehicle security system, it communicates with the immobilizer the same way the original does. The vehicle starts, the remote functions work, the touch handles respond if your trim has them. We walk every function on-site.

The reason that matters: there are cases where a key gets cut and paired but specific remote features don't get tested, and the owner only finds out something's off later. We don't hand you the key and drive away. You see every button work before I close my toolkit.

Question 4

I have a spare key that hasn't been used in years. Can it still be programmed, or does it expire?

Accepted Answer

An unprogrammed fob blank doesn't expire sitting in a drawer. The transponder chip inside has no battery drain, no internal clock counting down. If it's the correct fob for your trim and it's never been paired to a vehicle, it can still be enrolled. The CR2032 inside a pre-assembled fob might be weak or dead by now, but that's a battery swap, not a fob problem. Bring it out, we test it, and if it's the right blank we can work with it.

Question 5

My 2012 Sienna starts fine but the door handles stopped responding to the smart key. Is this a fob problem or something on the vehicle side?

Accepted Answer

If the push-button start still sees the fob and the engine cranks, the fob is almost certainly fine. The touch-sensor door handles on the Sienna smart key trims are their own weak point. They're exposed, they get dirty, and the sensor elements can degrade over time, especially on a vehicle that's seen a lot of use in a border-area environment where dust, humidity, and heat cycle constantly.

First thing to try: clean around the handle sensor area and retest. If one door responds and another doesn't, that isolates it to the non-responding door's hardware or wiring, not the fob. If none of the handles respond but the start button still works, that points toward the door-side antenna loop or handle sensors rather than the fob or the immobilizer. That's a different diagnosis than a key replacement job, and I'll tell you that when I arrive rather than sell you a key you don't need.

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