Question 1

What is the cheapest way to handle all-keys-lost on my 2015 Lexus ES?

Accepted Answer

Call a mobile locksmith before you call the dealer or a tow truck. All-keys-lost on the ES is a real job with a real process: the vehicle's security system gets reset through the diagnostic port, new fob or fobs get registered, and the emergency insert blade gets cut to your vehicle. The reset on this generation has a timed sequence built in, so the job takes longer than a simple spare key add. Expect somewhere around 45 minutes to an hour on site.

The dealer route means towing, a service write-up, and waiting. We come to you in Lakeside Proper, quote you on the phone, and that is the number you pay. No tow, no surprise charges.

Question 2

Can you delete a lost or stolen fob from my 2015 Lexus ES so it can no longer start the car?

Accepted Answer

Yes. When we do a security reset, every previously stored fob ID gets wiped from the vehicle's system. Only the keys you authorize during that session get registered. A lost fob that was once paired to your car will not start it or unlock it after the reset is done.

The dealer calls this process a reseed. We do the same thing on site without the tow. If you still have one working key and just want to wipe a lost second key, that is a shorter job than all-keys-lost. Worth doing if the fob went missing somewhere it should not have.

Question 3

Does my 2015 Lexus ES smart key have a hidden emergency blade inside it?

Accepted Answer

It does. There is a small release tab on the fob body. Press it and the metal blade slides out. That blade fits the driver door cylinder and lets you get into the car manually when the fob battery is dead or the passive entry is not responding.

A couple of things worth knowing: the blade is specific to your vehicle's locks, not a universal cut. If your blade is worn, broken, or missing, we can pull your key code and cut a replacement that fits your locks correctly. Also, if the battery is completely dead and you are using the blade to get in, the vehicle's security system may still flag the entry. Starting the car will typically require holding the fob itself against the start button so the system can read the transponder chip at close range. That is normal behavior on this generation.

Question 4

I added a second fob to my 2015 Lexus ES and now the original one stopped working. What happened?

Accepted Answer

This comes up on Lexus owner forums more than people expect. The vehicle's security system on this generation stores a limited number of registered keys. If a programming session was not done correctly, or if the wrong procedure was followed, it is possible to overwrite the original key's registration while adding a new one.

It is also possible the original fob's battery or contact gave out at the same time as the programming job, which makes it look like the programming caused the problem when the two things are unrelated.

Either way, the fix is a fresh registration session that includes both fobs. Both get enrolled at the same time so neither one gets bumped. If you had someone program a spare and now your daily driver fob is dead, bring both fobs when you call me. I will get them both registered and verified before I leave your driveway.

Question 5

My 2015 Lexus ES starts fine but the trunk release button on the fob stopped working. Do I need a new key?

Accepted Answer

Probably not. If the car starts and the door functions still work, the fob is communicating with the vehicle. A single button failing usually points to the button itself, not the key system.

On this fob, the trunk release button is the one that sees the most repeated use after lock and unlock. The rubber button pad can wear and lose contact with the circuit board underneath. Sometimes it is visible as a flat or sunken spot on the button. A locksmith or electronics shop can replace the button pad without replacing the whole fob.

If all four buttons stopped at once, that is a different story and points toward the battery or a registration issue. But one button going while the rest work is almost always mechanical wear on that specific button.

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