2007 Lexus LS Key Replacement

The 2007–2008 LS uses the same key setup, so everything on this page applies to those years too. The full picture is on the Lexus LS key guide.

2007 Lexus LS: key facts

Key type: Smart / proximity key
Push-to-start: Yes
Transponder chip: Varies by trim — we confirm by VIN
Programming: OBD
All keys lost: We can originate new keys on site

LS460: smart key and push-button start standard from launch. Catalogs confirm the HYQ14AAB fob (board 0140) but rarely name the chip (one catalog lists the 4D-71 smart chip); this first-generation smart system is DST40-based by industry convention, so we leave it unverified. All-keys-lost on early Lexus smart systems historically meant resetting or replacing the smart ECU or a dealer visit; current professional tools usually reset the smart code via OBD — coverage confirmed per vehicle.

What kind of key does a 2007 Lexus LS use?

The 2007 LS (the LS460) came with a smart key and push-button start as standard from launch. There is no key to turn in an ignition. The car senses the fob when it is nearby, and you press the start button. The catalogs we check list the fob as the HYQ14AAB with a board numbered 0140. Inside the fob is a mechanical backup key, so the car can still be opened if the fob goes dead.

Smart fobs like this one are not cut-and-copy keys. A new fob has to be paired with the car's smart system by programming. For this model year that is done through the OBD port under the dash, not by any procedure that requires a dealer-only credential on our end.

The problems we see most often on this setup are simple to describe:

A dead fob battery. The dash reports 'key not detected' even though the fob is in your pocket.
A lost fob. Replacing a smart fob costs more than replacing a bladed key, and the reasons are covered below.
A water-damaged or crushed fob that no longer talks to the car.

Duplicate or all keys lost: what changes on this car?

If you still have a working fob, making another is the easier job. Duplication on this setup requires an original key, so the car can be programmed to accept the new fob while the existing one stays in the system. It is usually the more economical route, and it is worth doing before the last fob goes missing.

If every key is gone, it is still possible to make a new one. The history is worth knowing, though. On early Lexus smart systems, an all-keys-lost situation often meant resetting or replacing the smart ECU, or a trip to the dealer. Current professional tools usually reset the smart code through the OBD port instead, which avoids replacing parts. We confirm that coverage for your specific car before we start, so you are not told yes and then surprised.

Here is how we handle a 2007 LS call:

You call (213) 577-1366 and tell us the model year, whether you have any working fob, and where the car is parked.
We confirm the vehicle by VIN so we know which fob and which programming path apply.
If a fob still works, we use it as the original. If not, we plan an all-keys-lost reset through the OBD port.
We supply the replacement fob, program it to the car, and test start, lock, unlock and the backup key.
If the problem turns out to be only a weak fob battery, we say so rather than sell you a new fob.

Locked out or need a locksmith now?

We answer around the clock, every day of the year.

Call (213) 577-1366

What affects the cost of a 2007 LS key?

We will not quote a number on a page, because the real price depends on your situation. These are the factors that move it:

Whether you have a working fob. Duplicating from an original is lighter-cost work than rebuilding the key set from nothing.
The fob itself. A smart fob is a circuit board and a sealed case, which is why it costs more than a bladed key.
Whether the smart code can be reset by OBD on your car, or whether the case needs more work. We confirm this per vehicle.
How many fobs you want programmed. Adding a spare during the same visit usually makes more sense than a second trip.
Where the car is. Our mobile vans come to you, and a car brought to our Westwood storefront at 10740 Wilshire Blvd removes the travel from the job.

What we have not verified, and how we handle it

Here is the honest part. For this year we have not verified the transponder chip. Catalogs confirm the fob but rarely name the chip. One lists a 4D-71 smart chip. Industry convention says this first-generation smart system is DST40-based. We list that as unverified because a convention is not the same as a confirmed part, and we would rather tell you that than guess.

In practice, this means we confirm by VIN and by looking at the car in person before we order or program anything. If something does not match what the catalogs suggest, we tell you before work begins. Check the fob you have against the owner's manual as well, since that is what the car was built for.

If you are comparing locksmiths, ask each one for their California BSIS LCO license number. The state requires locksmith companies to hold that license, and a legitimate company will give it to you without hesitation.

Why call Wilshire Lock & Key for a Lexus LS

We have been in business since 1987, and our storefront is in Westwood with mobile vans that serve 140 cities across Los Angeles and Ventura counties. When you call, you reach us, not a dispatch middleman who passes the job to a stranger. David, the owner and lead technician, oversees the work. The phone is answered 24 hours a day, seven days a week, at (213) 577-1366.

For more on this model across other years, see our Lexus LS key pages or the wider Lexus key replacement section. If you would rather send details first, use the contact page.

Frequently asked questions

Does a 2007 Lexus LS have a push-button start?

Yes. The LS460 came with a smart key and push-button start as standard from launch, so the car reads the fob by proximity instead of a turned key.

My LS says 'key not detected.' Do I need a new fob?

Not necessarily. A dead fob battery is a common cause of that message. It is worth ruling out first, and we will tell you plainly if a battery is all it needs. A water-damaged or crushed fob is the other usual cause.

Can you make a key if I lost every fob?

Yes, all-keys-lost replacement is possible on this setup. Current professional tools usually reset the smart code through the OBD port. We confirm coverage for your specific car by VIN before we begin.

Is the transponder chip confirmed for this year?

No. The chip is unverified. Industry convention points to DST40 for this first-generation smart system, but catalogs rarely name it. We confirm by VIN and in person rather than assume.

Does the fob have a mechanical key inside?

Yes, the 2007 LS fob includes a mechanical backup key, which lets you get into the car if the fob stops working.

Do I need to bring the car to you?

No. Our mobile vans come to you, or you can bring the car to our storefront at 10740 Wilshire Blvd in Westwood. Call (213) 577-1366 and we will help you decide which suits your situation.

We cover all these cities

Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.

Last updated 2026-10-11.