2010 Lexus RX Key Replacement

The 2010–2015 RX uses the same key setup, so everything on this page applies to those years too. The full picture is on the Lexus RX key guide.

2010 Lexus RX: 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

HYQ14ACX smart fob (GNE board 271451-5290). Catalog listings disagree on the chip inside this fob — most describe it as 'DST+'/DST80, but at least one lists DST40 — so we match replacements by the fob's FCC ID and board number, not the chip label. All-keys-lost is handled via OBD smart-code reset with professional tools, and reused OEM fobs need an immobilizer reset.

What kind of key does a 2010 Lexus RX use?

The 2010 RX is a push-to-start vehicle. Its key is a smart proximity fob, which means the car senses the fob nearby and you never insert anything to start the engine. The fob we match for this year is the HYQ14ACX, built around a board numbered 271451-5290. Tucked inside the fob is a mechanical backup key blade, there for the day the fob battery dies or the car can't read the fob.

For an owner, that setup changes a few things. The hidden blade can get you into the door, but it will not start the car by itself. And because the fob is a smart fob rather than a plain bladed key, a lost one is a costlier replacement than you may expect. The problems we see most on this year are simple ones:

A dead fob battery, where the dash reports 'key not detected' even though the fob is in your pocket
A lost fob, which means buying and programming a smart fob rather than cutting a blade
A water-damaged or crushed fob, often from a pocket trip through the wash or a drop under a tire

Duplicate a fob or replace after all keys are lost?

If you still have one working fob, duplicating is the simpler route. For this setup an original key is needed for duplication, so keep the fob you have until we're done. We program the new fob through the car's OBD port, and this year does not call for a NASTF SDRM login to do it.

If every fob is gone, that is still workable. All keys lost on a 2010 RX is handled through an OBD smart-code reset using professional tools, so the car does not have to be towed anywhere just to get a key made. It takes more steps than a duplicate, which is why it sits higher on the cost side.

One warning if you are shopping online for a used fob: a reused OEM fob is already paired to some other Lexus. It needs an immobilizer reset before your RX will accept it. We can do that, but a used fob is not a plug-and-play shortcut, and it is worth calling us before you buy one.

How we handle a 2010 RX key job, step by step

The order of work is the same whether you are in a parking garage or in your driveway. Our mobile vans come to you, and the storefront at 10740 Wilshire Blvd in Westwood is there if you would rather bring the car in.

You call (213) 577-1366 and tell us the year, the model, and whether you have a working fob left.
We confirm the car by VIN and, if you have a fob, read its FCC ID and board number so we match the right replacement.
We check that you are the owner before any key is made.
We cut the mechanical backup blade if the new fob needs one.
We program the fob through the OBD port, running the smart-code reset or immobilizer reset when the situation calls for it.
We test everything: push-to-start, lock and unlock, and the backup blade in the door.

Locked out or need a locksmith now?

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

Call (213) 577-1366

What affects the price of a 2010 Lexus RX key?

We don't quote numbers in a web page, because the honest answer depends on your situation. Here is what moves the cost up or down:

Whether you have a working fob. Duplicating is generally lighter in cost than all keys lost.
The fob itself. A smart fob costs more than a bladed key, and a new one differs from a reused OEM unit that needs a reset.
The blade. The hidden mechanical key may need cutting.
Where the car is. A mobile visit differs from bringing the car to the storefront.
Whether you need a new key at all. If the only issue is a dead battery, swapping the battery is usually the more economical route and no programming is involved.

What we confirm by VIN on this fob

Catalog listings disagree on the chip inside the HYQ14ACX. Most describe it as DST80, sometimes labeled 'DST+', but at least one lists DST40. We haven't verified which is right for every 2010 RX, so we don't match by the chip label. We match by the fob's FCC ID and board number, and we confirm the details by VIN or in person before programming.

Why call us: Wilshire Lock & Key has been in business since 1987, with a storefront and mobile vans run as one company, so there is no dispatch middleman between your call and the technician. David, the owner and lead technician, oversees the work. California requires locksmith companies to hold a BSIS LCO license, and you should ask any locksmith for theirs.

For the wider picture, see our Lexus RX key page or the full Lexus key guide. If you are ready to get moving, contact us or just call.

Frequently asked questions

Does a 2010 Lexus RX have a transponder chip?

Yes, it has an immobilizer system, and the smart fob carries the electronics. Catalog sources mostly describe the chip as DST80, though one lists DST40. Because that is unsettled, we match by FCC ID and board number and confirm by VIN.

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

Not necessarily. A dead fob battery is the most common cause. Try the mechanical backup blade to get in, and call us. If the battery is the cause, replacing it is usually the more economical route.

Can you make a key if I lost every fob?

Yes. All keys lost is possible on this year. We use an OBD smart-code reset with professional tools, so no dealer visit is needed to get a working fob.

Do you need my existing fob to make a copy?

For duplication, yes, an original key is needed. If you have no working fob, we handle it as an all-keys-lost job instead.

Can I buy a used Lexus fob online and have you program it?

Often yes, but a reused OEM fob needs an immobilizer reset first because it's paired to another car. It is worth calling us before you buy so we can check that it matches your RX.

Does the hidden key in the fob start the car?

No. The mechanical backup blade opens the door. Starting the car requires a programmed smart fob to be detected inside.

Where do you work on 2010 RX keys?

We serve 140 cities across Los Angeles and Ventura counties with mobile vans, and we have a storefront at 10740 Wilshire Blvd in Westwood. Phone lines at (213) 577-1366 are answered 24 hours a day, 7 days a week.

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.