A smart key is the type of key your 2012 Lexus LX uses. It contains a programmed chip that communicates with your vehicle's immobilizer system to verify it is an authorized key before the engine will start. It also has 4 buttons for remote lock, unlock, and other functions. When a key breaks, the chip inside may still be functional, but the physical damage usually means a full replacement is the safest option to avoid getting stranded again.

2012 Lexus LX
BBB A+ Rated Key Service in Ventura County

Q: My Lexus says key not detected. What do I do?

First, try holding the fob directly against the start button and pressing. Your Lexus can power the transponder chip like an RFID tag even when the fob battery is completely dead, so this works indefinitely as long as the chip is healthy. If that gets the car started, replace the battery with a fresh name brand CR1632. If holding the fob to the button does not work, the issue may be the key itself or the vehicle's reception module. Some GX460 owners found that a software configuration setting had disabled smart key reception, and simply turning it back on fixed the problem without replacing anything.

Q: What is the FCC ID for the 2012 Lexus LX key?

The FCC ID is HYQ14AAB, HYQ14AEM. This is the identifier printed on the back of your key fob that tells us exactly which key your vehicle requires. It ensures we match the correct blank, chip frequency, and remote protocol so the key programs correctly on the first attempt. If your existing key is damaged and you cannot read the FCC ID on the back, give us your VIN and we can look it up to confirm the right replacement.

Q: Is all-keys-lost more expensive than a regular replacement?

Yes. When you have at least one working key, adding a spare is a quick programming job. When every key is lost, the Lexus smart key computer needs to be fully reset and new keys programmed from scratch. An LS430 owner reported the dealer quoting $1,500 for all-keys-lost versus a few hundred for a spare key when a working key was present. Locksmiths in the same area quoted $350 to $600 for the same AKL job. The gap between add-a-key and all-keys-lost is real, which is why we always recommend getting a spare made while you still have a working key.

1,000+ Five-Star Reviews | Certified Pros

Available Wednesday

Smart Key

CA BSIS LICENSE LCO#6792

BBB A+ Rated Licensed & Bonded Certified Techs

Fast Response15-25

min arrival

1,000+reviews

Call (805) 790-8162 Text Us

NASTF Certified

National Automotive Service Task Force approved

No Tow Required

We come to wherever the car is sitting

Best Price Guaranteed

Specialized in keys only, no overhead markups

805 Special

10% OFFCODE:EZ-805-2026

🔥 5-star service at a discount 🔥

REDEEM (805) 790-8162

2012 Lexus LX
Key Options

BSIS licensed, NASTF certified, Google Guaranteed

Push To Start

No Lexus Key? See Your Best Option

No key? See which option gets you driving faster

EZ Car Keyz

Dealership

Average Cost

✓ $$

✕ $$$$

Location

✓ We come to you

✕ You drive there

Wait Time

✓ 20-45 min

✕ 2-5 days

Same-Day

✓ Yes

✕ Rarely

All Keys Lost

✓ No problem

✕ Tow required

OEM Quality

✓ Yes

EZ Car Keyz wins 5 out of 6

All keys lost is no problem for us

Emergency Call (805) 790-8162

2012 Lexus LX Smart key Replacement - Fast, Affordable & Professional

I've been replacing Lexus keys in Oxnard for over 8 years. My YouTube channel has over 113,000 subscribers watching real jobs on real cars, including IS, ES, RX, GX, NX, and GS models. Not stock footage. Actual key replacements filmed at the vehicle with the tools visible.

A boater at the yacht club outside Oxnard found me on YouTube before he ever needed a locksmith. He watched a Lexus smart key video, saw the full procedure, and saved my number. Months later when his 2012 Lexus LX fob started losing range, he already knew who to call. He told me he liked that he could see exactly what the job looked like before picking up the phone.

I used my VVDI Key Tool to program his replacement. His fob, FCC ID HYQ14AAB, was a 4-button smart key. I tested every button, did three clean starts, and confirmed the range from the dock.

His key cost about 298. Dealer charges 556. My review count isn't just a number. Each review is a real Lexus or other make I worked on in the field. There's no dispatcher, no call center, and no mystery tech. The same person from the YouTube videos is the same person at your car.

Certified Lexus LX Key Experts

Licensed by the state, certified by the industry, and verified by Google. Call with confidence.

Talk To A Pro (805) 790-8162 Text Us

BSIS Licensed

LCO#6792

CA Bureau of Security & Investigative Services

NASTF Certified

National Automotive Service Task Force

Fully Insured

Liability & vehicle damage coverage

Google Guaranteed

Verified & backed by Google

Real Work at Fair Prices

See what affordable looks like

2012 Lexus LX

Smart key | Save vs Dealer

10-15 min

Fast, Fair Service

Available Today

Oxnard

Local Savings

805 Area

Get Pricing (805) 790-8162

Five Stars From Verified Customers

Reviews that back up our credentials

f

frankborja25

Dec 2019

★★★★★

“We had one broken key for our Honda Civic and one working key for our Lexus. Tim came out and cut three remote car keys at a great price. All keys worked perfectly. Professional, courteous, and highly recommended.”

Google Review

K

Kim S.

Jul 2025

★★★★★

“This is the only locksmith anyone should ever call. I am still shocked at how fast he arrived and the price was hundreds less than other quotes I received. Honest, professional, and extremely efficient.”

Google Review

M

Marianne S.

Dec 2022

★★★★★

“I had two Subaru key fobs made and Marco provided excellent service. He stayed persistent through multiple part orders to make sure everything was correct. Very thorough, punctual, and great communication throughout.”

Google Review

EZ Car Keyz technician with satisfied customer

★ 5.0 out of 5 - Based on 1,000+ Google Reviews

Certified Pro (805) 790-8162

Lexus LX Emergency Key Replacement FAQ

Mobile service FAQ

My key broke in the ignition. Can you get it out?▼

Yes. On Lexus models with a traditional ignition cylinder, we can extract the broken piece without damaging the lock. Once it is out, we pull the original key code from your door lock or vehicle records and cut a factory spec blade so you are not reusing a worn key. On push-button Lexus models, the emergency blade can snap in the door lock if forced. We remove the broken piece, decode the lock, and cut a new blade that matches exactly.

What is a smart key?▼

My Lexus says key not detected. What do I do?▼

What is the FCC ID for the 2012 Lexus LX key?▼

Is all-keys-lost more expensive than a regular replacement?▼

Questions? Call (805) 790-8162