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2003 Lexus GS
Car Key Replacement After Total Loss in Ventura County

Stranded? | We Come to You Now

Available
2003 Lexus GS Remote Head
Remote Head
2003 Lexus GS Transponder
Transponder

CA BSIS LICENSE LCO#6792
Stolen Key? Covered No Key Required Same-Day Fix
Fast Response15-25
min arrival
1,000+reviews
Watch us make keys from zero113KSubscribers
2003 Lexus GS lost key replacement options from EZ Car Keyz Simi Valley CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • Oxnard, CA
15+
Yrs Exp
2003 Lexus GS lost key replacement options from EZ Car Keyz Simi Valley CA
Key specialists
Emergency Service
Available 7 days a week, 6 AM to 11:30 PM
Fixed pricing
Fixed Pricing
The quote on the phone is what you pay. Period.
Fast mobile service
One-Visit Solution
Key cut and programmed in a single visit
805 Special
10% OFFCODE:EZ-805-2026

🔥 No key, no stress, plus savings 🔥

Lost your only key? Still valid
REDEEM (805) 790-8162

2003 Lexus GS
Key Options

No original key required - full replacement on-site

Turn Key Ignition
Most popular Lexus key typeMost Popular
2003 Lexus GS Remote Head HYQ1512V
FCC IDHYQ1512VPart #89070-33470Buttons3BatteryCR1616Frequency315 MHzRemote StartNo
✓ In Stock · Programmed On-Site
Transponder Key
More affordable Lexus key optionCheaper
2003 Lexus GS Transponder Key TOY48BT4-PT
Key BlankTOY48BT4-PTPart #PE-TOY48BT4
✓ In Stock · Programmed On-Site
2003 Lexus GS replacement key fob with no original from EZ Car Keyz Simi Valley CA
No Spare? No Problem
Key built from scratch at your car
2003 Lexus GS replacement key fob with no original from EZ Car Keyz Simi Valley CA
🔧 PRO TIP
The 2003 GS runs a Texas Instruments 4C glass transponder chip inside that remote head key, not the newer 4D or 8A systems. The immobilizer is the older Tokai Rika setup, and the ECU talks to the transponder through the coil antenna around the ignition cylinder. If the key turns but the engine cranks and dies, that is the immobilizer rejecting the chip signal, not a starter issue. Check that the transponder pellet inside the key housing has not cracked loose before assuming the worst.
Related services: Spare Keys · Transponder Keys

Compare the Cost of a Lexus GS Key

See the price difference before you call

EZ Car Keyz
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
✓ Yes
EZ Car Keyz wins 5 out of 6
Same key, fraction of the dealer price
Get Pricing (805) 790-8162

2003 Lexus GS Remote head key Replacement - Fast, Affordable & Professional

Got a call around 11pm from a guy near the Santa Susana Depot Museum in Simi Valley. His 2003 Lexus GS300 was sitting in the driveway and his only remote head key had finally given up. The plastic housing had been cracked for months and the board inside, the one that drives the three buttons on the HYQ1512V, had gotten moisture in it. Remote functions were dead. Then the key itself stopped being recognized by the immobilizer, which meant the engine would crank but cut right out.

He had already called the Lexus dealer. They told him earliest appointment was four days out and he would need a tow in.

I showed up with a blank remote head key, part number 89070-33470, and my programmer. The 2003 GS uses the older 4C transponder protocol, so registration goes through the key addition procedure with existing key bypass when you have the right diagnostic access. Cut the blade on the van, programmed the transponder to the immobilizer ECU, synced the remote, dropped in a fresh CR1616.

Tested all three buttons. Lock, unlock, trunk. Then started the car twice cold to make sure the immobilizer handshake was clean both times.

He stood there watching his car idle and just said "that's it?" Like he had been bracing for a whole production. It was about 25 minutes start to finish, for a fraction of what the dealer quoted him.

Stranded Without a Lexus GS Key?

Emergency all-keys-lost service available 7 days a week. We bring everything to your location.

Rescue Me (805) 790-8162 Text Us
BSIS Licensed Locksmith - California License LCO#6792
BSIS Licensed
CA Bureau of Security & Investigative Services
NASTF Certified Automotive Locksmith - Vehicle Security Professional
NASTF Certified
National Automotive Service Task Force
Fully Insured Locksmith - Hiscox Liability and Vehicle Damage Coverage
Fully Insured
Liability & vehicle damage coverage
Google Guaranteed Locksmith - Verified and Background Checked
Google Guaranteed
Verified & backed by Google
Also serving: Old Town Simi · East Simi Valley · West Simi Valley

On-Site Lexus GS Key Replacement

Service where you need it

Lost 2003 Lexus GS key replacement by EZ Car Keyz in Simi Valley CA
Remote head key | Programmed Where You Are
2003 Lexus GS | Ventura County
Lost 2003 Lexus GS key replacement by EZ Car Keyz in Simi Valley CA
2003 Lexus GS Remote head key
2003 Lexus GS
Remote head key | Cut at Your Location
Estimated arrival time to Simi Valley
30-35 min
Door-to-Door ETA
Available Today
Service location Simi Valley
Simi Valley
At Your Spot
805 Area
Schedule Now (805) 790-8162

Five Stars From Rescued Lexus Drivers

Reviews from customers we rescued

A
Alan C.
Jan 2025
★★★★★

“My Sprinter van key broke and I was stranded. Marco was very friendly and helped me get three new keys quickly. I will definitely be using them again.”

Google Review
G
Guillermo C.
Dec 2025
★★★★★

“I called EZ Car Keyz to unlock my truck, make a key, and sync a new key fob. They were at my location within minutes and handled everything fast and friendly. Prices were great and the service was excellent.”

Google Review
D
Diya M.
Jan 2025
★★★★★

“Fast, affordable, and a great price. Marco did an amazing job and made a key for our Nissan Kicks quickly and professionally. Everything worked perfectly.”

Google Review
See lost key rescues daily62KFollowers
Customer review after losing 2003 Lexus GS key - EZ Car Keyz Simi Valley CA
“Panic to relief in under an hour.”
Customer review after losing 2003 Lexus GS key - EZ Car Keyz Simi Valley CA
5.0 out of 5 - Based on 1,000+ Google Reviews
SOS Call (805) 790-8162

Common Lexus GS Pricing Questions

Pricing, process, and what's included

How does a 2003 Lexus GS key replacement with a mobile locksmith compare to going through the dealer?
We come to you, cut the key, program the 4C transponder chip to the immobilizer, sync the remote, and test everything on site. One trip, one price, done. Lexus dealers split this into a parts counter charge for the remote head key, a separate programming labor fee, and sometimes a diagnostic fee on top of that. Add a tow if the car will not start and you are looking at a much bigger day. With us, the quote on the phone is what you pay. No line items, no surprises.
Can a locksmith handle an all-keys-lost situation on the 2003 Lexus GS?
Does the replacement price include cutting, programming, and the key itself?
My 2003 GS key turns and the engine cranks but immediately dies. Is the key bad?
Can I program a new remote head key to my 2003 GS myself?
Questions? Call (805) 790-8162

Lexus GS Key Service Areas

Google Guaranteed in your neighborhood

📍Ventura County & SB
Ventura County service area map
805 LOCAL LOCKSMITH
need a key? 🔑
Santa Barbara
Santa BarbaraETA 30-35 min
Goleta
GoletaETA 30-35 min
Isla Vista
Isla VistaETA 30-35 min
Montecito
MontecitoETA 25-30 min
Carpinteria
CarpinteriaETA 20-25 min
Ojai
OjaiETA 20-25 min
Ventura
VenturaETA 10-15 min
Santa Paula
Santa PaulaETA 20-25 min
Fillmore
FillmoreETA 25-30 min
Oxnard
OxnardETA 10-15 min
Port Hueneme
Port HuenemeETA 10-15 min
Camarillo
CamarilloETA 15-20 min
Moorpark
MoorparkETA 25-30 min
Simi Valley
Simi ValleyETA 30-35 min
Thousand Oaks
Thousand OaksETA 20-25 min
Santa BarbaraGoletaMontecitoCarpinteriaOjaiVenturaSanta PaulaFillmoreOxnardPort HuenemeCamarilloMoorparkSimi ValleyThousand Oaks
Emergency 2003 Lexus GS locksmith service area in Ventura County CA
Emergency 2003 Lexus GS locksmith service area in Ventura County CA
Licensed pros serving all of Ventura County

Licensed and insured across all service areas

Call Experts (805) 790-8162
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Lexus GS car key replacement video
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Stranded Without a Lexus GS Key?

Emergency all-keys-lost service available 7 days a week. We bring everything to your location.

Lost your 2003 Lexus GS key? Call EZ Car Keyz Simi Valley CA now
Need a key?
Available 6AM - 11:30PM | 7 Days a Week
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Ventura County