VENTURA COUNTY
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Fast Response Locksmith

2003 Cadillac CTS
Key Replacement - Save vs Dealer in Ventura County

No Towing Required | We Bring the Shop

Available
2003 Cadillac CTS Transponder Key
Transponder Key

Our fully-equipped mobile unit comes directly to your home, office, or wherever you are. No towing, no waiting rooms, no rearranging your day. We handle everything on-site.

CA BSIS LICENSE LCO#6792
Service at Your Door No Appointments On Your Schedule
Fast Response15-25
min arrival
1,000+reviews
See why they skip the dealer113KSubscribers
Certified 2003 Cadillac CTS key replacement info from EZ Car Keyz Ventura CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • Oxnard, CA
15+
Yrs Exp
Certified 2003 Cadillac CTS key replacement info from EZ Car Keyz Ventura CA
Key specialists
Key Specialists
Fully equipped mobile unit - all makes and models
Fixed pricing
At Your Location
Home, office, parking lot - wherever you are
Fast mobile service
No Towing Needed
We handle everything on-site, even all-keys-lost
805 Special
10% OFFCODE:EZ-805-2026

🔥 No dealer trip, plus a discount 🔥

Use at home, office, or roadside
REDEEM (805) 790-8162

2003 Cadillac CTS
Key Options

Dealer-grade key for a fair, honest price

Transponder Key
Most popular Cadillac key typeMost Popular
2003 Cadillac CTS Transponder Key
FCC IDPart #5928825ButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
Remote
2003 Cadillac CTS Remote L2C0005T
FCC IDL2C0005TPart #16263074-99Buttons4BatteryCR2032Frequency315 MHzRemote StartNo
✓ In Stock · Programmed On-Site
OEM quality 2003 Cadillac CTS key fob from EZ Car Keyz Ventura CA
Skip the Dealer Markup
Professional key, honest rate
OEM quality 2003 Cadillac CTS key fob from EZ Car Keyz Ventura CA
🔧 PRO TIP
The 2003 CTS runs GM's PK3+ (Passkey 3+) system with a Megamos ID48 transponder chip in a B112/B107 blade blank (GM part 5928825). All-keys-lost does not need a scan tool. The BCM runs a three-cycle on-board relearn: key on, wait 10 minutes for the SECURITY light to stop flashing, key off, repeat two more times. Thirty minutes of sitting there watching a dash light blink. No shortcut. Same procedure as a same-era Impala or LaCrosse on the Sigma platform.
Related services: Ignition Repair · Smart Key

Your Cadillac CTS Key at Your Location

Your driveway vs their service bay

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
Your driveway beats their waiting room
Book Service (805) 790-8162

2003 Cadillac CTS Transponder Key Replacement - Fast, Affordable & Professional

A guy visiting his daughter for Thanksgiving near Ventura Pier called me about his 2003 Cadillac CTS. He had one working key and wanted a spare, but not a junk drawer backup. He wanted to carry it daily and needed to know if an aftermarket key would hold up the same as factory.

Fair question.

I get it a lot on these first-gen CTS cars because the OEM key with the Cadillac crest on the bow looks premium and people assume the aftermarket version is somehow lesser. The reality is the B112 blade profile is identical, the Megamos ID48 chip inside is the same spec that talks to his BCM, and the plastic housing takes the same daily beating. The only difference you can see is no crest logo on the back.

I cut the key on the hood of his daughter's driveway, got him in the car, and we sat through the PK3+ relearn together. Three ten-minute cycles. He watched the SECURITY telltale on the instrument cluster blink, go solid, blink, go solid. Thirty minutes of small talk about his daughter's new apartment and whether the pier was worth walking.

After the third cycle the car started clean. No hesitation, no crank-no-start, no SECURITY light staying on. He turned it off and started it again just to be sure. Then one more time.

He drove off with a daily-carry spare that works the same as his original, for a fraction of what the dealer quoted him over the phone.

Save vs the Dealer on Your Cadillac CTS Key

Get your key for hundreds less than the dealer. Same quality, same result, better price.

Get Pricing (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: Casitas Springs · College · Downtown Ventura · East Ventura

Cadillac CTS Rapid Response, Done Right

Rapid response in the field

Licensed locksmith replacing 2003 Cadillac CTS key in Ventura CA
Transponder Key | Rapid On-Site Service
2003 Cadillac CTS | Ventura County
Licensed locksmith replacing 2003 Cadillac CTS key in Ventura CA
2003 Cadillac CTS Transponder Key
2003 Cadillac CTS
Transponder Key | Made at Your Door
Estimated arrival time to Ventura
We Come to You
Rapid Arrival
Available Today
Service location Ventura
Ventura
We Come Here
805 Area
Same-Day Keys (805) 790-8162

Cadillac Customers Love the Convenience

What doorstep service looks like in reviews

J
Joseph C.
Apr 2024
★★★★★

“I needed two keys made for my Honda Element. Friendly, fast, fair pricing, and far better than any other locksmith I have used in the area. Best service by far.”

Yelp Review
P
Priscilla L.
May 2025
★★★★★

“I lost my Honda Passport key and called EZ Car Keyz. He came out and made a new key in under five minutes. Legendary service.”

Google Review
D
Dan G.
Mar 2024
★★★★★

“They responded instantly, showed up within an hour, and arrived exactly when they said they would. Made a copy and programmed a fob for my 2014 car with a worn ignition in about 15 minutes. The new key works perfectly and feels like a dealer key.”

Yelp Review
Watch real savings, real jobs62KFollowers
5-star review of 2003 Cadillac CTS key service by EZ Car Keyz Ventura CA
“Real savings, real reviews.”
5-star review of 2003 Cadillac CTS key service by EZ Car Keyz Ventura CA
5.0 out of 5 - Based on Over 1,000 five-star Google reviews
Best Price (805) 790-8162

Cadillac CTS Mobile Service FAQ

Real costs, no dealer surprises

I lost all the keys to my 2003 Cadillac CTS. Can you still make one without towing it?
Yes. All-keys-lost on the 2003 CTS is a standard mobile job. I cut a new B112 blank with the correct Megamos ID48 chip, then run the PK3+ on-board theft deterrent relearn right at the car. Three ten-minute ignition cycles, about 30 minutes of wait time total, plus cutting and verification. No scan tool needed, no tow truck, no dealer appointment. The old missing keys get erased from the BCM automatically during the relearn, so they can no longer start the car.
Do I need to tow my 2003 CTS to the dealer if I have no keys?
How long does an all-keys-lost replacement take on a 2003 CTS?
My 2003 CTS cranks but won't start and the SECURITY light is on. Is it the key or something else?
Can I program a new transponder key to my 2003 CTS myself if I already have a working key?
Questions? Call (805) 790-8162

Cadillac CTS Key Service Areas

Home, work, or roadside in any city

📍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
Licensed 2003 Cadillac CTS locksmith service area in Ventura County CA
Licensed 2003 Cadillac CTS locksmith service area in Ventura County CA
Stranded in Ventura County? We respond fast

We come to your exact location in any of these cities

SOS Call (805) 790-8162
Filmed on Location
Cadillac CTS car key replacement video
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Skip the Dealer, We Drive to You

Your car stays where it is. We drive to you with all the tools and key blanks on board.

Trusted 2003 Cadillac CTS locksmith service by EZ Car Keyz Ventura CA
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