VENTURA COUNTY
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Fast Response Locksmith

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

BSIS Licensed | NASTF Certified

Available
2003 Cadillac Deville Transponder Key
Transponder Key

Not all locksmiths are created equal. EZ Car Keyz is BBB A+ rated, fully licensed and insured, and trusted by thousands of customers across the area. Your vehicle is in good hands.

CA BSIS LICENSE LCO#6792
1,000+ 5-Star Reviews Fully Insured Background Checked
Fast Response15-25
min arrival
1,000+reviews
See why they skip the dealer113KSubscribers
Rapid response 2003 Cadillac Deville key details from EZ Car Keyz Oxnard CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • Oxnard, CA
15+
Yrs Exp
Rapid response 2003 Cadillac Deville key details from EZ Car Keyz Oxnard CA
Key specialists
Google Guaranteed
Passed Google's screening and verification process
Fixed pricing
Fully Insured
Liability coverage and background-checked technicians
Fast mobile service
8+ Years in Business
Over 10,000 keys made across the region
805 Special
10% OFFCODE:EZ-805-2026

🔥 Licensed and insured, plus savings 🔥

Applies to all dealer-quality key services
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2003 Cadillac Deville
Key Options

Dealer-grade key for a fair, honest price

Transponder Key
Most popular Cadillac key typeMost Popular
2003 Cadillac Deville Transponder Key
FCC IDPart #B99 35118-SDA-A01 5907553 BHO02PT HD112 HO03PT S000A-S711K 15821273ButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
Remote
2003 Cadillac Deville Remote KOBLEAR1XT
FCC IDKOBLEAR1XTPart #10443537Buttons4BatteryCR2032Frequency315 MHzRemote StartNo
✓ In Stock · Programmed On-Site
Metal Key
2003 Cadillac Deville Metal Key
FCC IDPart #ButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
Instant 2003 Cadillac Deville key fob options from EZ Car Keyz Oxnard CA
Skip the Dealer Markup
Professional key, honest rate
Instant 2003 Cadillac Deville key fob options from EZ Car Keyz Oxnard CA
🔧 PRO TIP
The 2003 Cadillac DeVille uses a transponder turn key, not a smart key or push-button setup. There is no fob battery to swap, no proximity entry, no remote functions at all. The key has a transponder chip embedded in the head, and the immobilizer reads it on every start. If the chip is not recognized, the car cranks but won't fire, or it starts and dies within a couple seconds. The fix is a new key cut to the vehicle and programmed to the immobilizer using a capable OBD-based programmer. On this generation of GM full-size sedan, an onboard add-a-key relearn sequence does exist for situations where at least one working key is still available, which can reduce the tool dependency significantly. All-keys-lost is a different story and requires proper equipment. Either way, there is no battery to blame and no fob to troubleshoot.
Related services: Ignition Repair · Smart Key

Certified Mobile vs Dealer Service

See why 1,000+ customers trust us over the dealership

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
BSIS licensed with OEM quality guaranteed
Book Service (805) 790-8162

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

I was parked on a street off Gonzales Road in Mar Vista when the call came in. A woman had driven her 2003 DeVille to run errands and when she came out of the last stop, the key turned but the car wouldn't stay running. It would catch for a second and then die. She tried it a few more times. Same result every time.

She wasn't wrong to think it was a fuel or mechanical issue. Most people do. But the pattern, cranks fine, fires briefly, then stalls, pointed straight at a transponder read failure. The chip in her key head was worn down from years on a heavy keyring, and the immobilizer was done trusting it.

I got to her in about twenty minutes. Decoded the key blade from her existing key, cut a new one to match, programmed the transponder to the vehicle on site. The whole job took under forty minutes including drive time on my end.

She had asked earlier in the call whether she should just have it towed to the dealer. I told her she could, but availability on a Monday afternoon was probably going to push her to later in the week, and they'd want the car there before they'd even look at it. She appreciated not having to make that decision.

Save vs the Dealer on Your Cadillac Deville 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: Blackstock · Carriage Square · Channel Islands Harbor · College Estates

Cadillac Deville Rapid Response, Done Right

Rapid response in the field

Quick turnaround 2003 Cadillac Deville car key by EZ Car Keyz in Oxnard CA
Transponder Key | Rapid On-Site Service
2003 Cadillac Deville | Ventura County
Quick turnaround 2003 Cadillac Deville car key by EZ Car Keyz in Oxnard CA
2003 Cadillac Deville Transponder Key
2003 Cadillac Deville
Transponder Key | Pro Grade Service
Estimated arrival time to Oxnard
Proven Timing
Rapid Arrival
Available Today
Service location Oxnard
Oxnard
Insured Service
805 Area
Same-Day Keys (805) 790-8162

Trusted by 1,000+ Cadillac Drivers

Rated 5.0 on Google and Yelp

M
Miston
Dec 2025
★★★★★

“My ignition would not turn in La Jolla and I thought I needed a tow. EZ Car Keyz repaired the ignition on the spot and also made a spare key for safety. The technician worked carefully and confidently.”

Google Review
R
Rick R.
Apr 2021
★★★★★

“Niv showed up, did his thing, and just like that I had two new keys for a fraction of what the dealership quoted. I have zero reservations recommending him to anyone who needs car keys replaced.”

Google Review
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
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Quick response locksmith review for 2003 Cadillac Deville key - EZ Car Keyz Oxnard CA
“Real savings, real reviews.”
Quick response locksmith review for 2003 Cadillac Deville key - EZ Car Keyz Oxnard CA
5.0 out of 5 - Based on Over 1,000 five-star Google reviews
Best Price (805) 790-8162

Cadillac Deville Mobile Service FAQ

Real costs, no dealer surprises

Do you use OEM or aftermarket keys on the 2003 DeVille?
We use quality blanks that are confirmed compatible for this vehicle, with a transponder chip that matches what the immobilizer expects. On a 2003 DeVille, the chip type matters. If the blank is wrong or a cheap aftermarket chip reads inconsistently, the car may start once and then throw a security fault the next time. We verify the correct blank and chip pairing before we ever head out to your location in Mar Vista or anywhere else in Oxnard. The key is also cut precisely, because a blade that's even slightly off will wear the ignition cylinder faster over time.
How long will the replacement key last?
What if the new key stops working after a few weeks?
My 2003 DeVille starts fine sometimes but randomly won't start other times. Could this be a key issue?
I have a spare key for my 2003 DeVille but I never had it programmed. Will it start the car?
Questions? Call (805) 790-8162

Cadillac Deville Key Service Areas

Certified service across the region

📍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
Rapid dispatch 2003 Cadillac Deville locksmith area in Ventura County CA
Rapid dispatch 2003 Cadillac Deville locksmith area in Ventura County CA
Stranded in Ventura County? We respond fast

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Cadillac Deville car key replacement video
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Professional 2003 Cadillac Deville Key Replacement

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2003 Cadillac Deville car key done in minutes by EZ Car Keyz Oxnard CA
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