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2003 Honda Civic
Key Replacement - Save vs Dealer in Ventura County

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Available
2003 Honda Civic Transponder Key
Transponder Key

Licensed by the California BSIS, NASTF certified, Google Guaranteed, and backed by over 1,000 five-star reviews. When you call EZ Car Keyz, you're getting a verified professional.

CA BSIS LICENSE LCO#6792
CA State Licensed Verified Creds Fully Insured
Fast Response15-25
min arrival
1,000+reviews
See why they skip the dealer113KSubscribers
Fast 2003 Honda Civic key replacement quote from EZ Car Keyz Thousand Oaks CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • Oxnard, CA
15+
Yrs Exp
Fast 2003 Honda Civic key replacement quote from EZ Car Keyz Thousand Oaks 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

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Covers all NASTF-certified key work
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2003 Honda Civic
Key Options

Dealer-grade key for a fair, honest price

Transponder Key
Most popular Honda key typeMost Popular
2003 Honda Civic Transponder Key
FCC IDPart #ButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
Remote
2003 Honda Civic Remote NHVWB1U523
FCC IDNHVWB1U523Part #72147-S5A-A01Buttons4BatteryCR2025Frequency433 MHzRemote StartNo
✓ In Stock · Programmed On-Site
Remote
2003 Honda Civic Remote NHVWB1U523
FCC IDNHVWB1U523Part #08E61-S5D-1M001Buttons3BatteryCR2025Frequency433 MHzRemote StartNo
✓ In Stock · Programmed On-Site
MECHANICAL-KEY
2003 Honda Civic MECHANICAL-KEY
FCC IDPart #ButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
Same-day 2003 Honda Civic key fob replacement from EZ Car Keyz Thousand Oaks CA
Skip the Dealer Markup
Professional key, honest rate
Same-day 2003 Honda Civic key fob replacement from EZ Car Keyz Thousand Oaks CA
🔧 PRO TIP
The 2003 Civic is seventh generation and runs Honda's older immobilizer system, sometimes called Immobilizer I or the early HISS (Honda Ignition Security System). The transponder is a T5 glass chip (Megamos ID13 crypto), and the key blank is HD103 or the equivalent Ilco HD106. No remote buttons on most trims, just a plain transponder key. If your Civic cranks but won't fire and the green immobilizer light on the dash blinks instead of going solid, the ECU is not seeing the chip. Dead key, wrong clone, or a weak solder joint on the immobilizer unit inside the steering column.
Related services: Ignition Repair · Smart Key

Who Do You Trust With Your Key?

Verified reviews, verified licenses - compare

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
Licensed, insured, and 1000+ five-star reviews
Book Service (805) 790-8162

2003 Honda Civic Transponder Key Replacement - Fast, Affordable & Professional

Got a call around 3 PM from a line cook standing in a kitchen parking lot near the Casa Conejo neighborhood in Thousand Oaks. His 2003 Honda Civic wouldn't start and his shift was at 4. You could hear his head chef calling in the background, already asking where he was. I told him I was about 20 minutes out.

Pulled up and used my HON66 Lishi to get the door open. Key was in his hand but the immobilizer light on the instrument cluster was blinking steady, which on these seventh-gen Civics means the ECU is rejecting the transponder signal. Plugged into the OBD-II port, read the immobilizer status, and found the T5 chip had dropped out of registration.

Cut a fresh HD103 blank, cloned the T5 chip, registered it through the diagnostic port, and the green key light went solid on the first crank. Whole thing, picking the door, cutting, programming, took maybe 20 minutes hands-on. I cut him a spare too so he could keep one in his wallet or glovebox and never end up stuck like this again.

He clocked in at 4:10. The dealer route would have meant a tow, a wait measured in days not minutes, and a missed shift he flat out could not afford. He texted me that night just to say thanks. That is the kind of call where timing actually matters and I can get there fast enough to change how someone's day ends.

Save vs the Dealer on Your Honda Civic Key

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

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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
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Also serving: Botanic Garden · Casa Conejo · Conejo Oaks · Dos Vientos

Honda Civic Rapid Response, Done Right

Rapid response in the field

Same-day 2003 Honda Civic key replacement in Thousand Oaks CA
Transponder Key | Rapid On-Site Service
2003 Honda Civic | Ventura County
Same-day 2003 Honda Civic key replacement in Thousand Oaks CA
2003 Honda Civic Transponder Key
2003 Honda Civic
Transponder Key | Pro Grade Service
Estimated arrival time to Thousand Oaks
Proven Timing
Rapid Arrival
Available Today
Service location Thousand Oaks
Thousand Oaks
Insured Service
805 Area
Same-Day Keys (805) 790-8162

Licensed, Certified, and Reviewed

Trusted and verified by real customers

S
Sonia V.
Feb 2024
★★★★★

“Marco came out quickly, cut and programmed a new BMW key fob fast, and was extremely polite and professional.”

Yelp Review
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
Gordon H.
Dec 2020
★★★★★

“My son had an issue opening the driver door on his Honda Civic. I called on New Year's Day and expected a nightmare, but they arrived quickly and fixed the problem in about half an hour.”

Google Review
Watch real savings, real jobs62KFollowers
Fast 2003 Honda Civic key replacement review - EZ Car Keyz Thousand Oaks CA
“Real savings, real reviews.”
Fast 2003 Honda Civic key replacement review - EZ Car Keyz Thousand Oaks CA
5.0 out of 5 - Based on Over 1,000 five-star Google reviews
Best Price (805) 790-8162

Honda Civic Mobile Service FAQ

Real costs, no dealer surprises

Are you licensed and insured to work on Honda vehicles in California?
Yes. EZ Car Keyz is licensed through the California Bureau of Security and Investigative Services (BSIS), which is the state agency that regulates locksmiths. We carry full liability insurance and hold NASTF Vehicle Security Professional certification, meaning we have passed federal background checks and credentialing required to access Honda key code and immobilizer data directly. You can verify our BSIS license number anytime before we show up. If a locksmith cannot produce one, that is your sign to call someone else.
How do I tell if a locksmith is legit before they show up?
Will the replacement transponder key work exactly like my original Honda key?
My green key light blinks and the engine cranks but will not start. What is happening?
I lost all my keys. Can you still make one without going to the dealer?
Questions? Call (805) 790-8162

Honda Civic Key Service Areas

Background checked and bonded everywhere

📍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
Same-day 2003 Honda Civic locksmith service area in Ventura County CA
Same-day 2003 Honda Civic locksmith service area in Ventura County CA
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