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2003 Toyota Sienna
Key Replacement - Save vs Dealer in San Diego

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Available
2003 Toyota Sienna 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
CA State Licensed Verified Creds Fully Insured
Fast Response15-25
min arrival
100+reviews
See why they skip the dealer113KSubscribers
2003 Toyota Sienna key replacement info - no tow needed - EZ Car Keyz Rancho Santa Fe CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • San Diego, CA
15+
Yrs Exp
2003 Toyota Sienna key replacement info - no tow needed - EZ Car Keyz Rancho Santa Fe 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
619 Special
10% OFFCODE:EZ-619-2026

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Covers all NASTF-certified key work
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2003 Toyota Sienna
Key Options

Dealer-grade key for a fair, honest price

Transponder Key
Most popular Toyota key typeMost Popular
2003 Toyota Sienna Transponder Key
FCC IDPart #PE-TOY43AT4ButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
Remote
2003 Toyota Sienna Remote GQ43VT14T
FCC IDGQ43VT14TPart #89742-06010Buttons3BatteryCR2032Frequency315 MHzRemote StartNo
✓ In Stock · Programmed On-Site
Metal Key
2003 Toyota Sienna Metal Key
FCC IDPart #ButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
2003 Toyota Sienna key fob cut and delivered to you in Rancho Santa Fe CA
Skip the Dealer Markup
Professional key, honest rate
2003 Toyota Sienna key fob cut and delivered to you in Rancho Santa Fe CA
🔧 PRO TIP
2003 Sienna uses a transponder key, not a smart key. No fob battery, no proximity entry, no backup coil trick against a start button. The chip inside the key head communicates with the immobilizer antenna ring around the ignition cylinder every single time you turn it. If that ring gets damaged or the connection to the body control module goes flaky, a perfectly good key will crank the engine and then kill it within two seconds. Owners always blame the key first. Half the time the key is fine and the antenna ring is the actual problem. Worth knowing before you buy a replacement you might not need.
Related services: Ignition Repair · Smart Key

Who Do You Trust With Your Key?

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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 (619) 876-1271

2003 Toyota Sienna Transponder Key Replacement - Fast, Affordable & Professional

The Crosby is the kind of place where people are busy in a very specific way. Schedules are tight, the garage is gated, and nobody has half a day to sit at a dealership.

A physician working out of an office building there called me on a Tuesday morning. The plastic head on her 2003 Sienna key had cracked through, the blade was barely holding on, and she had back-to-back patients until late afternoon. The dealer told her to bring the vehicle in. She laughed and hung up.

I got there during her lunch break. The original key was cracked badly enough that I could not use it to decode directly, so I decoded the lock cylinder mechanically at the car and cut a replacement blade to match. Then I connected to the OBD port and enrolled the new transponder chip into the immobilizer. The whole thing ran about 35 minutes in her building's garage.

She tested it herself before she walked back inside. Turned the key, engine started, stayed running. That second part matters on these, because a mis-programmed chip will start the car and shut it down almost immediately. Staying running is the confirmation.

Her car never moved. She never missed a patient. The dealer would have needed a tow, an appointment, and most of a workday to accomplish the same thing.

Save vs the Dealer on Your Toyota Sienna 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
Google Guaranteed
Verified & backed by Google
Also serving: Fairbanks Ranch · Rancho Santa Fe Village · The Bridges · The Crosby

Toyota Sienna Rapid Response, Done Right

Rapid response in the field

2003 Toyota Sienna key replaced in your driveway in Rancho Santa Fe CA
Transponder Key | Rapid On-Site Service
2003 Toyota Sienna | San Diego
2003 Toyota Sienna key replaced in your driveway in Rancho Santa Fe CA
2003 Toyota Sienna Transponder Key
2003 Toyota Sienna
Transponder Key | Pro Grade Service
Estimated arrival time to Rancho Santa Fe
Proven Timing
Rapid Arrival
Available Today
Service location Rancho Santa Fe
Rancho Santa Fe
Insured Service
619 Area
Same-Day Keys (619) 876-1271

Licensed, Certified, and Reviewed

Trusted and verified by real customers

K
Kane G.
Apr 2024
★★★★★

“Tim is a hero. He programmed a master proximity key for a newer Volkswagen that multiple locksmiths refused to touch. He spent hours until late at night making sure every function worked perfectly. The skill level here is incredible.”

Yelp Review
N
Natasha S.
Sep 2025
★★★★★

“Very professional and extremely affordable. The price was literally about three times cheaper than what my dealership quoted me. Fast service and no stress at all. Highly recommend.”

Google Review
A
A. G.
Jun 2025
★★★★★

“A friend lost my Lexus key and he was able to program and cut a brand new one within 20 minutes. Arrived within about 40 minutes and was friendly, efficient, and quick.”

Google Review
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Locksmith came to me for 2003 Toyota Sienna key - EZ Car Keyz Rancho Santa Fe CA review
“Real savings, real reviews.”
Locksmith came to me for 2003 Toyota Sienna key - EZ Car Keyz Rancho Santa Fe CA review
5.0 out of 5 - Based on Over 100 five-star Google reviews
Best Price (619) 876-1271

Toyota Sienna Mobile Service FAQ

Real costs, no dealer surprises

How long does a 2003 Toyota Sienna key replacement take?
On-site, plan for 30 to 45 minutes. Decoding the lock or reading the key, cutting the blade, and programming the transponder through the OBD port all happen at your vehicle. The programming step on this generation is not instant, there is a handshake sequence between the tool and the immobilizer that takes a few minutes to complete. Once it finishes, I do a live test: key in, engine starts, engine stays running. That last part is the real confirmation the chip enrolled correctly. At a dealer you are looking at scheduling days out, arranging transport, and sitting in a waiting room even after you arrive on time.
How fast can you get to my location in Rancho Santa Fe?
Can I get a replacement key made today?
My 2003 Sienna cranks but shuts off immediately after starting. Could this be a key or immobilizer problem?
I bought a replacement key online for my 2003 Sienna. Can I program it myself?
Questions? Call (619) 876-1271

Toyota Sienna Key Service Areas

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📍San Diego County
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San DiegoChula VistaOceansideEscondidoCarlsbadEl CajonVistaSan MarcosEncinitasNational CityLa MesaSanteePowayCoronado
Doorstep 2003 Toyota Sienna locksmith coverage across Rancho Santa Fe County CA
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