VENTURA COUNTY
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Fast Response Locksmith

2003 Infiniti QX4
Key Replacement - Save vs Dealer in Ventura County

All Keys Lost? | No Problem

Available
2003 Infiniti QX4 Transponder Key
Transponder Key

Lost all your keys? Don't panic, and don't call a tow truck. Our mobile locksmith comes to your vehicle and creates a brand new key from scratch, even with zero working keys.

CA BSIS LICENSE LCO#6792
All Keys Lost? Easy No Tow Required New Key On-Site
Fast Response15-25
min arrival
1,000+reviews
See why they skip the dealer113KSubscribers
Professional 2003 Infiniti QX4 locksmith quote from EZ Car Keyz Santa Barbara CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • Oxnard, CA
15+
Yrs Exp
Professional 2003 Infiniti QX4 locksmith quote from EZ Car Keyz Santa Barbara CA
Key specialists
All Keys Lost?
We make new keys from scratch - no existing key needed
Fixed pricing
No Tow Required
We come to wherever the car is sitting
Fast mobile service
Emergency Service
Available 7 days a week, 6 AM to 11:30 PM
805 Special
10% OFFCODE:EZ-805-2026

🔥 Lost your key? Save 10% today 🔥

Covers emergency & lost key services
REDEEM (805) 790-8162

2003 Infiniti QX4
Key Options

Dealer-grade key for a fair, honest price

Transponder Key
Most popular Infiniti key typeMost Popular
2003 Infiniti QX4 Transponder Key
FCC IDPart #K-NI02TButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
Metal Key
2003 Infiniti QX4 Metal Key
FCC IDPart #ButtonsBatteryFrequencyRemote StartNo
✓ In Stock · Programmed On-Site
Professional 2003 Infiniti QX4 key programming by EZ Car Keyz Santa Barbara CA
Skip the Dealer Markup
Professional key, honest rate
Professional 2003 Infiniti QX4 key programming by EZ Car Keyz Santa Barbara CA
🔧 PRO TIP
The 2003 QX4 uses a transponder turn-key, not a smart key or push-button setup. It turns in the ignition cylinder and the transponder chip inside the head talks to the immobilizer antenna ring around the ignition. No fob, no remote, no battery to swap. The key itself is the whole job. If someone tries to cut a replacement without programming the chip to the vehicle, the engine will crank but not start, or it won't crank at all depending on how far the system gets before it kills the signal. You need both a correctly cut blade and a properly enrolled chip, done together, on site.
Related services: Ignition Repair · Smart Key

All Infiniti QX4 Keys Lost? Compare Options

Lost all your keys? Compare your options

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
Lost all your keys? No tow truck needed
Book Service (805) 790-8162

2003 Infiniti QX4 Transponder Key Replacement - Fast, Affordable & Professional

Over in the Samarkand neighborhood of Santa Barbara, I met a grad student at his cousin's place on a Saturday afternoon. He had already been through it once. A different locksmith had come out, tried to enroll a new transponder key to the QX4, got partway through the process, bailed, and left the immobilizer in a confused state. Charged him for the attempt and told him to go to the dealer to sort out the mess.

When he called me he was upfront about it. He said he was nervous about throwing more money at this and getting nowhere again.

I plugged into the OBD port and looked at what was actually going on. The fault history told the story clearly. The previous attempt had used a procedure that did not match this vehicle, and the immobilizer had locked up mid-sequence. I cleared the fault history, confirmed the system was back to a clean baseline, and then ran the correct enrollment sequence for the QX4 from scratch. The new transponder key I had cut went in, the antenna ring did its job, and the engine started without complaint.

He watched the whole thing from the driveway. When it started he just nodded slowly, like he was waiting for it to change its mind.

The dealer had quoted him a number to fix what the first locksmith broke. I handled the cleanup and the full enrollment as one job, because that is what doing it right actually means. He saved a good chunk compared to what the dealer wanted, and he did not have to tow it anywhere.

Save vs the Dealer on Your Infiniti QX4 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: Downtown Santa Barbara · Eastside · Funk Zone · Hope Ranch

Infiniti QX4 Rapid Response, Done Right

Rapid response in the field

Certified auto locksmith servicing 2003 Infiniti QX4 in Santa Barbara CA
Transponder Key | Rapid On-Site Service
2003 Infiniti QX4 | Ventura County
Certified auto locksmith servicing 2003 Infiniti QX4 in Santa Barbara CA
2003 Infiniti QX4 Transponder Key
2003 Infiniti QX4
Transponder Key | Rescue Key
Estimated arrival time to Santa Barbara
Priority ETA
Rapid Arrival
Available Today
Service location Santa Barbara
Santa Barbara
Help Is Close
805 Area
Same-Day Keys (805) 790-8162

Infiniti Owners Rescued and Reviewed

From lost keys to happy customers

E
Ezra M.
Oct 2025
★★★★★

“I needed a new key for my car and Marco gave me the best quote by far. He showed up, made the new key on the spot, and everything works perfectly. Fast service and great value.”

Google Review
F
Felipe P.
Oct 2025
★★★★★

“Quick, affordable, and professional service. Marco made a new key for my motorcycle after I lost it and had me back on the road fast. Clean work, great price, and super friendly.”

Google Review
A
Alexx C.
Dec 2025
★★★★★

“I needed a car key replacement in Hillcrest and EZ Car Keyz helped me immediately. The technician programmed a new smart key right next to my car and tested every function before leaving. Fast, friendly, and very professional.”

Google Review
Watch real savings, real jobs62KFollowers
Certified locksmith review for 2003 Infiniti QX4 service by EZ Car Keyz Santa Barbara CA
“Real savings, real reviews.”
Certified locksmith review for 2003 Infiniti QX4 service by EZ Car Keyz Santa Barbara CA
5.0 out of 5 - Based on Over 1,000 five-star Google reviews
Best Price (805) 790-8162

Infiniti QX4 Mobile Service FAQ

Real costs, no dealer surprises

My key shell is cracked and worn. Can you replace the shell without having to reprogram the chip?
On a 2003 QX4 transponder key, the programmable chip sits inside the key head. If the shell is cracking or the plastic is worn through, the fix is to carefully transfer the original chip into a new key head and cut the blade to match. As long as the chip itself is undamaged and moves over intact, the programming stays with it and no re-enrollment is needed. Where it gets tricky is if the chip has been cracked, soaked, or the original key has been lost entirely. Then you are looking at a full cut-and-program job. But a simple shell transfer on an otherwise working key is a clean, fast fix.
What exactly is a transponder key and why does the 2003 QX4 need one?
The QX4 is showing a key warning and will not start. Where do I begin?
I bought a replacement key blank online. Can I just have it cut, or does it also need to be programmed?
Can the 2003 QX4 be programmed with a new key if both originals are lost?
Questions? Call (805) 790-8162

Infiniti QX4 Key Service Areas

Emergency coverage 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
Certified 2003 Infiniti QX4 locksmith coverage in Ventura County CA
Certified 2003 Infiniti QX4 locksmith coverage in Ventura County CA
Stranded in Ventura County? We respond fast

Emergency service available in all listed cities

SOS Call (805) 790-8162
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Infiniti QX4 car key replacement video
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Lost Your 2003 Infiniti QX4 Key? We Can Help

Lost all your keys? We make new ones on-site. No tow truck needed. Emergency service.

Guaranteed 2003 Infiniti QX4 key service by EZ Car Keyz Santa Barbara CA
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Ventura County