Smart Key Service San Antonio

Smart Key & Proximity Key Locksmith San Antonio

S.A. Locksmith & Security provides professional smart key and proximity key service in San Antonio, Texas and surrounding areas including Alamo Heights, Stone Oak, The Dominion, Helotes, Converse, Schertz, Cibolo, New Braunfels, and Boerne. Push-to-start fob not working? Lost your smart key? We replace, program, and repair smart key systems for all vehicle makes and models. 24/7 mobile service at 30-50% less than dealer pricing. Call (210) 348-3677.

What We Do

Smart keys (proximity keys) use Passive Keyless Entry and Start (PKES) technology — the key stays in your pocket while you unlock the doors by touching the handle and start the engine with a push button. S.A. Locksmith & Security provides comprehensive smart key replacement, programming, emergency blade cutting, and system diagnosis. We work with all smart key systems: Toyota/Lexus Smart Key, Honda/Acura Smart Entry, Nissan Intelligent Key, Hyundai/Kia Smart Key, Ford Intelligent Access, GM Keyless Access, BMW Comfort Access, Mercedes KEYLESS-GO, Audi Advanced Key, and all others. Common issues we solve: dead smart key battery, smart key not detected, push button won’t start, and all-keys-lost smart key replacement.

How It Works

Step 1: Diagnosis — Call (210) 348-3677 — we determine if the issue is the smart key, the vehicle's receiver, or the push-button start module.
Step 2: Smart Key Sourcing — We arrive with compatible OEM or aftermarket smart keys for your vehicle.
Step 3: Programming — We register the new smart key with your vehicle's immobilizer using professional diagnostic tools.
Step 4: Full System Test — We verify passive entry (door handles), push-button start, trunk release, and all smart key functions.

Vehicles We Service

All vehicles with push-to-start/smart key systems: Toyota, Lexus, Honda, Acura, Nissan, Infiniti, Hyundai, Kia, Ford, Lincoln, Chevrolet, GMC, Cadillac, Buick, BMW, Mercedes-Benz, Audi, Volkswagen, Jeep, Dodge, Chrysler, Ram, Subaru, Mazda, Volvo, Jaguar, Land Rover, Porsche, Mini, Mitsubishi, and more.

Why Choose S.A. Locksmith & Security?

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Frequently Asked Questions

How much does smart key replacement cost?

Smart key replacement typically costs $200-$550 depending on the vehicle make and model. Call (210) 348-3677 for an exact quote.

My push button won't start — is it the smart key?

Possibly. Common causes include a dead fob battery, damaged smart key, faulty push-button module, or brake switch issue. We diagnose the exact cause on-site.

Can you replace a smart key if all keys are lost?

Yes. We specialize in all-keys-lost smart key replacement. We register a completely new smart key from scratch.

What is passive keyless entry?

Passive Keyless Entry (PKE) means the car detects the smart key in your pocket — you simply touch the door handle to unlock and press the button to start without physically using the key.

Can I still start my car if the smart key battery dies?

Yes. Most vehicles have an emergency start procedure — hold the dead fob against the push button or use the hidden mechanical key blade. We can show you how.

Request a Locksmith

S.A. Locksmith & Security is a full-service, 24/7 locksmith located in San Antonio serving the greater SA area. No project is too big or too small.

📞 (210) 348-3677

We Accept All Major Credit Cards

S.A. Locksmith & Security — Licensed (LIC# B18010), Insured, BBB A+ Accredited. Serving San Antonio since 2009 with a 90-day warranty on all work. No-damage guarantee. Average response time under 20 minutes. 10% Military & Veteran Discount — show valid military ID at time of service.

Need Smart Key Service in San Antonio?

Contact S.A. Locksmith & Security for professional service. Licensed, insured, and available 24/7.