Transponder Key Service San Antonio

Transponder Key Locksmith San Antonio

S.A. Locksmith & Security provides professional transponder key cutting and programming in San Antonio, Texas and surrounding areas including Alamo Heights, Stone Oak, The Dominion, Helotes, Converse, Schertz, Cibolo, New Braunfels, and Boerne. Need a new transponder key? Lost all your chip keys? We cut and program transponder keys for all vehicle makes and models — 4C, 4D, 46, 48, ID49, Megamos, Philips, and Texas Instruments chips. 24/7 mobile service at 30-50% less than dealer cost. Call (210) 348-3677.

Licensed (LIC# B18010), insured, and BBB A+ rated, S.A. Locksmith & Security has been serving San Antonio since 2009. We back all work with a 90-day warranty on parts and labor plus manufacturer warranty on all hardware. Our no-damage guarantee means your vehicle is always safe in our hands. With response times under 20 minutes throughout San Antonio, we’re your fastest alternative to the dealership — at a fraction of the cost.

What We Do

Transponder keys contain a small electronic chip that communicates with your vehicle’s immobilizer system. Without a properly programmed transponder chip, the engine will not start — even if the key turns in the ignition. S.A. Locksmith & Security provides complete transponder key cutting, programming, cloning, and replacement. We program all chip types: Texas Instruments 4C and 4D (40-bit and 80-bit), Philips 46 and 48 (Crypto), ID49 (Hitag Pro), Megamos 13/48/AES, and manufacturer-specific encrypted chips. We handle Ford PATS, GM PK3+, Toyota G/H, Honda, Nissan, BMW CAS/FEM, Mercedes EIS/EZS, Audi VAG IMMO, and all other systems.

How It Works

Step 1: Contact Us — Call (210) 348-3677 with your vehicle year, make, and model. We quote transponder key service instantly.
Step 2: Mobile Service — Our locksmith arrives with key blanks, cutting machines, and transponder programming tools.
Step 3: Cut & Program — We cut the key blade to your vehicle's lock and program the transponder chip to the immobilizer.
Step 4: Start Test — We verify the new transponder key starts the engine, the immobilizer accepts it, and all functions work.

Vehicles We Service

All vehicles with transponder immobilizer systems (1995+) — Ford, Chevrolet, GMC, Toyota, Honda, Nissan, Hyundai, Kia, BMW, Mercedes-Benz, Audi, Volkswagen, Lexus, Subaru, Mazda, Jeep, Dodge, Chrysler, Ram, Cadillac, Buick, Lincoln, Jaguar, Land Rover, Porsche, Volvo, Mitsubishi, Infiniti, Acura, and more.

Why Choose S.A. Locksmith & Security?

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Frequently Asked Questions

What is a transponder key?

A transponder key contains a small electronic chip that communicates with your car’s immobilizer. Without the correct chip signal, the engine will not start.

How much does a transponder key cost?

Transponder keys typically cost $120-$280 depending on the chip type and vehicle. Call (210) 348-3677 for your quote.

Can you program a transponder key without the dealer?

Yes. We have professional programming tools (Autel, Xhorse VVDI, SmartPro, AutoProPAD) to program all transponder types.

Can you clone a transponder key?

Yes. We can clone most transponder chips to create a working duplicate from an existing key.

Do all cars have transponder keys?

Most vehicles manufactured after 1998 use transponder keys. Some economy models used non-chip keys into the mid-2000s.

Note: Pricing and availability may vary. Smart key programming requires professional equipment. Some services may require vehicle VIN verification. All work is backed by our 90-day warranty on parts and labor and manufacturer warranty on hardware. S.A. Locksmith & Security — Licensed (LIC# B18010), Insured, BBB Accredited (A+ Rating). 11401 West Ave, San Antonio, TX 78213. All brand names, logos, and trademarks are the property of their respective owners. S.A. Locksmith & Security is an independent locksmith service provider and is not affiliated with any automobile manufacturer or dealership. 10% Military & Veteran Discount — show valid military ID at time of service.

Need Transponder Key Service in San Antonio?

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

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

Disclaimer: S.A. Locksmith & Security is an independent locksmith service provider. Brand names and trademarks are the property of their respective owners. Pricing varies based on service complexity, time of day, and parts required. Call (210) 348-3677 for a detailed quote. Licensed & insured — TX DPS License #B18010.

Need Professional Locksmith Service?

S.A. Locksmith & Security provides fast, reliable locksmith services across San Antonio and surrounding areas. Available 24/7 for emergencies.