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Crenshaw Lock

Transponder Key Programming in Sylmar · 24/7 mobile

Transponder Key Programming in Sylmar, California

Crenshaw Lock Company provides mobile transponder key programming in Sylmar, California, 24 hours a day, 7 days a week. We come to your vehicle and program chip keys to its immobilizer, so you never have to tow it anywhere. Call (323) 997-8867 any time.

  • Mobile to your Sylmar location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
Car key being programmed with a handheld programmer inside a car
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A transponder key looks like an ordinary key, but inside the plastic head is a small chip that talks to your car's immobilizer. If the chip's code isn't recognized, the engine may turn over briefly or not at all, even when the metal blade turns the ignition freely. That is why a hardware-store copy often opens the door but won't start the car. Programming is the step that teaches the vehicle to accept a new key.

In a community as spread out as Sylmar, getting stranded is a real inconvenience. Some drivers commute down Foothill Boulevard, some run errands along Hubbard Street, and plenty rely on the I-5, I-210 and SR-14 to get across the Valley. Towing a car to a dealer just to get a key made can cost you a whole day. Crenshaw Lock Company is fully mobile, so the work happens wherever the car is parked: in your driveway, at a hospital lot, or at a trailhead.

We have served Greater Los Angeles and Ventura County since 1987, under owner and lead technician David Shar. We have no storefront, so there is nothing to drive to. You call, we explain what your vehicle needs, and we come to you. This page explains how programming works, what affects the cost, and what Sylmar drivers should know before they call.

How it works in Sylmar

  1. 1

    You call and describe the situation

    Call (323) 997-8867 and tell us the make, model and year of the vehicle, and whether you have any working keys left. The answer changes the approach. Adding a spare to a car that still has a working key is often simpler than creating a first key after every key has been lost.

  2. 2

    We confirm ownership

    Before we cut or program anything, we ask for proof that the vehicle is yours, such as registration and a matching ID. It protects you as much as us, because it keeps a stranger from having a key made to your car.

  3. 3

    We come to the vehicle

    Our technician drives to your location in Sylmar with the equipment needed for the job. Whether the car is in a Rancho Cascades driveway, a lot near Olive View-UCLA Medical Center, or a rural lane near El Cariso, the work is done on site.

  4. 4

    Cutting and preparing the key

    If your vehicle uses a cut blade, we cut it to match the lock by code or by the existing key. We then check that the transponder chip or smart-key shell is compatible with your vehicle before attempting to program it.

  5. 5

    Programming to the immobilizer

    We connect diagnostic equipment to the vehicle and register the new key with its immobilizer system. Depending on the car, this may mean adding a key alongside existing ones or, when all keys are lost, creating new ones from scratch.

  6. 6

    Testing everything

    We test the key in the door, the ignition or start button, and the remote functions if the key has them. We make sure it starts the car and runs it properly before we consider the job finished.

Need transponder key programming in Sylmar?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

What affects the price

  • Vehicle make, model and year, since some manufacturers use more complex immobilizer systems than others.
  • Whether you have a working key already, because adding a spare is a different job than making a key when all are lost.
  • Key type: a basic chip key, a flip key with remote, or a push-button smart key each involve different parts and programming steps.
  • The number of keys you need programmed in the same visit.
  • Whether the blade needs cutting, including high-security laser-cut blades that require specialized machinery.
  • The time of day and your location, since we are available around the clock and travel to you.

Why Sylmar chooses us

  • We are fully mobile. There is no shop to visit and no tow required, so the work is done where your car is.
  • We have been serving Greater Los Angeles and Ventura County since 1987, so we have seen a wide range of vehicles and key problems.
  • The owner, David Shar, leads the work, which keeps accountability clear.
  • We are available 24/7, so a dead key at night or on a weekend is not a problem.
  • We confirm ownership before programming, which protects you from unauthorized keys.
  • We give a clear explanation of your options and what drives the price before we start, with no pressure.

Transponder Key Programming across Sylmar

Sylmar climbs from the valley floor into the San Gabriel foothills, and its vehicles reflect that mix. In the gated streets of Rancho Cascades, residents often keep several cars and a spare key in a drawer that may have been programmed years ago. If you have just bought a home or car there and want a fresh key, we can come right to your driveway in 91342 and handle it without you leaving the property.

Over in El Cariso and the area around the park and golf course, people park for long stretches and a key fob that fails or goes missing can leave you far from home. The same is true near Olive View-UCLA Medical Center and in the foothill district, where staff, visitors and patients' families may be dealing with a lost key at an odd hour. We can reach you at any time of day or night.

Many Sylmar drivers also have trucks and trailers for work or horses, especially on larger lots off Hubbard Street and Foothill Boulevard. Truck keys with chips are just as protected as car keys, and we can program those too. Whether you are close to the Newhall Pass interchange or deep in the hills, call (323) 997-8867 and we will come to you.

Locked out or need a locksmith now?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

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Other Sylmar locksmith services

See all of our Sylmar services, or our citywide transponder key programming page.

Transponder Key Programming in Sylmar — FAQs

What is a transponder key?
It is a key with a small chip in the head that sends a code to your car's immobilizer. The engine will only start if the code is recognized, which is why a plain copy of the metal blade usually will not start the car.
Can you program a key at my home in Sylmar?
Yes. We are fully mobile and come to your driveway, street or parking lot anywhere in Sylmar, including 91342. Call (323) 997-8867 to arrange it.
I lost all my keys. Can you still help?
In many cases, yes. Making a first key when none work is a more involved process than adding a spare, but it can often be done on site. Call (323) 997-8867 and tell us the vehicle details.
Are you available at night or on weekends?
Yes. We operate 24/7, so a key problem at night, on a weekend or on a holiday is no obstacle.
Is it cheaper than going to the dealer?
We will not make a blanket claim, since pricing depends on the vehicle and the situation. A major benefit is that we come to you, so you avoid towing and a trip to a dealer.
Do I need to prove the car is mine?
Yes. We ask for registration and matching identification before programming, which protects you from someone getting a key to your car without permission.
Can you program a spare for a truck or work vehicle?
Often, yes. Many trucks use chip keys as well. Give us the make, model and year when you call so we can confirm what is involved.
Will my old key still work after programming a new one?
It depends on the vehicle and the procedure. Some situations leave existing keys working, while others reset the system. We will explain this before we begin. Questions can go to (323) 997-8867.
DS

Reviewed by David Shar — Owner & Lead Technician

Crenshaw Lock Company has served Greater Los Angeles & Ventura County since 1987.

Last updated 2026-10-12.

Call (323) 997-8867 · Open 24/7