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Crenshaw Lock

Transponder Key Programming in Simi Valley · 24/7 mobile

Transponder Key Programming in Simi Valley, California

Crenshaw Lock Company provides mobile transponder key programming in Simi Valley, California, 24/7. We come to your vehicle and program chip keys to its immobilizer, whether you lost every key or just need a spare. Call (323) 997-8867 to describe your car and get started.

  • Mobile to your Simi Valley 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 modern car key is two things in one: a metal blade that turns the ignition and a small chip that talks to the vehicle's immobilizer. If the chip's code is not recognized, the engine may crank without starting, or not crank at all. That is why a key cut at a hardware counter often fails to start the car. Transponder key programming is the step that teaches your vehicle to accept a new key.

In Simi Valley, where daily life runs on a car, this comes up constantly. Commuters head out on the SR-118 and SR-23, parents shuttle between Madera Rd and Tapo Canyon Rd, and families drive to Rancho Simi Community Park or Corriganville Park for the weekend. Losing the only key, or having a worn one finally stop working, can stall the whole day. We are fully mobile, so we bring the equipment to the car instead of asking you to tow it.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar has watched vehicle security change from simple cut keys to coded chips and push-button systems. We are honest about what can be done for your specific vehicle, and we will tell you plainly if something falls outside what we can do on site.

How it works in Simi Valley

  1. 1

    Call and describe the situation

    Phone (323) 997-8867 any hour. Tell us the make, model and year, where the car is parked, and whether you have a working key, one key, or none. That tells us what equipment and key type to prepare.

  2. 2

    We drive to your vehicle

    We are mobile only, with no storefront to visit. We meet you at your home, workplace, a shopping center lot, or wherever the car is sitting, so there is no tow needed in most situations.

  3. 3

    Verify ownership

    Before we create a key for any vehicle, we ask for proof that it is yours, such as registration and a matching ID. This protects you and everyone else from vehicle theft.

  4. 4

    Cut or prepare the key

    If you need a new key, we match the correct blade and chip type for your vehicle. If you already have a key blank or a remote head, we check that it is compatible before programming.

  5. 5

    Program to the immobilizer

    We connect to the vehicle and register the new key so the immobilizer recognizes it. Where the vehicle allows, we can also add spares or remove lost keys from the system so a missing key no longer starts the car.

  6. 6

    Test everything

    We start the engine, test the lock and unlock functions, and confirm each key works before we leave. You should never be left wondering whether the spare will actually start the car.

Need transponder key programming in Simi Valley?

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 systems are much more involved to program than others.
  • Whether you still have a working key to copy or all keys are lost, which changes the procedure required.
  • The type of key: basic chip key, remote-head key, flip key, or push-button smart key.
  • Number of keys needed, including whether you want a spare added at the same visit.
  • Time of day and location, since we serve 24/7 and travel to you across Simi Valley and the surrounding area.
  • Whether the car needs additional work such as ignition or lock repair along with the programming.

Why Simi Valley chooses us

  • Fully mobile service: the work happens beside your vehicle, which saves the cost and hassle of a tow.
  • Available 24/7, so a lost key at night or on a weekend is not left waiting for business hours.
  • In business since 1987, with owner David Shar personally leading the work.
  • Clear ownership verification on every job, which is a sign of a legitimate locksmith rather than a risk.
  • We explain what we are doing and what your options are, including adding a spare so you are not stranded twice.
  • One company for cars, homes and businesses, so we can also help if your house key was on the same ring as the lost car key.

Transponder Key Programming across Simi Valley

Simi Valley is a city of garages, driveways and long commutes, and that shapes how key problems show up. In Wood Ranch and Big Sky, newer developments with attached garages and many late-model vehicles, owners often need push-button or chip keys for newer cars and a spare before the only fob disappears. In Bridle Path and Texas Tract, where families have driven the same vehicles for years, worn keys that finally stop being recognized are common. We can come to you in ZIP codes 93063, 93065, 93062 and 93064, and we also serve 93094.

We have helped with stranded situations at all kinds of places: a parking lot at the Simi Valley Town Center after a shopping trip, a trailhead near Santa Susana Pass State Historic Park, or a visit to the Ronald Reagan Presidential Library & Museum that ended with a key that would not start the car. Out of the way spots matter, so tell us the cross streets or lot and we will find you, whether that is along Cochran St, First St, Sycamore Dr or Los Angeles Ave.

In Santa Susana Knolls, winding lanes and older homes can make finding a parked vehicle trickier, so a precise location is helpful. If you also need house locks rekeyed after a lost key ring, we can handle that on the same visit. Call (323) 997-8867 and we will work out the best plan for your vehicle.

Locked out or need a locksmith now?

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

Call (323) 997-8867

Other Simi Valley locksmith services

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

Transponder Key Programming in Simi Valley — FAQs

What is a transponder key?
It is a car key with a small chip inside that sends a coded signal to the vehicle's immobilizer. The car will only start if it recognizes that code, which is why simply cutting a metal blade is often not enough.
Can you program a key if I lost all my keys in Simi Valley?
In many cases yes. We come to the vehicle, verify ownership, and create and program a new key. The details depend on the make and model, so call (323) 997-8867 with your vehicle information.
Do I need to tow my car to you?
Usually not. We are fully mobile and bring the programming equipment to wherever your car is parked, whether that is your driveway in Wood Ranch or a lot near the Town Center.
Will a key from a hardware store or online work?
Sometimes the blade can be cut, but the chip still has to be compatible and programmed to your car. A mismatched or poor-quality chip may not work. Call us before buying one and we can advise.
Can you add a spare while you are there?
Yes, and we recommend it. Adding a spare during the same visit is usually easier than starting over after the last key is lost. Ask when you call (323) 997-8867.
What proof of ownership do you need?
We ask for a matching ID and documentation such as the vehicle registration or title. This is a standard safeguard and helps protect you against vehicle theft.
Can lost keys be removed from the car's system?
On many vehicles, programming can be done so that previously registered keys are erased and no longer start the car. This depends on the vehicle, and we will tell you what is possible for yours.
Do you work nights and weekends?
Yes. We are available 24/7, including holidays. We make no promises about arrival timing, but you can call any time and we will talk through your options.
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