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Crenshaw Lock

Transponder Key Programming in Westmont · 24/7 mobile

Transponder Key Programming in Westmont, California

Crenshaw Lock Company provides mobile transponder key programming in Westmont, 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 talk through your car and get started.

  • Mobile to your Westmont 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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If your car won't start with a new key, or you have no working key at all, the problem is usually the transponder chip. Most vehicles built since the late 1990s carry a small chip in the key that talks to the immobilizer. If the car doesn't recognize that chip, the engine won't run, however perfectly the blade is cut. Programming teaches the car to accept the key you hold.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and David Shar leads the work. We are fully mobile, so there is no shop to tow your car to. We come to wherever the vehicle is parked, whether that is a driveway on a Westmont side street, a curb near Western Avenue, or a lot along Imperial Highway.

Many Westmont households depend on one car and one key, and bungalow lots here often mean street parking. A lost or broken key can interrupt work, school runs, and everything else. Having a spare programmed before disaster strikes is usually simpler than replacing every key after one goes missing.

How it works in Westmont

  1. 1

    Call and describe the situation

    Phone (323) 997-8867 any hour. Tell us the make, model, and year, and whether you have a working key, a broken one, or none. That tells us what kind of key and programming approach your car needs.

  2. 2

    We come to your vehicle

    Because we are mobile, we drive to you in Westmont, whether you are at home, at work, or stuck on a commercial strip. We don't ask you to move or tow the car.

  3. 3

    Confirm ownership

    Before we program anything, we ask you to show that the vehicle is yours, such as registration and matching identification. This protects you and every other car owner from theft.

  4. 4

    Cut and prepare the key

    If the key needs cutting, we cut the blade to match your locks. We then check that the chip or key type is compatible with your vehicle's immobilizer system.

  5. 5

    Program to the immobilizer

    We connect to the vehicle and register the new transponder so the car recognizes it. Depending on the vehicle, we may also be able to remove lost keys from the system.

  6. 6

    Test everything

    We test the key in the door, the ignition or start button, and any remote functions we have set up, so you know it works before we leave.

Need transponder key programming in Westmont?

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

Call (323) 997-8867

What affects the price

  • Make, model, and year of the vehicle, since immobilizer systems differ widely between manufacturers.
  • Whether you have a working key to copy from or have lost every key, which changes the programming work required.
  • The type of key: basic chip key, flip key, laser-cut key, or smart proximity key.
  • Whether the blade needs cutting, and whether remote buttons also need pairing.
  • How many keys you want programmed in the same visit.
  • Time of day and your location, since we serve you at any hour on a mobile basis.

Why Westmont chooses us

  • Fully mobile service, so your car never needs a tow to a shop. There is no storefront to visit.
  • Available 24/7, which matters when a key fails late at night or early before work.
  • In business since 1987, with the owner, David Shar, leading the work.
  • Ownership checks before programming, which protects you against car theft.
  • We can combine key work with other locksmith needs, such as rekeying a rental or securing a home, in a single visit.
  • Straightforward explanations of what your car needs, without pressure to buy extras.

Transponder Key Programming across Westmont

Westmont sits in unincorporated Los Angeles County, in ZIP codes 90047 and 90044, and the area runs on its cars. The Western Avenue and Vermont Avenue corridors carry heavy daily traffic, and many residents commute from older bungalow blocks where driveways are narrow and street parking is common. We serve vehicles in the Western Avenue corridor and Vermont Avenue corridor, and nearby Vermont Knolls and West Athens too.

Key trouble can happen anywhere: outside Jesse Owens Community Regional Park on South Western Avenue after a weekend game, near Washington Preparatory High School during the school day, or along the Imperial Highway commercial strip and the Vermont and Manchester corridor after a shift. Wherever you are, we come to the car.

Westmont's mix of older stucco bungalows, duplexes, and small apartment buildings also means many people juggle housing and vehicle security together. If you need a transponder key and also a rekey after tenant turnover, or a stronger lock after a break-in, we can handle both on one call to (323) 997-8867.

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 Westmont locksmith services

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

Transponder Key Programming in Westmont — FAQs

What is a transponder key?
It is a key with a small chip inside the head. The car's immobilizer reads the chip, and the engine will only start if the code matches. A plain cut key without a programmed chip won't start the car.
Can you program a key if I lost all my keys?
In many cases yes. It depends on the make, model, and year. Call (323) 997-8867 with your vehicle details and we will tell you what is possible.
Do you come to me in Westmont?
Yes. We are fully mobile and serve Westmont, including the Western and Vermont corridors, 24/7. There is no shop to visit.
Do I need to prove I own the car?
Yes. We ask for proof of ownership and matching identification before programming a key. It protects owners from theft.
Is it cheaper to make a spare before I lose my only key?
Usually it is simpler, because copying from a working key is easier than starting from none. Price depends on the vehicle and key type, so call (323) 997-8867 for guidance.
Can you also program remote buttons?
For many vehicles we can pair the remote functions along with the chip. Tell us your vehicle when you call so we can confirm.
Can you fix a key that was programmed but still won't start the car?
Often we can diagnose it on-site. The cause may be the wrong chip type, a failed chip, or an immobilizer issue. We will check and explain what we find.
Do you handle other lock work during the same visit?
Yes. We can rekey a duplex unit, replace a deadbolt, or look at security gate locks while we are there.
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