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Crenshaw Lock

Transponder Key Programming in Covina · 24/7 mobile

Transponder Key Programming in Covina, California

Crenshaw Lock Company provides mobile transponder key programming in Covina, California, 24 hours a day, 7 days a week. We come to your vehicle and program chip keys to its immobilizer so it starts and runs. Call (323) 997-8867 to describe your situation.

  • Mobile to your Covina 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
Open now(323) 997-8867

A transponder key looks like an ordinary key, but its plastic head holds a small chip that talks to your car's immobilizer. If the chip's code isn't recognized, the engine may turn over briefly and quit, or it won't crank at all. That is why a key cut at a hardware counter can open the door yet never start the car. Programming is the step that teaches the vehicle to accept the key.

In Covina this comes up in everyday ways. A spare gets lost at a Metrolink commuter lot, the only key goes missing after a day downtown, or a family car needs a second key before a teenager starts driving. Because Crenshaw Lock Company is fully mobile, there is no shop for you to reach. We bring the equipment to your driveway, apartment parking space, or the curb where you are stranded.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner David Shar leads the work. We will tell you honestly what your vehicle needs before we start, including whether a spare is the smarter move while we are already there. We make no promises about timing or cost until we know your make, model, and year.

How it works in Covina

  1. 1

    Call and describe the vehicle

    Call (323) 997-8867 any hour. Tell us the make, model, and year, whether you have any working key, and where the vehicle is parked. This lets us plan the right equipment before heading out.

  2. 2

    Confirm ownership

    Before we cut or program a key, we ask for proof that the vehicle is yours, such as registration or ID matching the vehicle. This protects you and is standard practice for responsible locksmiths.

  3. 3

    Cut or prepare the key

    If you need a new key, we cut it to match your vehicle's lock. If you already have a blank or a key that needs reprogramming, we check that the chip type is compatible with your vehicle.

  4. 4

    Program to the immobilizer

    We connect programming equipment to the vehicle and register the new key with the immobilizer. The method depends on the vehicle, and some allow on-site programming even when every key is lost.

  5. 5

    Test everything

    We test the key in the door, the ignition, and any remote functions that apply. You see it start the car before we finish, and we discuss whether a second spare is worth having.

Need transponder key programming in Covina?

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, since some manufacturers use more complex immobilizer systems than others.
  • Whether you still have a working key or all keys are lost, which changes the programming method.
  • The type of key: a basic chip key, a flip key, a remote head key, or a push-button smart key.
  • Whether the key must also be cut, and whether it is a standard edge-cut or a laser-cut key.
  • How many keys you want programmed in one visit, since a spare is often easier to add now than later.
  • Time of day and the vehicle's location, because we serve 24/7 and travel to you.

Why Covina chooses us

  • Fully mobile service: we program the key at your vehicle, so you do not need to tow a car you cannot start.
  • In business since 1987, with owner David Shar leading the work.
  • Available 24/7, including nights and weekends when a lost key tends to happen.
  • Honest assessments up front, including when a spare or a simple reprogram is all you need.
  • Ownership verification on every job, so keys are made only for the rightful owner.
  • Familiarity with Covina and the surrounding San Gabriel Valley, from downtown streets to hillside driveways.

Transponder Key Programming across Covina

Covina spreads across ZIP codes 91722, 91723, and 91724, and our mobile service covers all of them. In historic Downtown Covina, around Citrus Ave and Heritage Plaza, cars are often parked on the street while owners eat, shop, or catch a show at the Covina Center for the Performing Arts. A lost key there is a stressful problem, and we can meet you on the street or in a nearby lot.

Further east in Charter Oak (91724), driveways at ranch-style and post-war tract homes are the usual setting. Families here often want a spare for a second driver, or need a replacement after a key falls out of a pocket. South in Covina Hills, larger-lot properties mean the vehicle may sit well up a driveway, and we simply come to wherever it is parked.

Commuters who use the Covina Metrolink station on the San Bernardino Line sometimes find their only key missing at the end of a long day. Drivers on Interstate 10, Azusa Ave, Grand Ave, Badillo St, San Bernardino Rd, and Arrow Hwy can also reach us when a car will not start away from home. Call (323) 997-8867 and tell us where you are.

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 Covina locksmith services

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

Transponder Key Programming in Covina — FAQs

What is transponder key programming?
It is the process of registering a key's embedded chip with your vehicle's immobilizer so the engine will start. Without that match, the key may turn in the ignition but the car will not run.
Can you program a key if I lost all my keys in Covina?
In many cases yes. Whether it can be done on site depends on the vehicle's make, model, and year. Call (323) 997-8867 with those details and we will tell you what to expect.
Do you come to me, or do I need to visit a shop?
We are fully mobile and have no storefront. We travel to your car anywhere in Covina, whether at home, at work, or on the street.
Are you available at night and on weekends?
Yes, we operate 24/7. You can call (323) 997-8867 at any hour to arrange service.
Why won't my duplicate key start the car?
A key that is only cut to fit the lock will open doors but lacks a programmed chip. The immobilizer does not recognize it, so the engine will not stay running until it is programmed.
How is the price determined?
It depends on your vehicle, the type of key, whether any working key exists, how many keys you want, and the time and location. We explain the factors and confirm details before starting work.
Will you need proof that the car is mine?
Yes. We ask for ID and registration or similar documentation matching the vehicle before making or programming a key. This is a routine safeguard for owners.
Is it worth getting a spare programmed now?
Usually, yes. Adding a spare while you still have a working key is typically simpler than starting from a lost-all-keys situation. We can discuss it when you call (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