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Crenshaw Lock

Key Fob Replacement in Walnut · 24/7 mobile

Key Fob Replacement in Walnut, California

Crenshaw Lock Company provides key fob replacement and programming in Walnut, California, 24/7. Our fully mobile technician comes to your car, replaces and programs remote fobs and smart keys on site, and has served the area since 1987. Call (323) 997-8867 anytime.

  • Mobile to your Walnut location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
Modern car smart key fob on dark leather
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A dead, cracked, or missing key fob rarely picks a convenient moment. In Walnut it tends to happen in a driveway off Lemon Ave, in a parking lot near Mt. San Antonio College, or at the end of a long commute on the Pomona Freeway. Today's remotes and proximity keys are small computers, and replacing one is more than cutting a piece of metal. The new fob has to be matched to your vehicle's immobilizer before the car will start.

Crenshaw Lock Company is fully mobile, so there is no shop to tow your car to. We come to wherever the vehicle is parked, whether that is a home in Walnut Heights, a gated driveway, or a campus lot. We replace and program remote key fobs and smart/proximity keys, and we are available 24 hours a day. David Shar, our owner and lead technician, has been doing this work since 1987, and the business is built on explaining clearly what is needed before we start.

Many Walnut households have more than one car in the garage, often a mix of newer models with push-button start and older ones with a simple remote. Each type is handled differently. We will look at your vehicle, tell you what kind of fob it uses, and explain what programming involves, so you are not guessing about the job.

How it works in Walnut

  1. 1

    Call and describe the situation

    Call (323) 997-8867 and tell us the make, model, and year, and whether you have any working key left. Knowing if this is a lost fob, a broken one, or a spare you want to add helps us prepare the right parts.

  2. 2

    We come to your vehicle

    Our mobile technician drives to you in Walnut, whether you are at home, at work, or stuck in a lot. Nothing needs to be towed, and there is no storefront to visit.

  3. 3

    Verify ownership and identify the fob

    Before making a key for any vehicle, we confirm you are the owner or authorized user. We then identify the exact fob type your car uses, such as a basic remote, a flip key with remote, or a push-start smart key.

  4. 4

    Cut, if needed, and program

    If the fob includes a mechanical blade, we cut it. Then we program the new fob to your vehicle's system so the remote functions and the immobilizer accept it. If an old lost fob is a concern, we can discuss removing it from the car's memory.

  5. 5

    Test everything before we leave

    We test lock, unlock, trunk, panic, and starting as applicable, and confirm the fob works with the door blade as well. You leave with a fob that has been checked on your own car.

Need key fob replacement in Walnut?

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 brands use far more complex security systems than others
  • The type of fob: a basic remote, a remote head key, or a proximity smart key with push-button start
  • Whether you still have a working key to copy from or all keys are lost, which changes the programming method
  • Whether the fob blade needs cutting or only electronic programming is required
  • How many fobs you want made, since adding a spare during the same visit is often more practical
  • Time of day and location, because we serve customers around the clock and travel to you

Why Walnut chooses us

  • Fully mobile service: we work on your vehicle where it is parked in Walnut, with no towing to a shop
  • Available 24/7, including nights and weekends when a fob failure is hardest to deal with
  • Serving Greater Los Angeles and Ventura County since 1987, with David Shar as owner and lead technician
  • We explain the fob type and programming approach before work begins, so there are no surprises
  • We verify ownership before producing keys, which protects you and your vehicle
  • We handle both older remote-style fobs and modern smart keys, so one call covers the whole household's cars

Key Fob Replacement across Walnut

Walnut sits between the San Jose Hills and the Puente Hills, and most of the city is spread-out suburban neighborhoods where the car is part of daily life. In Walnut Heights and the 91789 area, many homes have garages and long driveways, which makes at-home fob replacement simple: we park, work on the car, and you do not have to go anywhere. In gated communities like Snow Creek, we coordinate access with you so we can reach the vehicle without delay.

Students and staff around Mt. San Antonio College, along Grand Ave and near Amar Rd, sometimes lose a fob in a big campus lot or break one while rushing to class. We can meet you there and program a replacement on site. Commuters who rely on SR-60 and SR-57 face the same problem when a fob stops working at the end of a long workday, and that is exactly when around-the-clock mobile service helps.

Whether you are near Suzanne Park or Creekside Park, on Valley Blvd, Nogales St, or Pierre Rd, or in the 91788 ZIP code, the process is the same: call (323) 997-8867, tell us about the vehicle, and we come to you.

Locked out or need a locksmith now?

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Other Walnut locksmith services

See all of our Walnut services, or our citywide key fob replacement page.

Key Fob Replacement in Walnut — FAQs

Can you replace a key fob if I have lost all my keys in Walnut?
Yes. All-keys-lost situations are common, and we can generally make and program a new fob on site after verifying ownership. Call (323) 997-8867 and tell us the vehicle make, model, and year.
Do you come to me, or do I have to bring the car somewhere?
We are fully mobile and there is no storefront. Our technician comes to your vehicle anywhere in Walnut, including homes, campus lots, and gated communities.
Can you program a fob I bought online?
Often we can, depending on the vehicle and whether the fob is compatible and unused. We recommend calling (323) 997-8867 before purchasing so we can tell you whether it is likely to work with your car.
What is the difference between a remote fob and a smart key?
A remote fob typically locks and unlocks and may include a blade for the ignition. A smart or proximity key lets you unlock and start the car with the fob nearby, usually with a push-button start. Smart keys require different programming.
Are you available at night or on weekends?
Yes, we operate 24/7. A fob problem after hours in Walnut is something we can help with at any time.
Will the old lost fob still work after you program a new one?
In many vehicles, programming can be set up so a lost fob is removed from the car's memory. This depends on the vehicle, and we will explain what is possible for yours.
How is the price of a fob replacement determined?
It depends on the vehicle, the type of fob, whether you have an existing key, whether cutting is needed, and how many fobs you want. We can talk through these factors on the phone at (323) 997-8867.
Do I need to prove I own the vehicle?
Yes. We verify ownership or authorization before making any key. This protects owners from unauthorized access to their vehicles.
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