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Crenshaw Lock

Key Fob Replacement in Monrovia · 24/7 mobile

Key Fob Replacement in Monrovia, California

Crenshaw Lock Company provides mobile key fob replacement and programming in Monrovia, California, 24 hours a day, 7 days a week. We come to your car, whether you are in Old Town or up in the foothills. Call (323) 997-8867 to talk through your vehicle and get started.

  • Mobile to your Monrovia 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 lost or failing key fob rarely picks a convenient moment. In Monrovia it might happen after dinner on Myrtle Avenue, at the Metro A Line station before a morning commute, or in the driveway of a hillside home when the car simply will not recognize the key. Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and our work is fully mobile: there is no shop to tow your car to. We bring the equipment to wherever the vehicle is parked.

Key fob replacement covers more than one situation. Sometimes the fob still works but the buttons are worn or the case has cracked. Sometimes the battery is dead and the car will not accept a proximity key. And sometimes the key is gone entirely, which means a new fob has to be cut or generated and programmed to your specific vehicle so the immobilizer accepts it. We handle remote key fobs and smart or proximity keys, and we will tell you plainly what your car needs before any work begins.

Owner and lead technician David Shar built the business on straightforward service: explain the options, do the work on site, and make sure every button and the start function work before we leave. If you are not sure whether you need a replacement, a battery, or a reprogram, call (323) 997-8867 and describe what the car is doing. Often that conversation alone clears up what the next step should be.

How it works in Monrovia

  1. 1

    Tell us about the vehicle

    When you call, we ask for the make, model, and year, what type of key you have (a flip key, a remote with a separate blade, or a push-button start smart key), and whether you have any working keys left. That helps us confirm what can be done and what to bring.

  2. 2

    We come to you in Monrovia

    Because we are fully mobile, the work happens where the car is: a driveway off Mountain Avenue, a curb in Old Town, a parking lot near Library Park, or a spot by the Metro A Line station. We are available around the clock.

  3. 3

    Verify ownership

    Before creating a new key for a vehicle, we need to confirm it is yours. Expect to show identification and proof of ownership, such as registration or title. This protects you and is standard practice for responsible automotive locksmiths.

  4. 4

    Cut, generate, or source the fob

    Depending on the vehicle, we prepare a new fob and, if it has an emergency blade, cut it to match. We make sure the fob is compatible with your car's system rather than guessing from the exterior.

  5. 5

    Program and pair it to the car

    We program the new fob so the vehicle recognizes it, including the immobilizer chip where applicable. On many vehicles this also lets us add a spare or remove a lost fob from the car's memory so a missing key cannot be used.

  6. 6

    Test everything before we leave

    We check lock, unlock, trunk or hatch, panic, remote start if equipped, and the start function itself. You should leave with a fob you have seen work, not one we hope works.

Need key fob replacement in Monrovia?

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 far more involved to program than others.
  • Type of key: a basic remote differs from a push-button smart or proximity key.
  • Whether you have a working key: copying an existing key is usually simpler than creating one when all keys are lost.
  • Whether a physical emergency blade must be cut in addition to the fob being programmed.
  • Time of day and location, because after-hours and out-of-the-way calls take different logistics.
  • How many fobs you need, as adding a spare during the same visit is often more efficient than a separate trip later.

Why Monrovia chooses us

  • Fully mobile service: no storefront and no towing your car anywhere, because we come to you.
  • In business since 1987, with owner David Shar personally leading the work.
  • Available 24/7, which matters when a dead fob strands you late at night or before an early commute.
  • We explain whether you need a battery, a reprogram, or a full replacement, and do not sell more than the situation calls for.
  • We test every function of the fob before finishing, and can remove lost fobs from the car's memory when the vehicle allows it.
  • Familiar with the full range of local needs, from foothill homes to Old Town storefronts, so we can also help if a lockout or a rekey is part of the same call.

Key Fob Replacement across Monrovia

Monrovia is a city where cars and daily routines are spread across very different settings. In Old Town Monrovia, people park along Myrtle Avenue to eat, shop, or catch a show near the Aztec Hotel, and a dead fob there often means a stuck car on a busy evening. Commuters using the Metro A Line station or the I-210 (Foothill Fwy) on-ramps depend on their fobs working first thing in the morning, and a failed proximity key is hard to troubleshoot in a parking structure or lot.

In Mayflower Village and the residential streets around Huntington Drive, many households keep more than one vehicle, and an aging fob on a second car is a common reason for a call. North Monrovia in the foothills, up toward Monrovia Canyon Park and above Foothill Boulevard, adds its own twist: long driveways, steep grades, and homes where the car is parked well away from the street. Our mobile setup means we meet you at the vehicle, wherever that is, in ZIP codes 91016 and 91017.

If you have just bought a home or a car in town and are collecting keys, it is also a good moment to add a spare fob. Having a second programmed fob in a drawer costs far less hassle than starting from scratch with no working key. Call (323) 997-8867 any time and we will talk through the options 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 Monrovia locksmith services

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

Key Fob Replacement in Monrovia — FAQs

Can you replace a key fob in Monrovia if I have lost all my keys?
Yes, in most cases. When no working key remains, we can create and program a new fob for your vehicle after verifying ownership. Call (323) 997-8867 with your make, model, and year and we will explain what is possible for your car.
Do I need to tow my car to you?
No. We are fully mobile and have no storefront, so we come to your car anywhere in Monrovia, whether that is Old Town, Mayflower Village, or a hillside driveway in North Monrovia.
What is the difference between a remote fob and a smart key?
A remote fob typically has buttons and often a physical blade used to start the car. A smart or proximity key lets the car detect the key nearby and start with a push button. Both can usually be replaced and programmed, but the process differs by vehicle.
Will my old, lost fob still work after you program a new one?
On many vehicles we can erase lost fobs from the car's memory during programming, so the missing key will no longer start or unlock it. This depends on the vehicle, and we will tell you what applies to yours.
What do I need to show to get a new fob made?
Expect to provide identification and proof that the vehicle is yours, such as registration or title. This is a standard safeguard and helps ensure keys only go to the rightful owner.
Is my fob dead or just the battery?
A weak battery is the most common cause of a fob that works intermittently or at short range. If a new battery does not help, the fob may need reprogramming or replacement. Call (323) 997-8867 and describe the symptoms, and we can help sort it out.
Can you work at night or on weekends?
Yes. Crenshaw Lock Company is available 24/7, including nights, weekends, and holidays, throughout Monrovia and the surrounding area.
How is the price of a replacement fob determined?
It depends on the vehicle, the type of key, whether you have a working key, whether a blade needs cutting, and how many fobs you want. We talk through these factors on the phone so you know what to expect before we begin.
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