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(323) 997-8867
Crenshaw Lock

Car Key Replacement in Walnut · 24/7 mobile

Car Key Replacement in Walnut, California

Crenshaw Lock Company provides car key replacement in Walnut, California, 24/7. Our fully mobile technician cuts and programs a new key at your vehicle, even if you have no original key. Call (323) 997-8867 and tell us the make, model, and year of your car.

  • Mobile to your Walnut location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
New flip car key and key blank ready for cutting
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Losing the only key to your car is stressful anywhere, but in Walnut it tends to happen at inconvenient moments: in a parking lot near Mt. San Antonio College after an evening class, at a trailhead or park such as Suzanne Park or Creekside Park, or in a driveway when you are about to leave for the SR-60 commute. Modern car keys are not just pieces of cut metal. Most carry a transponder chip, and many are proximity fobs or flip keys that must be electronically paired with your vehicle before the engine will start.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead tech David Shar built the business around coming to the customer. We are fully mobile. There is no storefront to visit and no tow to a dealership required. We come to your car in Walnut, cut the key, program it to your vehicle, and test it before we consider the job done.

This matters most when you have no spare. Many people assume a dealer is the only option when every key is lost, but a mobile automotive locksmith can generally create a new key from your vehicle's information and program it on site. Whether you have a basic transponder key, a laser-cut key, a remote head key, or a push-button start fob, we can talk through what your car needs when you call (323) 997-8867.

How it works in Walnut

  1. 1

    Call and describe your vehicle

    Call (323) 997-8867 any hour. We will ask for the make, model, and year, what type of key you have or had, and where the car is parked. If you are in a Walnut driveway, a campus lot, or on the shoulder near an SR-60 on-ramp, tell us so we can plan the job.

  2. 2

    Confirm ownership

    Before making a key for a vehicle, we need reasonable proof that you are the owner or authorized user, typically a registration or title and matching photo ID. This protects you and is a standard, responsible practice in the trade.

  3. 3

    Identify the key type and cut the key

    We determine whether your vehicle uses a traditional cut key, a transponder key, a laser-cut or high-security blade, or a smart fob. When there is no original to copy, the key can be cut by code or by decoding the lock, then shaped on mobile equipment at your vehicle.

  4. 4

    Program the key to the car

    Using diagnostic and programming tools, we pair the new key or fob with your vehicle's immobilizer so it starts the engine. Depending on the vehicle, this can also include programming remote lock and unlock buttons.

  5. 5

    Test everything before we leave

    We test the door lock, ignition or push-button start, and any remote functions, and we make sure the key operates properly more than once. If you want a spare, it is much easier to add one during the same visit.

  6. 6

    Advice on lost-key security

    If a lost key could be in someone else's hands, ask us about having the old key removed from the vehicle's memory when the system allows it, so only the keys you hold will work.

Need car key 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

  • The type of key your car uses: a basic transponder key, a laser-cut key, a flip key, or a proximity smart fob all involve different parts and programming effort.
  • Make, model, and year, since some manufacturers have more complicated immobilizer systems than others.
  • Whether you have an original key to work from or all keys are lost, which can change how the key is cut and how much programming is required.
  • How many keys you need, including whether you want a spare made during the same visit.
  • Whether remote buttons and other features need programming in addition to the engine-start function.
  • Time of day and the location of the vehicle, since we operate 24/7 and travel to you throughout the area.

Why Walnut chooses us

  • Fully mobile service: we bring cutting and programming equipment to your car in Walnut, so you do not need a tow or a trip to a dealer.
  • Serving Greater Los Angeles and Ventura County since 1987, with owner and lead tech David Shar behind the work.
  • Available 24/7, which helps when a key goes missing late at night or before an early commute.
  • We can often make a key when you have no original, rather than requiring you to find a spare first.
  • We explain pricing factors openly before work begins and test the key thoroughly before finishing.
  • Experience with both older cut keys and newer transponder and smart-key systems, so we can match the solution to your vehicle.

Car Key Replacement across Walnut

Walnut sits between the San Jose Hills and Puente Hills, and its car-dependent layout means a lost key quickly disrupts the day. Residents in Walnut Heights and the gated Snow Creek community park in private driveways and garages, where we can work comfortably at the vehicle. Families with several cars often find that one lost fob leaves everyone short, so having a spare made on site is a common request. Many homes in ZIP code 91789 are single-family tract homes on larger lots, so there is usually space to park and work.

The Mt. San Antonio College area has its own pattern. Students and staff leave cars in large lots for long stretches, and a key dropped on campus or locked inside a vehicle can happen far from home. Commuters on Grand Ave, Valley Blvd, Lemon Ave, and Nogales St, along with those heading to SR-60 or SR-57, also rely on their vehicles daily. We come to wherever the car is parked, whether that is a campus lot, a street near Amar Rd or Pierre Rd, or a driveway in ZIP code 91788.

If you are out near Suzanne Park or Creekside Park, or on a hillside property in the Walnut hills where trucks and trailers are common, we can help with those vehicles too. Call (323) 997-8867 and we will talk through your situation and get a replacement key moving.

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 Walnut locksmith services

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

Car Key Replacement in Walnut — FAQs

Can you make a car key in Walnut if I have lost every key?
In many cases, yes. A mobile automotive locksmith can often cut a new key and program it to the vehicle without an original. Call (323) 997-8867 with your vehicle details and we will tell you what is possible for your car.
Do I need to tow my car to a dealer?
Usually not. We are fully mobile and perform cutting and programming at your car, whether it is in a Walnut driveway, a parking lot near Mt. SAC, or along a city street.
What do I need to show to get a key made?
We ask for proof of ownership or authorization, such as registration or title, and a matching photo ID. This keeps your vehicle secure and is standard practice.
Do you work at night and on weekends?
Yes. Crenshaw Lock Company is available 24/7. Call (323) 997-8867 any time and we will help you plan the visit.
Can you program smart keys and push-button fobs?
We work with many transponder keys, remote head keys, and proximity fobs. Support depends on the make, model, and year, so call us with your vehicle information to confirm.
How is the price determined?
Price depends on the key type, your vehicle's make, model, and year, whether an original key exists, how many keys you need, and any remote programming. We explain these factors before work starts.
Will the lost key still start my car?
It may, unless it is removed from the vehicle's memory. Depending on the system, we can often program so only the keys you currently hold work. Ask about this when you call.
Should I get a spare key while you are there?
It is a smart idea. Adding a spare during the same visit is generally easier than starting over after losing the only key again. Mention 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