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Crenshaw Lock

Key Fob Replacement in Altadena · 24/7 mobile

Key Fob Replacement in Altadena, California

Crenshaw Lock Company provides mobile key fob replacement and programming in Altadena, California, available 24/7. We come to your car, replace and program remote fobs and smart keys on site, and there is no shop visit needed. Call (323) 997-8867.

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

Losing a key fob is rarely a convenient event. In Altadena it might happen at the Sam Merrill Trailhead after a hike up toward Cobb Estate, outside Farnsworth Park after an evening concert, or in the driveway of a house you are still sorting out after a very hard year for this community. A modern fob is more than a button remote. Many contain a transponder chip the car must recognize before it will start, and proximity keys talk to the vehicle wirelessly. That is why a hardware store copy usually will not work.

Crenshaw Lock Company is fully mobile. We have no storefront, so you never have to get a car with no working key to a shop. We bring the equipment to wherever the vehicle is parked, whether that is a street off Lake Ave, a driveway in Janes Village, or a hillside lot near Altadena Drive, and we do the work there. David Shar has run this business since 1987, and the company has watched car key technology change from simple cut keys to the encrypted fobs of today.

We replace and program remote key fobs, flip-style remotes, and smart or proximity keys. If you have lost every key, we can often create a new one from scratch, subject to the vehicle's security system. If you still have one working key, the job is usually simpler. Either way, we tell you what your specific car requires before we start, and we are available around the clock, including nights and weekends.

How it works in Altadena

  1. 1

    Call and describe the vehicle

    Call (323) 997-8867 and tell us the make, model, and year, plus whether you have any working key left. Those details largely determine which fob is compatible and how it gets programmed. We can usually tell you what the job involves during that call.

  2. 2

    We come to your car

    Because we are fully mobile, we drive to you in Altadena, whether you are parked at Charles White Park, at home, or at a trailhead. We confirm the vehicle and your ownership before touching anything.

  3. 3

    Verify ownership

    We ask for ID and proof the vehicle is yours, such as registration or title. This protects you. A locksmith who skips this step can be helping someone else drive off in your car.

  4. 4

    Prepare the fob or key

    We match or cut the fob to your vehicle. Where a physical emergency blade is part of the fob, it is cut to your lock. The transponder and remote functions are then prepared for pairing with your car's computer.

  5. 5

    Program and pair

    Using professional programming equipment, we register the new fob with the vehicle. If it makes sense, we also set up any additional fobs you have so everything works together. Lost fobs can often be removed from the car's memory so they no longer start it.

  6. 6

    Test everything

    Before we leave, we test lock, unlock, trunk, panic, remote start where equipped, and the ignition or push-button start. You see it all working, and we answer questions about spares and care.

Need key fob replacement in Altadena?

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 more complex security systems than others
  • Type of key: a basic remote head key, a flip key, or a smart proximity key all differ in hardware cost and programming effort
  • Whether you have a working key, because programming from an existing key is typically simpler than an all-keys-lost situation
  • Whether a physical emergency blade must be cut and whether it requires high-security cutting
  • Number of fobs needed, as adding spares during the same visit is usually more efficient than a second trip
  • Time of day and location, since late-night or hard-to-reach hillside calls involve different logistics than a daytime driveway visit

Why Altadena chooses us

  • Fully mobile service with no storefront, so a car that will not start never has to be towed just to get a key made
  • Operating since 1987, with decades of experience as automotive key technology has moved from cut keys to encrypted fobs
  • Available 24/7, including nights, weekends, and holidays
  • Ownership verification on every job, which protects you from key-related theft
  • We explain what your specific vehicle needs before work begins and tell you if a dealer is genuinely the better route
  • Also able to handle home locks, so one company can cover the car and the house for rebuilding families

Key Fob Replacement across Altadena

Altadena is a foothill community with a mix of older homes and new construction. In Janes Village, driveways are often narrow and cars park along tree-lined streets, and we work right at the curb or in the drive. Around Christmas Tree Lane on Santa Rosa Avenue, the Altadena Country Club, and The Meadows, larger lots and hillside driveways are common, and we plan for access accordingly.

Many residents are in the middle of rebuilding after the January 2025 Eaton Fire. That often means new vehicles, replaced belongings, and contractors who need keys. If a fob went missing in the upheaval, or you need spares for a family sharing one car while a home is rebuilt, we can program them on site. If you need new locks on the rebuild too, we handle that as well.

We serve both ZIP codes, 91001 and 91003, and the main routes through town including Lake Ave, Lincoln Ave, Fair Oaks Ave, Altadena Dr, and Woodbury Rd. Whether you are stuck at Farnsworth Park, Charles White Park, or the trailhead near the Mount Lowe Railway site, call (323) 997-8867 and we will come to you.

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 Altadena locksmith services

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

Key Fob Replacement in Altadena — FAQs

Can you replace a key fob if I lost all my keys?
Often yes. All-keys-lost situations take more work than copying from an existing key, but many vehicles can still be handled on site. Call (323) 997-8867 with your make, model, and year and we will tell you what to expect.
Do I need to tow my car to you?
No. We are fully mobile and have no storefront. We come to your vehicle anywhere in Altadena and program the fob on the spot.
Is it cheaper to go to the dealer?
It depends on the vehicle. Price comes down to the fob type, the car's security system, and your situation. We explain the options honestly, and a dealer may be the right choice for certain models.
Will my old lost fob still work?
In many cases we can erase lost fobs from the car's memory during programming so only the fobs you hold will operate it. Ask us about this when you call (323) 997-8867.
What proof of ownership will you need?
Government ID plus registration, title, or similar paperwork showing the vehicle is yours. We require this on every automotive job to protect owners.
Can you program a fob I bought online?
Sometimes. Online fobs vary in quality and compatibility, and some are locked or wrong for the vehicle. Tell us what you have beforehand and we will say whether it is likely to work.
Do you work at night or on weekends in Altadena?
Yes. We are available 24/7. If you are stranded at a trailhead or locked out at home after dark, call (323) 997-8867.
Can you make spare fobs at the same time?
Yes, and it is usually the smart move. Adding a spare during the same visit avoids a second trip and a future emergency, which matters for households sharing a car during a rebuild.
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