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Crenshaw Lock

Transponder Key Programming in Cerritos · 24/7 mobile

Transponder Key Programming in Cerritos, California

Crenshaw Lock Company provides mobile transponder key programming in Cerritos, California, 24/7. We come to your car, whether it's at home, work, or the mall, and program chip keys to your vehicle's immobilizer. Call (323) 997-8867 to describe your situation and your vehicle.

  • Mobile to your Cerritos 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
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A modern car key is more than a cut piece of metal. Inside the plastic head is a small transponder chip that talks to the vehicle's immobilizer, and if the car doesn't recognize that chip, the engine won't run, no matter how perfectly the blade turns in the ignition. Programming is the step that teaches the car to accept a new key. For Cerritos drivers, who commute along SR-91 and I-605 and park in mall lots, office centers, and driveways, a lost or failing key tends to show up at the worst moment.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and we are fully mobile. There is no storefront to drive to, which matters when your only key is gone and the car isn't going anywhere. We bring the equipment to the vehicle, wherever it is parked, and handle the cutting and programming on site. We are available around the clock, so a late night after a show or an early morning before work doesn't have to mean waiting for a business to open.

This page explains how transponder programming works, what affects the cost without quoting numbers we can't stand behind, and what to expect when you call. If you are not sure whether your key has a chip, the make, model, and year of the vehicle usually tell us enough to start the conversation.

How it works in Cerritos

  1. 1

    You call and describe the vehicle

    Call (323) 997-8867 and tell us the make, model, and year, where the car is parked, and whether you have any working key. Whether you have a spare changes the approach, so we ask about that early.

  2. 2

    We meet you at the vehicle

    Because we are mobile, we come to you. That could be a driveway near Cerritos Towne Center, a spot at the Cerritos Auto Square, or a parking structure by Los Cerritos Center. We confirm the vehicle and verify that you are the owner or authorized to have a key made.

  3. 3

    Key selection and cutting

    We match the correct key blank or fob to your vehicle. If you lost every key, we can cut a new blade on site from the vehicle's lock or key code, so you aren't left with a chip but no way to turn the ignition.

  4. 4

    Immobilizer programming

    We connect programming equipment to the vehicle and register the new transponder with the immobilizer. Depending on the vehicle, this may involve working through the diagnostic port and security procedures specific to that manufacturer.

  5. 5

    Testing everything

    We test the key in the door, the ignition, and, if it is a fob, the remote functions. We start the car more than once so you know it isn't a one-time success.

  6. 6

    Spare key and advice

    If you only had one key, we recommend making a spare while we are there, since adding a key is usually simpler than starting from nothing. We also explain what to do if a key stops working in the future.

Need transponder key programming in Cerritos?

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: some manufacturers use more involved immobilizer systems than others, which affects the time and equipment required.
  • Whether you have a working key: adding a key to a car that still has one is generally less involved than programming when every key is lost.
  • Type of key: a basic chip key, a remote head key, a flip key, and a smart proximity fob each involve different hardware and procedures.
  • Cutting needs: a key that needs a new blade cut, especially a high-security laser-cut style, differs from a chip-only programming job.
  • Time and location: a service call at an unusual hour or at a hard-to-reach spot can factor in, and we will explain this when you call.
  • Number of keys: programming multiple keys in one visit is different from a single key, and we will discuss it on the phone.

Why Cerritos chooses us

  • Fully mobile since 1987: we come to the car, so you never need to tow a vehicle just to get a key made.
  • 24/7 availability: lockouts and lost keys don't follow business hours, and neither do we.
  • Owner-led experience: David Shar leads the work, drawing on decades of automotive and residential lock experience.
  • On-site cutting and programming together: one visit can cover both the blade and the chip, instead of splitting the job between two vendors.
  • Honest guidance: if a dealer visit or a different fix really makes more sense for your vehicle, we will say so rather than promise something we cannot do.
  • Broader lock knowledge: we also handle home and commercial locks, so we understand how a car key fits in with the rest of your keys.

Transponder Key Programming across Cerritos

Cerritos is a master-planned city with a car-centered rhythm. Residents move between neighborhoods like Cerritos Towne Center, shopping and dining in the Los Cerritos Center district, and commuting onto SR-91 and I-605. Streets such as South St, Del Amo Blvd, and Bloomfield Ave carry a lot of that daily traffic, and a key that dies in a parking lot along any of them is a real disruption.

The Cerritos Auto Square is one of the more distinctive features of the city, and it creates a scenario we see often: someone loses the only key or fob to a vehicle and needs on-site transponder programming and a replacement cut. We can meet you in the 90703 area, at the Auto Square or elsewhere, and handle it without towing. The same goes for cars parked near the Cerritos Center for the Performing Arts, the Cerritos Library, or the Sculpture Garden at the Civic Center, where an evening out can end with a missing key.

Many homes here are two-story tract houses from the 1970s and townhome or condo communities, and plenty of households have several cars and several keys floating around. If one key fails or goes missing, we can program a replacement at home and suggest a spare so you aren't caught out again. Since we are mobile only, we simply come to wherever your car is in Cerritos.

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 Cerritos locksmith services

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

Transponder Key Programming in Cerritos — FAQs

Can you program a transponder key if I lost all my keys in Cerritos?
In many cases, yes. We can often cut a new key and program it to the immobilizer on site, though it depends on the vehicle. Call (323) 997-8867 with the make, model, and year and we will tell you what to expect.
Do I need to tow my car to you?
No. Crenshaw Lock Company is fully mobile, with no storefront. We come to your vehicle, whether it is at home, at work, or at a lot near Los Cerritos Center.
Are you available at night or on weekends?
Yes, we are available 24/7. If you need a key at an odd hour, call (323) 997-8867 and we will talk through your situation.
What is a transponder key?
It is a key with a small chip in the head that sends a code to the car's immobilizer. If the code isn't recognized, the engine will not start even if the blade turns the ignition.
Can you help if I lost the only key at the Cerritos Auto Square?
Yes, that is a situation we are set up for. We can come to the Auto Square, cut a replacement, and program it on site. Bring proof of ownership and call (323) 997-8867.
Do I need to prove I own the vehicle?
Yes. We will ask for identification and proof of ownership or authorization before making a key. This protects you and is standard practice for responsible locksmiths.
Is a locksmith key as good as a dealer key?
For many vehicles, a properly programmed key works the same way as one from a dealer. Some vehicles have restrictions, and we will tell you honestly if yours is one of them.
Should I make a spare key?
We recommend it. Having a second programmed key is much easier than recovering from a total loss, and it can be done during the same visit.
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