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Crenshaw Lock

Transponder Key Programming in South Pasadena · 24/7 mobile

Transponder Key Programming in South Pasadena, California

Crenshaw Lock Company provides mobile transponder key programming in South Pasadena, California, 24 hours a day, 7 days a week. We come to your vehicle and program chip keys to its immobilizer, so there is no tow and no storefront trip. Call (323) 997-8867.

  • Mobile to your South Pasadena 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 has to be recognized by your vehicle's immobilizer before the engine will run. If you have lost your only key, broken one, or just want a spare before you need it, the new key must be cut if needed and then programmed to your specific car. That is the work we do, and in South Pasadena we do it where your car is parked.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, led by owner and lead technician David Shar. We are fully mobile, which matters in a compact, walkable city like this one. Cars here get left near the Metro A Line Mission station, along Fair Oaks Avenue, outside Craftsman bungalows with narrow driveways, and on steep streets in Monterey Hills. Bringing the equipment to the vehicle avoids towing and keeps you from having to find a shop.

This page explains how transponder programming works, what affects the cost, and what to have ready when you call. We do not quote prices from a web page, because the right answer depends on your vehicle and your situation. We would rather tell you honestly what is involved and then give you a clear quote once we know your make, model, and year.

How it works in South Pasadena

  1. 1

    You call and describe the situation

    Call (323) 997-8867 any time of day or night. Tell us the make, model, and year of the vehicle, whether you still have a working key, and where the car is parked. This lets us confirm what the job involves before we head out.

  2. 2

    We come to your vehicle

    Because we are fully mobile, the work happens at your car, whether that is a driveway in Altos de Monterey, a curb near Garfield Park, or a lot off Huntington Drive. We do not ask you to tow the car anywhere.

  3. 3

    Verify ownership

    Before we create or program a key, we ask for proof that the vehicle is yours, such as registration or title along with matching identification. This protects you and is a normal, responsible part of the work.

  4. 4

    Cut the key and prepare the chip

    If you need a new key blank, we cut it to your vehicle's lock. The transponder chip inside is matched to the system your car uses. Some vehicles accept a straightforward programming session, while others need more steps depending on the manufacturer.

  5. 5

    Program to the immobilizer

    Using professional programming equipment, we pair the new key with your car's immobilizer so the engine starts. When there is no working key left, we can add keys to the vehicle's system from scratch, depending on the model.

  6. 6

    Test everything before we leave

    We test that the key turns the ignition, starts the engine, and operates the door lock. If the key has remote buttons, we check those too. You leave knowing each key works, not hoping it does.

Need transponder key programming in South Pasadena?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

What affects the price

  • Make, model, and year of the vehicle, since immobilizer systems differ widely between manufacturers and some are more involved to program than others.
  • Whether you still have a working key. Adding a spare to a car with a working key is generally simpler than creating a first key when all keys are lost.
  • The type of key: a basic transponder key, a key with built-in remote buttons, a flip key, or a smart proximity key each involve different hardware and programming steps.
  • Whether a key blank needs to be cut, including laser-cut or high-security keys that need specialized cutting equipment.
  • The number of keys you want programmed in one visit, since having a spare made at the same time is often more practical than a second call later.
  • Time and location of the call, as after-hours service and hard-to-reach parking spots can affect how the job is scheduled and quoted.

Why South Pasadena chooses us

  • Fully mobile service: we bring programming equipment to your car instead of asking you to tow it to a shop, because we have no storefront.
  • Serving the area since 1987, with owner and lead technician David Shar involved in the work.
  • Available 24 hours a day, 7 days a week, which matters when a key problem strands you at night or on a weekend.
  • Ownership verification on every job, so a key is only made for the person who actually owns the car.
  • Straight explanations of what your specific vehicle needs, and a quote based on real factors rather than a generic number.
  • Familiarity with local conditions, from tight Craftsman-era driveways to hillside streets and walkable shopping areas where parking is limited.

Transponder Key Programming across South Pasadena

South Pasadena is only about 3.4 square miles, but its mix of hillside streets, historic neighborhoods, and busy commercial strips creates its own key problems. In the Mission Street District, drivers visiting Mission West antique row, catching a show at the Rialto Theatre, or stopping at Fair Oaks Pharmacy for the soda fountain can lose or break a key in a tight parallel parking spot. In Monterey Hills and Altos de Monterey, cars often sit in steep driveways or on narrow roads where a tow truck is awkward. A mobile technician avoids that.

Residents and visitors in ZIP codes 91030 and 91031 also commute heavily. Many people leave a car near the Metro A Line Mission station, then return after a long day to find a key fob that no longer works or has gone missing. Others park along Fair Oaks Avenue, Fremont Avenue, or Huntington Drive for the Farmers Market or an evening out. We come to wherever the vehicle is, including near I-110 on-ramps and side streets around Garfield Park.

If you also need work on the property itself, such as rekeying an older Craftsman after closing escrow, we can discuss that separately. For this service, our focus is simple: get a properly programmed key in your hand without moving your car. Call (323) 997-8867 and tell us where you are parked.

Locked out or need a locksmith now?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

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Other South Pasadena locksmith services

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

Transponder Key Programming in South Pasadena — FAQs

What is a transponder key?
It is a car key with a small electronic chip inside the head. The chip sends a code to your vehicle's immobilizer, and the engine will only start if the code matches. A key that is only cut to fit the ignition will usually turn but not start the car.
Can you program a key if I have lost all my keys in South Pasadena?
In many cases, yes. Depending on the vehicle, we can cut a new key and program it to the car even when no working key remains. Call (323) 997-8867 with the make, model, and year so we can tell you what to expect for your specific car.
Do I need to tow my car to you?
No. We are fully mobile and have no storefront. We come to your vehicle, whether it is in a driveway in Monterey Hills, on Mission Street, or in a lot near the Metro station.
What do I need to show you?
We will ask for proof of ownership, such as registration or title, along with identification that matches. This is a standard safeguard so keys are made only for the rightful owner.
Is it cheaper to get a spare before I lose my only key?
Often it is simpler, because adding a key to a car that still has a working one is usually less involved than starting from no keys. We cannot quote a figure here, but you can call (323) 997-8867 to discuss your vehicle.
Can you program a key I bought online?
Sometimes. Compatibility depends on the vehicle and the key itself, and some online keys are the wrong type or are already locked to another car. It is best to call us first so we can tell you whether it is likely to work.
Do you work at night and on weekends?
Yes. We are available 24 hours a day, 7 days a week. We do not make timing promises, but you can reach us any time at (323) 997-8867.
Can you also make keys with remote buttons or smart keys?
We handle a range of key types, including transponder keys, remote head keys, and many flip and proximity keys. What is possible depends on the vehicle, so give us the make, model, and year when you call.
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