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Crenshaw Lock

Transponder Key Programming in Pasadena · 24/7 mobile

Transponder Key Programming in Pasadena, California

Crenshaw Lock Company provides mobile transponder key programming in Pasadena, California, around the clock, 24/7. We come to your vehicle and program chip keys to its immobilizer so they start the car. Lost your only key or need a spare? Call (323) 997-8867.

  • Mobile to your 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 transponder key looks like an ordinary key, but inside the plastic head is a small chip that talks to your car. When you turn the key or press the start button, the vehicle's immobilizer checks for the right coded signal. If the code is missing or wrong, the engine may crank without starting, or not crank at all. That is why a hardware-store copy cut to the right shape will often open the door and still fail to start the car.

In Pasadena this problem tends to show up in everyday places: a parking structure near Old Pasadena after a dinner on Colorado Boulevard, a driveway in Hastings Ranch, a lot near Caltech or Pasadena City College, or a street spot beside a Craftsman bungalow in Bungalow Heaven where the only key went missing. Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, led by owner and lead technician David Shar, and we are fully mobile. There is no storefront to visit and no tow required just to get a key made.

This page explains how transponder programming works, what shapes the cost, what to have ready when you call, and how it plays out around Pasadena. We do not quote prices without knowing your vehicle, and we will not make claims about arrival times. What we can say is that we are available 24/7, we come to you, and we explain the work before we start.

How it works in Pasadena

  1. 1

    You call and describe the situation

    Call (323) 997-8867 and tell us the make, model and year of the vehicle, where it is parked, and whether you still have a working key. Whether you need a spare or have lost every key changes the approach, so this first conversation matters.

  2. 2

    Confirm ownership

    Before we create a key for any vehicle, we ask you to show that it is yours. Expect to provide identification and something that ties you to the car, such as registration or title. This protects you and protects the next owner of any car we work on.

  3. 3

    Identify the key and immobilizer system

    Different manufacturers use different chip types and security systems. We identify what your vehicle needs, including whether it uses a traditional blade key with a chip, a flip key, or a push-button style fob, and we confirm the correct blank or fob before cutting or programming.

  4. 4

    Cut the key if needed

    If your vehicle uses a physical blade, we cut it on site. When all keys are lost, we can generate a cut from the vehicle's lock or from code information, depending on the model. The goal is a key that turns smoothly in the door and ignition without forcing.

  5. 5

    Program the chip to the vehicle

    Using professional programming equipment connected to the car, we register the new transponder with the immobilizer. Some vehicles allow this with an existing key; others require a diagnostic connection. We then test the key.

  6. 6

    Test everything before we leave

    We confirm the key starts the engine, locks and unlocks the doors, and that any remote buttons work. If you have older keys you no longer trust, ask us about removing them from the vehicle's memory where the system allows it.

Need transponder key programming in 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: some vehicles use simple chip systems, while others use encrypted or proximity systems that require more time and equipment.
  • Whether you have a working key: adding a spare from an existing key is generally simpler than starting from zero when every key is lost.
  • Type of key: a basic chip key, a flip key, a remote head key and a smart proximity fob all involve different parts and programming steps.
  • Number of keys needed: programming several keys in one visit is different from a single spare, and some systems must program all keys together.
  • Time of day and location: we are available 24/7, and after-hours calls or hard-to-reach spots can affect the overall cost of the visit.
  • Cutting requirements: laser-cut or high-security blades take different machinery than a standard edge-cut key.

Why Pasadena chooses us

  • Fully mobile service: we bring the cutting and programming equipment to your car in Pasadena, so you avoid towing a car you cannot start.
  • In business since 1987: David Shar and our team have decades of experience with how locks and vehicle security have changed over time.
  • Available 24/7: lost keys do not wait for business hours, and neither do we.
  • Ownership checks every time: we verify that you own the vehicle before making keys, which is a sign of a legitimate locksmith.
  • Clear explanation up front: we tell you what your vehicle needs and what affects cost before work begins, with no invented numbers or pressure.
  • Residential and automotive in one call: if your house keys were on the same ring as the lost car key, we can also talk through rekeying the home.

Transponder Key Programming across Pasadena

Pasadena's layout shapes how car key problems happen. Around Old Pasadena and the Playhouse District, visitors and diners park in structures and street spaces near Colorado Boulevard and Fair Oaks Avenue, and a key dropped or left inside a vehicle can strand someone far from home. In ZIP 91101 and 91103 we regularly think about that mix of weekend crowds and late-night calls, and we work wherever the car sits, not just at an address.

Residential streets matter too. In Bungalow Heaven and Garfield Heights, many homes have narrow driveways or street-only parking, and a lost key may be tied to an old keyring that also holds antique house keys. In Madison Heights and Hastings Ranch (including ZIP 91107 and 91104), driveways and garages are more common, and families often want a spare programmed so no one is stuck when a single key disappears. If your keys went missing in the same incident, we can also discuss rekeying the home while preserving original hardware.

Pasadena drivers also depend on I-210, SR-134 and the Arroyo Seco Parkway, so a car that will not start can disrupt a commute quickly. Whether you are near the Rose Bowl on a game day, the Norton Simon Museum, Huntington Hospital, Caltech, or Pasadena City Hall, call (323) 997-8867 and we will come to you. ZIP codes 91105 and 91106 are part of the same service area.

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 Pasadena locksmith services

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

Transponder Key Programming in Pasadena — FAQs

What is a transponder key?
It is a vehicle key with a small electronic chip in the head. The car's immobilizer reads the chip's code, and the engine will only start if the code matches. Many vehicles from the late 1990s onward use this kind of system.
Can you program a key if I lost all my keys in Pasadena?
In most cases, yes. All-keys-lost situations take more steps than adding a spare, but we come to your vehicle with the equipment to do it. Call (323) 997-8867 with your vehicle details 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 travel to your car, whether it is in a Pasadena driveway, a parking structure, or on the street.
Can a hardware store key start my car?
A basic copy may open the door, but if your vehicle has an immobilizer the chip must be programmed to the car or the engine will not start. A properly programmed transponder key solves that.
What do I need to show to get a key made?
We verify ownership before making a key, usually with identification and registration or title for the vehicle. This protects you from someone else getting a key to your car.
How much does transponder key programming cost?
It depends on the vehicle, key type, number of keys, whether you have an existing key, and the time and location of the call. We explain what applies to your car when you call (323) 997-8867.
Do you work at night and on weekends?
Yes. Crenshaw Lock Company is available 24/7, including nights, weekends and holidays, anywhere in our service area including Pasadena.
Can you remove an old lost key from my car's memory?
On many vehicles, yes. When we program new keys, we can often erase the old ones so a lost key will no longer start the car. Ask us when you book, since some systems handle this differently.
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