About this service

Most vehicle keys made since the mid-1990s contain a transponder chip that communicates with the car's immobilizer. If the chip signal is absent or wrong, the car will not start. Transponder key replacement requires both accurate key cutting and proper chip programming. We do both on-site for most makes and models. Buying a blank online and going to a hardware store to cut it will not work without the programming step.

What you get

Both cutting and programming done on-site
Works with all major transponder chip types
More affordable than dealership in most cases
No towing required
Upfront pricing before any work begins

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Common Causes of Transponder Keys

A lost key with no working spare

When the only transponder key is lost, the vehicle needs both a new cut key and a properly programmed chip before it will start.

A damaged or cracked transponder chip

A key that's been dropped, run over, or physically stressed can crack the internal chip even if the blade still looks fine.

Buying a used vehicle with an unknown key history

A used car purchase sometimes comes with a key that doesn't match the vehicle's current immobilizer programming.

A hardware store cut a blank without programming

A common scenario is a key that was cut to fit the lock but never programmed, so it turns the ignition but the engine won't stay running.

Wanting a spare transponder key on hand

Getting ahead of a future lockout or lost-key situation by having a properly cut and programmed spare made in advance.

An intermittent starting issue traced to the chip

A vehicle that sometimes starts and sometimes doesn't can be a sign of a weakening transponder signal rather than a bigger mechanical problem.

A key duplicated years ago from a worn original

A key copied from an already-worn original sometimes carries the same wear pattern forward, leading to an earlier-than-expected chip or cut failure.

Corrosion inside the ignition affecting chip reading

A corroded ignition reader coil can fail to read even a properly programmed transponder chip, which is sometimes mistaken for a bad key.

Switching to an aftermarket key from an OEM one

Owners replacing an expensive OEM transponder key with a more affordable aftermarket option need it properly cut and chip-matched to work.

The Risks of DIY Transponder Keys

A hardware store can cut the blade but not the chip

Standard key-cutting kiosks and hardware stores lack the equipment to program a transponder chip, so the resulting key won't start the car.

Wrong chip type for the vehicle

Transponder chips vary by manufacturer and even by model year, and an incorrect chip type simply won't communicate with the immobilizer.

Programming attempts can trigger security lockout

Repeated failed programming attempts can trip the vehicle's security system, requiring a dealer-level reset.

Blade-only cutting mistakes damage the ignition cylinder

An improperly cut blade can bind or damage the ignition cylinder with repeated use, turning a key problem into an ignition repair.

Buying a wrong or counterfeit chip online

Aftermarket chips sold online sometimes don't match the exact frequency or encryption the vehicle expects.

Multiple failed programming attempts

Repeated unsuccessful programming attempts can leave the vehicle's immobilizer in a confused state that requires professional reset.

Assuming an aftermarket blank matches the OEM chip type

Aftermarket transponder blanks vary in chip compatibility, and an incorrect match will cut correctly but never communicate with the immobilizer.

Skipping a check of the reader coil around the ignition

A DIY key replacement that ignores a failing reader coil will keep failing no matter how correctly the new key is cut and programmed.

Underestimating how many attempts the immobilizer allows

Some vehicles only allow a small number of failed programming attempts in a set time window before requiring a cooldown period or dealer reset.

What Affects the Cost

Vehicle make and model chip type
Whether all keys are lost or a working key exists to program from
Blade cutting complexity for the vehicle
Mobile service location

Palmetto State Locksmith vs. DIY vs. Dealership

Comparison of Palmetto State Locksmith, DIY, and dealership/alternative options for Transponder Keys
Palmetto State Locksmith	DIY	Dealership / Alternative
Cutting and chip programming done together, on-site	Hardware stores cut the blade but can't program the chip	Handles both, but usually requires towing and an appointment
Typically more affordable than dealership rates	A blank that won't start the car isn't actually cheaper once you account for wasted attempts	Often the most expensive option for chip programming
Start test performed before we leave	No way to verify success without proper diagnostic equipment	Verified, but requires scheduling

How it works

1
Identify your chip type
We look up the chip requirement for your year, make, and model to confirm we have the right blank.
2
Key cutting
Blade cut precisely to your vehicle's original key profile.
3
Chip programming
Transponder chip programmed to communicate with your vehicle's immobilizer system.
4
Start test
Key used to start the vehicle and confirmed working before we finish.