"Just cut me a key" used to mean cutting a piece of metal. On most vehicles built in the last two decades, it means something closer to pairing a small radio to your car's computer — which is why not every key-cutting kiosk at a hardware store can actually help you anymore.
Transponder keys
A transponder key looks like an ordinary metal key but has a tiny chip embedded in the head. When you turn it in the ignition, the car's immobilizer reads a code from that chip — if it doesn't match, the engine won't start even if the metal cuts are correct. This is why a generic blank cut at a kiosk will open your door but never start your car: the mechanical cut and the electronic pairing are two separate jobs.
Key fobs (remotes)
A fob adds remote lock, unlock, and sometimes remote start or trunk release, communicating with your vehicle over a short-range radio signal. Some fobs still have a physical key blade for emergency entry and ignition backup; fully keyless "smart key" fobs work by proximity alone, with the vehicle sensing the fob is nearby.
Why this changes the price
- Basic transponder key: cut and programmed on site for most vehicles — the most common and least expensive job.
- Standard remote fob: requires the fob itself (which varies widely in cost by manufacturer) plus programming time.
- Proximity / smart key: the most expensive category, both for the hardware and because some vehicles require dealership-level programming access.
- Lost all keys: the most involved job — the locksmith may need to retrieve your vehicle's key code and, on newer vehicles, work around security systems designed specifically to prevent exactly this. Expect it to take longer and cost more than a spare-key job.
What to have ready when you call
Your vehicle's year, make, model and trim level. Two vehicles that look identical can use completely different key systems depending on trim or model year, and knowing this upfront means the locksmith brings the right blank and programming tool on the first visit instead of a second trip.