Modern car keys are small computers. That's why a lost or dead fob is more involved than a house key, and why it pays to understand what you're dealing with.
How modern keys work
Most keys contain a transponder chip the car checks before it will start. Fobs add remote locking. Push-button start fobs let the car sense the key nearby. Any replacement has to be programmed to your vehicle.
Try this first
- Replace the fob battery.
- Check the owner's manual for a resync procedure.
- Try the spare fob to see whether the car or the fob is at fault.
What to have ready
- Make, model and year
- ID and proof of ownership
- Any working key you still have
Replacement on site
For many makes and models a locksmith can cut and program a new key or fob where the car is parked. Coverage varies by vehicle, so call with the details first. Transponder programming starts at $100.00 on the price list.
Get a spare now
Programming a spare while you still have one working fob costs far less than an all-keys-lost job later. See the automotive page.
