Basic metal key
Older vehicles, generally before the late 1990s, often use a plain metal key with no chip. These only need to be cut, not programmed.
Transponder key
Looks like a regular key with a thicker plastic head. Inside the head is a small chip. The car reads the chip, and the engine won't stay running without the right one. These need to be cut and programmed.
Remote head key
The key blade and the lock/unlock buttons are built into one head. Both the chip and the remote buttons need to be programmed to the car.
Flip key
The blade folds into the fob and flips out with a button. Common on many American, Korean and European cars. Worn flip mechanisms and cracked shells can often be replaced without replacing the electronics.
Smart key (proximity fob, push-to-start)
You keep it in your pocket or bag, and the car detects it when you touch the handle or press the start button. Most smart keys also hide an emergency metal blade inside for when the battery dies.
Laser-cut (high-security) blades
Instead of notches on the edge, these blades have a wavy groove cut into the side. They need a special key machine to cut, which a mobile automotive locksmith carries in the van.
Tips that save money
- Keep at least two working keys. Adding a spare costs much less than a lost-all-keys job.
- If buttons stop working, try a new battery before assuming the fob is dead.
- A cracked shell can often be replaced while keeping the original electronics.
- Buying a fob online? Check the part number and frequency match your car before paying.
Need a hand?
Doctor Locksmith is a mobile locksmith serving all of Dallas–Fort Worth. Call (469) 444-9993, 24/7, and we'll quote the price before we come out.
