Replacing a key for an electric vehicle depends far more on the brand than on the fact that the car is electric. Many EVs from mainstream automakers use the same kind of proximity smart key as their gas-powered models, and those keys are replaced and programmed in much the same way. Other EVs lean on a phone app, an NFC key card or both, and adding new keys is handled largely through the vehicle's own menus and the manufacturer's account system. Knowing which type you have tells you where to go.

Not sure what your EV uses? Call (613) 707-4884 with the make, model and year.

The Three Kinds of EV "Key"

  • Proximity smart key (fob). The most common setup. The car detects the fob nearby so you can unlock by touching the handle and drive off with a start button or by simply selecting a gear. Like any smart key, it is programmed to the vehicle's immobilizer and keyless-entry system.
  • Phone as a key. The manufacturer's app turns your smartphone into a digital key, usually using Bluetooth so the car unlocks as you approach.
  • NFC key card. A thin card you tap on a reader on the car — typically a back-up for when the phone's battery is dead or it is lost.

Tesla is the best-known example of the phone-first approach. Its Model Y owner's manual describes the phone key as supporting automatic locking and unlocking, the key card as a back-up that is tapped against a reader on the driver's side door pillar, and the key fob as an optional accessory.

If Your EV Uses a Proximity Fob

For EVs that use a conventional smart key, the process is the same as for any push-button vehicle: identify the correct fob for your exact model, program it to the car with diagnostic equipment, cut the emergency blade if there is one, and remove any lost key from the vehicle's memory. Adding a key while you still have one working key is simpler than recovering from all keys lost. Our guide to push-to-start key replacement walks through each step.

If Your EV Uses a Phone Key or Key Card

Here the replacement is mostly an account and pairing task rather than a locksmith job. Tesla's manual, for example, explains that new key cards or fobs are paired from the touchscreen by scanning the new key and then scanning an already-paired key to confirm; that keys can be removed the same way; and that at least one key card or fob must always remain on the list. Replacement cards and fobs are sold through the manufacturer. If you lose your phone, sign in to the app on a new phone and remove the old phone key from the vehicle.

One practical Ottawa winter note: Tesla advises that a key fob should be at room temperature when it is being paired, so bring a new fob indoors to warm up first.

When Nothing Opens the Car

EVs still rely on a low-voltage battery, separate from the large drive battery, to run door locks, the keyless-entry receiver and the computers that recognise your key. If that low-voltage battery goes flat, the car may not respond to any key, phone or card — even though the drive battery is charged. In that case the fix is power, not a new key: consult the owner's manual for the jump-start or emergency access procedure, or contact the manufacturer's roadside assistance.

Protect Yourself Before a Key Goes Missing

  • Keep at least two physical back-ups — fobs or key cards — and store one at home.
  • Make sure the app account is in the owner's name and that you know the login.
  • Review the list of paired keys from time to time and delete any you don't recognise.
  • When selling the vehicle, remove your phone key and hand over every physical key.

Next Step

If your EV uses a proximity smart key and you need one added or replaced, see our smart key programming service. If you're not sure which system your vehicle uses, call (613) 707-4884 and we'll tell you honestly whether it's a locksmith job or one for the manufacturer.