Reprogram Your Keys
One benefit of electronic keys is that you can reprogram them, which negates the need to change the locks on your car. Take this step after you buy the car to make sure no one who might have a spare key can use it.
For security reasons, vehicle manufacturers only license the software for reprogramming key fobs to dealerships and locksmiths. The dealership or locksmith will ask you to show proof of ownership and registration, and will need access to your vehicle and key fobs simultaneously. Depending on the type of car you drive, a specialist will use one of two forms of key programming, either OBD2 or EEPROM, to create a new “password” frequency between your key fob and car. Though this process only takes a few minutes, it can cost between $200 to 400 per key fob.2
If you suspect that your key fob has been hacked, you can reprogram your keys to ensure anyone who captured their signal can’t use them. Considering the cost of reprogramming, though, it’s much more affordable to keep your keys in Faraday bags in the first place. Keep track of the whereabouts of your key fobs, and go to your dealership or a locksmith to deactivate any lost or stolen ones.