If you’re ever in a bind and can’t find your car key, there’s one option: replacing the door lock. But before you do, be sure to know how to do it. Here are four tips:

  1. Open the door of your car and remove the key fob from the ignition.
  2. Insert the new key into the lock and turn it on.
  3. Put your old key back in place and close the door; you’re done!
  4. If you have a remote keyless entry system, open your car’s door using that instead of your old key fob.