Even more surprising: fobs that don't work if the key is in the ignition.
My 1996 Mustang had a bad battery, so it would barely start. I took the remote fob off the key ring and left the car running, but locked it (using the physical door-lock button). When I came back later, the fob would not open the door.
WTF? Had to have another key brought from home.
Another good one: If you open the back door of a Mini Clubman (or the regular Cooper, most likely) and then accidentally drop your fob into the car and close the rear doors or hatch... the car will re-lock itself and you're fucked. This is great when it's a hot day and you just put a dog in the car, which is in the sun. Now you get to break a window. Yay German engineering.
My 1996 Mustang had a bad battery, so it would barely start. I took the remote fob off the key ring and left the car running, but locked it (using the physical door-lock button). When I came back later, the fob would not open the door.
WTF? Had to have another key brought from home.
Another good one: If you open the back door of a Mini Clubman (or the regular Cooper, most likely) and then accidentally drop your fob into the car and close the rear doors or hatch... the car will re-lock itself and you're fucked. This is great when it's a hot day and you just put a dog in the car, which is in the sun. Now you get to break a window. Yay German engineering.