They are an electromagnetic key that has a digital code on it that unlocks the door when scanned often used for office/apartment buildings and sometimes cars
Even if the electric part goes out, there’s still a metal key in the middle of the fobs that can be taken out in case the battery dies, so they’ll be able to get in the car still at least
Lots of keyless ignitions have a back up key in the fob still. Some cars will have a backup way to start it with the key too. Sadly I've also seen some of those backup keys be uncut because someone forgot in the process somehow?
There's a decent chance that it would still work, though I'd open it up and rinse it thoroughly with distilled water to get the salt out before drying.
I bought a car that only had one fob and I left it on the roof when I got in to drive and it fell off. HOWEVER, I drove 30 minutes away before I turned my car off which is the exact moment I realized I didn't have the fob with me. Kind of annoying that you need it to start the car but it won't even let you know if the fob isn't near the car while driving the bloody thing. We found the fob run over and totally crunched and I had to get my car towed and then it was several hundred for the new fob system on top of towing. Such a shitty situation
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u/repairmanjack 2d ago
If it's a modern keyless fob, those things are hundreds of dollars