81–90 of 102 posts
What's stopping people from physically inserting the key into the lock/ignition?
Cars not having physical locks on doors or for ignitions anymore is one, I assume.
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Does such car exist? (Tesla Maybe?)
my 6 year old nissan doesn't have a physical key. most keyless cars you can open the door but not start the engine without a functioning wireless key
The fob also has a physical key hidden inside - although that's a bit more obvious as there is a key hole on the drivers door.
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It's not that uncommon actually. Even at my car dealership this is a common problem. A couple hundred cars with the same keyless entry system parked in the same lot. All those cars are actively scanning for their key fob, which causes all sorts of RF collisions. I've gotten used to having to use my physical key when picking up my car at the dealership.
the cars are transmitting? are you quite sure?
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It's not that uncommon actually. Even at my car dealership this is a common problem. A couple hundred cars with the same keyless entry system parked in the same lot. All those cars are actively scanning for their key fob, which causes all sorts of RF collisions. I've gotten used to having to use my physical key when picking up my car at the dealership.
What brand of cars are these? It's not an issue in any car park I've been to.
There is nothing 'mysterious' about this, this is just how radios work. Neither does it have to be malicious. Most car key fobs work in the 433MHz range, if there is something in the area transmitting at said frequency, it will cause the relatively weak signals from keys fobs to be blocked. This it why we have electromechanical compatibility (EMC) certification for any electrical devices being sold. With the market b…
I believe you meant eletromagnetic compatibility (EMC).
> "I thought it was some kind of alien phenomena." Any sufficiently advanced technology is indistinguishable from magic. For some (a lot?) of people, keyless entry seems still to be an advanced technology.
I have an EE degree and I firmly consider even the simplest forms of radio communication insane magic.
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A lot of them actually have a real key "hidden" within the digital fob, see example: https://www.bimmer-tech.net/blog/item/105-about-bmw-key-fob I have never had to actually use it, but looked into it when I got low battery-warnings to make sure I would not be locked out. Assuming this is not a legal requirement I am sure there are models where this is not possible though.
those are for opening the doors but you cannot use them to start the engine
Other cars probably have other solution. It was possible in my case as well (not BMW) but do not remember the process.
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maybe they bring out the huge car sized faraday cage
If you build a structure out of supermarket trolleys around the car, would that be sufficient? I love the idea of a car size foldable Faraday cage btw.
There's a good chance a cage made out of shopping carts would block HF and below quite effectively. UHF and microwave will go straight through it though. Any holes need to be significantly smaller than the wavelength.
It'll be someone using a 'jam, listen, and replay' device to unlock and start keyless cars so they can drive them to a port and steal them. Pretty much every week a car is stolen this way from my street. I now always take the engine management fuse out of the fusebox when parking my car so at least the car can't start when a thief pulls this... They tried anyway though!
Where do you live that a car gets stolen from your street every week?