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Added that, the profiles or “shapes” of key is different for different manufacturers of vehicles, eg a subaru key wont insert into a toyota lock, and also added onto that, there is a chip with memory hidden in the handle of the key that is programmed to its exclusive car so if for any reason a random key does turn in the ignition in your ...
First off, most cars you see on the road have a chip key. The ones that come to mind that don't are Kia and some Hyundai. My '98 ford has a chip key. The chip inside the key is called a transponder. It sends and receives a signal to your cars immobilizer through the antenna in the ignition allowing you to turn on the car.
A lot of "modern" (like, as far back as the 90s and up for some cars) keys have a RFID chip in them or a simple resistor. It may not look like the key has electronics in it but if it has a plastic head, it may be hiding some small electronic component. A RFID chipped key for my Mustang or my 2012 Silverado cost $40 at my local locksmith.
SnooCapers9823. •. No. Let's begin with the basics: Step 1: the manufacturer pairs your car with your key, and only the car and the key know the "counter" and code generation algorithm. Step 2: When you press your car unlock button, the key generates the code with the paired algorithm and uses the counter to know the count :D.
Most older keys were 40 bit and newer ones (ford at least) were 80 bit. I get the idea that the car would sent the key a number, then the key would spit out another number based on the encryption key, but the actual key was never transmitted. the $100 bypass kits we used had enough processing power to decode the 40 bit keys, but the 80 bit keys ...
Lol. Any hardware store will have a key copying machine. Lowe’s, Home Depot, the works. The name brand stores will even make chip keys for newer cars. In addition to copying your remaining key, you could go to a dealership and have them create a perfect new master key with the key code.
Typically, if you have 2 keys with active chips (some cars might only require 1 active key to program), you can program a third or a fourth yourself with the help of the interwebs. You'd still have to order the key with the chip online at about $50-$70 per key, but it's much cheaper than the $200-$300 that the dealerships charge.
Hyundai is the last carmaker I can think of who still offers non-transponder keys on their cars. You can get the transponder key for a cost, of course. Many car companies still offer physical keys, but you're stuck with the anti-theft & keyless systems and sometimes they're "mandatory options". To tell you the truth, I don't see why you would ...
Hmm, some cars have door chip sensors too. Unlocking and opening the door without a chipped key can set off your car alarm. OTOH if your key is locked inside, better to set off the alarm, get your key and shut the alarm up than not get in at all.
A place to discuss and/or post pictures of classic cars, trucks, or bikes; including hot rods, car shows and auto museums. Note - this is not for classifieds. Posts selling vehicles or vehicle parts will be removed.