lol.

And yeah, we have the autolock feature, so it's even more dumb that they say it's a safety feature.

Anyways, hopefully it's the Fob and not the receiver, I'll do some messing around when my new style fob gets here Ordered.

 

The likelihood of your modern car key fob being able to unlock someone else's car is something like 1 in a billion or less. Key fobs don't just operate on frequency to unlock the cars, they actually send out a special 40-bit decoder key which operates like an RSA token and is randomly generates a new one every time you push the buttons on the fob and the car has detection logic built into it to match the key fob so that it only accepts codes that it expects to come from its key fobs. Range is not really a serious concern in regards to security of the key fobs unless your fob was able to broadcast to a radius of several miles.

 

Again my fob unlocks both my cars guess I have 2 of those billion. My mechanic said its a very common occurance

 

mine does the same thing it sucks...

i m thinking about replacing the battery maybe that might help

 

Time to buy some lottery tickets Krazy

 

It's pretty much almost impossible that the key fob came from the dealer that way. You or someone else probably programmed the cars to open for both of your key Fobs rather than them randomly coming into your possession in that way in the factory default state. It's possible to program a vehicle (or multiple vehicles) from the same manufacturer family to open with up to 3 (sometimes more) key fobs from that same manufacturer. You can't program a typical OEM key fob to open multiple cars though unless you have a fancy aftermarket key fob. You program the car, not the key fob.

That might sound confusing, but it's the way things work. Here is some clarification:

-Each key fob only does one thing.... sends out a logically hard-programmed randomly generated unlock code (hard programmed meaning the logic/formula is hard coded, but the code it generates is random according to said logic)
-Most cars can be programmed to respond to multiple different key fobs from the same vehicle manufacturer parent company (Nissan or Infiniti in our case).

 

Partyman, you have some knowledge here, do you think that I can change the output antenna in the remote without altering the signal?

 

There are How-To guides out there that tell you how to modify your key fob by opening it up, finding the antenna on the chip and soldering a wire loop to it. This essentially increases the antenna surface area by a magnitude of 8 to 20 times, depending on the size and gauge of the wire you use in your loop. Most people seem to say that you get an extra 30 or 40 feet of out a well implemented wire-loop antenna upgrade. Personally, I don't think I'd solder it on if I were doing it myself, or at least not on my first try until I'd proven that the concept actually worked by doing some field testing. You need to use a low wattage or adjustable wattage iron for such ventures so don't subject the board to too much heat and toast the whole thing or fry individual components. An adjustable 5-40 watt would work, or a static low wattage precision iron will be needed to minimize risk and get a clean bead that doesn't short out anything nearby. You could just try it first by wrapping the exposed end of your wire loop around the existing antenna and maybe taping it on with electrical tape or possibly even a dab of super-glue (gotta have a clean connection between the bare metal wires though for this to work, and the glue would just hold it there). Put it all back together and see if it works. If you got added range from it, then you could either leave it as is, or open it back up and then solder the connection in there so it's a permanent solution.

 

Same here, thinking about changing the battery to see if that would help.

 

Thanks bud, great suggestions!! I'm comfortable taking my 25 watt to it, I've done more precision stuff with it. I do need to get a variable one though for smaller stuff with a smaller tip. I just don't do it as much anymore.

 

OK!

So to my electronic guru people who have been posting here, I need your guidance.

Here's the key fob I got. Legitimate OEM Infiniti key fob.




Here's the internals:



Button side:




And here is what seems to be the transmitting coil:




You'll notice right away that this seems to be a quality key fob. Well done Infiniti. Wish you'd have done this on the old ones, silly people.


Here's the old one:




Now the thing I need to know is WHAT is the transmitter on the OLD one? My hope, is to take the nice sexy coil off the new-style one and install it on the Old POS. But I need to know where to connect it onto the old one.

 

Did u try programming the new fob to ur car. That would be the best option.

 

lol. completely different car. This is the newer style from the 2009+ models. If there's a way to make it work I'd be thrilled, but just as equally surprised. Not likely.

 

It should be programmable.

 

That looks like my "09" Maxima remote, but with a different logo. If that remote is like mine and has the keyless start feature, I doubt it could be programed. If it could (minus the keyless start, duh) be programed, that would be cool.
Could you update the receiver in the car to work with a matched newer remote?