The code must be taken/copied when the driver locks the vehicle and walks away.
OK! I thought it worked only when the driver unlocked the car. Now it makes sense. Place the box near where the owner parks the car. When he parks it and locks the car, that code is stored. Now he (the thief) can use it to unlock the car.
That means the same codes are used to lock and unlock the car.
It would be cool if somebody set up a sting operation, and beat some of those thieves within an inch of their lives :naughty:
As far as Iâm concerned, thieves are human parasites, who do not contribute anything useful to society
Old fart i am I hate carrying a fob, so I use the key, on the rare times I hit the autolock button on the driver or passenger door. May be a minialist, 5 keys, crap I hate getting old, car key. garage key. house key. universal key for work, one key OI have no idea, oil change punch card and a usb stick for work computer emergencies.
It looks to me like all of the 2007 Lexus FOBs do have a key as a back up - similar to the one for my RAV4 w/push button ignition. If the battery in the FOB dies, you can still get into the car with the key and start the car up by touching the logo on the FOB to the ignition button.
Hereâs an example of a 2007 Lexus FOB -
No, Nevada, it doesnât work that way.
I explained the way it works. I donât understand it, but I explained the way it works. Weâre all smart guys here, but sometimes a new technology comes out the operation of which simply isnât readily discernable. This is one of those times.
I donât know on which page you explained it on. Rolling code is commonly used since the late 1990âs. You canât capture the next code when the vehicle leaves, it is likely the remote will be used again while the vehicle is away. The next code is blocked and captured simultaneously when the car is locked, then the criminal can use that code to unlock the vehicle.
Page one. I didnât realize the post had grown so much.
Iâm very familiar with rolling codes. Theyâve been in use for other applications for decades, including my garage door opener. Somehow, somebody has figured out a way around this. To the guy that did, the way around probably seems obvious.
Itâs possible that the algorithm used for automotive security locking systems is limited to a common series of standard progressions and whoever designed these things programs the chips to rapidly scan up & down through the standard progressions. For that to happen, the rolling codes could not be random⊠but if they were perhaps we wouldnât know them as ârolling codesâ. I really donât know all that much about this security technology.
Apologies if Iâm starting to sound defensive. Iâm starting to feel like my original statementâs veracity is being challenged.
Db, I agree with you. Iâm sure the companies that design these security systems and sell them to auto manufacturers must be looking into this. These types of problems tend to attract a lot of attention once they become public. Unfortunately, when the parasites get caught by the law they get let go immediately, but thankfully the industry itself is likely to be concerned.
The process is explained in Twin Turboâs link on page 5. I believe we had this same discussion 4 months ago.
Youâre right. Sorry I missed that page. Must have been visiting the restroom. 
Thanks TT.
mountainbike
But even if the thief is let go, he still has something on his record, correct?
When a thief uses a code-grabber to unlock a car and steal stuff . . . what kind of crime is that?
Car theft?
breaking and entering?
And would that be a felony or a misdemeanor?
I suppose one could argue that prison should be reserved for violent offenders, rather than these code-grabber type of thieves
But I wonât be the one making that argument 
And I do agree that there is not much incentive to NOT practice this despicable behaviour
I still canât understand how somebody has no pride, no desire to make something of himself
I canât understand why somebody is tempted to take something that doesnâtâ belong to him
Then again . . . some of my former and current colleagues had to be told by their supervisors that it was NOT okay to take something that doesnât belong to them. They also had to be told that it was NOT okay to raid the parts warehouse and take stuff home
Unbelievable that a grown man in his 40s or 50s needs to be told these things
it ought to be common knowledge, but I guess it isnât
BTW . . . with some of these guys, as soon as the supervisor went back into his office after that discussion, the guys headed straight to the warehouse, raided the shelves, and took the loot straight to their own cars 
If breaking and entry canât be charged, unlawful entry/burglary should be.
I didnât think this was a wide spread problem. rather a proven theory by another unemployed electronics wiz.
Yes theft is still theft, whether they break in or the door is open(ed). While not violent, they still need to be taken off the streets to protect the public, in my view. However, I thought that lock picks were illegal so isnât providing a code scanner also illegal?? Personally, Iâd take that guy off the street too.
Geeze, I came back to my computer and it was all locked up saying windows was updating. An hour later the dang thing had updated to Windows 10 all by itself. Iâve been saying no every time the message came up. What a bunch of jerks. Must be some very compelling reason why they want everyone upgraded. Heaven knows what I agreed to.
This is one reason I ALWAYS employ one more level of added âsecurityâ to the vehicles I care about. If I donât fully trust the factory âSystemâ and I like whatever Iâm driving more than usual ( Like my Porsche 914 and current GTi )âŠI go out n get me a few factory switches or push buttonsâŠone say for Fog lightsâŠwhen I donât have fog lightsâŠor an interior dimmer light that locks in the final position to hold the light on inside the cabin⊠and sometimes I use two or more in conjunction.
One of my favs was using the passenger or rear Seat belt clicker as another âKeyââŠcar wouldnât start if the seat belt wasnât clicked on the pass side or the back seat⊠I would usually go to the yard and clip off the seat belt âclipâ from the same vehicleâŠusing this as a âkeyâ⊠and leave that âkeyâ inside the car somewhere⊠Who would think of this during a theft attempt? NobodyâŠthatâs who⊠Even if they did think of itâŠthere are 4 possible seat belt clickersâŠand none work without a certain button on the dash engaged⊠LOL
I wire them to a relay or relaysâŠand just choose something to âKillâ within the list of items needed to run the engine. It is a simple and effective way to be sure your vehicle is not driven away by impromptu or otherwise thieves. I almost never kill the starter wire thoâŠleaving it active lends some level of âhopeâ to would be thieves⊠I kill something like fuel or spark or a sensorâŠbut leave the starter working⊠Psychological Warfare sortaâŠ
All the switches n relays in the world wont stop a Flatbed truck howeverâŠso this added layer of protection only goes so far. But it is effective in the conventional sense of preventing someone from starting your vehicle and letting someone drive off with it. Its even thwarted a car jacking attempt
Sometimes âLow-Tech-No-Techâ and even âRube-Techâ is the best way to foil âHigh Techâ LOL
Blackbird
Just checked with wife. There is s key. Thereâs a little slot on underside of handle to unlock door. Maybe if she lets me drive it more Iâd know.
Db, most of these crooks already have records. Many donât care. Many consider it a badge of honor. Very few actually care.
Nevada_545: That is exactly what I read about a couple of years ago. I use the armrest button to lock my car. My keys/fob are in my pocket when I walk away.
I thought that lock picks were illegal
Iâm not so sure, I bought sets of them right off the Matco tool truck.
PvtPublic: And you can buy âslim jimsâ used to open locked vehicles at the hardware store.
I remember several years ago, there was a car magazine . . . âeuropean carâ, I believe . . . that had a very nice and detailed write-up about some kind of a highly modified Porsche
Soon after, the magazine reported that somebody had shown up with a flatbed and simply made off with the entire car 
I believe the car was named after a computer game . . . perhaps âDoomâ or âQuakeâ :naughty:
So by naming those, you know it happened a REALLY long time ago