Car opened while parked up.

So do I. But can find a use for both. More if I had the space. ;-)

My car in question has all the remotes and keys it came with when new. But without the key/remote you couldn't start it anyway due to the immobiliser.

In message , Harry Bloomfield writes

Thats not quite true - the report does not mention rolling codes, it seems to indicate a static one. Furthermore, it requires possession of the fob for quite a while, to interogate the fob by wireless until it gives up the code. As the article says, its best used by a car valet parker - who can interogate the key whilst you are eating, it seems unlikely that this technique would be any use on a fleeting target as they approach their car.

That's why you need to interrogate it repeatedly, sao you can predict the next code

Which is the relevant bit

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Paul saying something like:

My Tranny does that, but the double-clunk sounds different when it's re-opened the locks. I can imagine that many might not notice.

In message , Paul writes

Nope, it specifically mentions Microchip Keeloq which is rolling code system.

To enable him to crack *any* other key from the same make/model in seconds.

It takes hours to extract enough information from a *sample* of the key in use to enable him to crack any other key from the same model of car in seconds so if an attacker was determined to use this attack, they'd go and rent or buy a car, crack that car's key and then they'd have enough information to make cracking all the rest of the same model a matter of seconds.

Any more questions?

I had exactly the same problem on my '03 320d (i.e. car found mysteriously unlocked when definitely left locked), and more commonly found just the boot unlocked. It plagued me for months....and I found the cause...

It was my keys. Because of the way the BMW key fob is designed, the unlock buttons (for doors or boot) were being pressed by adjacent keys on the keyring whilst in my trouser pocket, opening the car from within the house.

The day I found it I had just locked the car and was standing on my front doorstep talking to my neighbour. We finished and he went inside. I then lifted my leg to step over the threshold and I heard the car unlock. I took out my keys, re-locked it and put my keys back in my pocket..stepped over the threshold and it happened again.

Once I realised this I rearranged the order of the keys on my keyring and also turned the BMW key to face the other way round on the keyring. Once I worked it out and sorted it it has never happened again for 3 years since. Ta daah!

Good luck

Not the case here, I'm afraid. The first thing I do when getting indoors is to hang up the keys. And I've never had it happen when I've been out visiting etc where I'd keep the keys in my pocket.