Discovery 2 button key fob programming

[unstable load]

I need another immobiliser circuit board for my Disco because mine is a tad tired and I would like a spare, so, can I buy another off flea-bay and get it successfully reprogrammed or must I buy a new one?

[Mobi]

You can get them programmed in with a nanocom using the number in the key on the circuit board or with a hawkeye, but will need the barcode on the tag with a new key. Other code readers will do it but don't know which ones.

[JordanTurbo]

You do not need a brand new key, a second hand key will work fine (with a new cut blade obviously).

You are telling the BCU which keys to trust, not pairing the key with the car. In theory you could set up one key to work with several different vehicles at the same time.

[unstable load]

"You do not need a brand new key, a second hand key will work fine (with a new cut blade obviously).

You are telling the BCU which keys to trust, not pairing the key with the car. In theory you could set up one key to work with several different vehicles at the same time."

OK, I understand that, but can my BCU be told to trust 2 different codes is my question?
My other key will be off a wreck, so is "trusted" by another BCU, but obviously not by mine and that is what I need to change.
I have a new key fob with the blade already cut, all I need is the electrickery gubbins that go inside it and to get them trusted by my BCU......

How do I achieve that?

[JordanTurbo]

unstable load said:

OK, I understand that, but can my BCU be told to trust 2 different codes is my question?

Yes. Every key has a separate code and the BCU can remember 4 at one time.

unstable load said:

My other key will be off a wreck, so is "trusted" by another BCU, but obviously not by mine and that is what I need to change.

That is correct, and even after you have matched the key to your discovery, it will still work with the vehicle it came from. The keys hold no vehicle data.

unstable load said:

The
I have a new key fob with the blade already cut, all I need is the electrickery gubbins that go inside it and to get them trusted by my BCU......

How do I achieve that?

When you get the new internals for your empty key it should have a 6 character code on the chip. If you can find someone with a Nanocom system, this will be enough to match it. Other systems like Hawkeye require the full long code that normally only comes with new keys from Land Rover.

You will also need to open your current key and note down it's code so that you know which "slot" you don't want to overwrite. Otherwise the BCU will forget the original.

Once you have got both keys working I strongly advise you get the Emergancy Key Access (EKA) code, if you don't already have it. Nanocom can retrieve it from the BCU or a dealer will provide it for free with proof of ownership. It's a 4 part sequence that can be entered manually in the drivers door lock to switch the immobiliser off in the event your remote locking fails for any reason and you don't have access to the spare fob.

Edited by JordanTurbo on Tuesday 6th January 23:58

[unstable load]

Thanks a lot for the responses. Much appreciated.