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Discussion Starter · #1 ·
I've just replaced the ecu on my 2008 astra h because of damage, but now when I try to program my key using opcom it just keeps saying programming failed. Does any one have any idea if I'm missing something or doing something wrong! Also thought its worth mentioning that the drop down box we're the mechanical key number should go is blank and I've no idea what should be in there!
 

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A.O.N - Approved Vauxhall Specialist (Anthony)
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If you just replaced the ECU, there shouldn't be any need to reprogram the keys as they are programmed to the CIM.

Is the key you are trying to program a new or second hand (previously programmed) one?

The mechanical key number is on your car pass card, and starts with a letter, then four numbers.
 

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Discussion Starter · #3 ·
The CIM was originally replaced but since then I found that the ecu was damaged! The key body is new an I've had the blade replace and swapped the internals from the original key! I don't have the mechanical key number as there is no pass card! I do have the original security code, the security code for the CIM donor car and the pass card for the donor ecu!
 

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A.O.N - Approved Vauxhall Specialist (Anthony)
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If you have replaced the CIM with a second hand one, this is why you cannot program your keys to it.

Keys can only be programmed once, unless you buy a new blank CIM from Vauxhall which can accept keys that have been programmed previously.

So your options are to either replace both keys, or get a new CIM.
 

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Discussion Starter · #6 ·
Sorry to ask again, there's loads of spare keys on eBay that all say in the description that they are spares but are used an that they just need programming an cutting? Is this a false statement or is it right that these ones can be re-programmed? Thanks for the help
 

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A.O.N - Approved Vauxhall Specialist (Anthony)
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Sorry to ask again, there's loads of spare keys on eBay that all say in the description that they are spares but are used an that they just need programming an cutting? Is this a false statement or is it right that these ones can be re-programmed? Thanks for the help
You will have to clarify with the seller - if they are the spare key from another car, and it has been programmed to it (even if it hasn't been used to open or start the car) then the key is useless to you.

If it's never been programmed, then you should be OK.
 

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Discussion Starter · #8 ·
Found one that's never been programmed but the rest I've looked at have all been spare keys that have been programmed to there respected car but never used!
 

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Discussion Starter · #10 ·
Unfortunately I don't know the mechanical key number but I suppose I could swap the blade from my key an code it myself with opcom! Would I need to change the pick up ring around the ignition barrel an could I still code the key without the MKN?
 

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A.O.N - Approved Vauxhall Specialist (Anthony)
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Unfortunately I don't know the mechanical key number but I suppose I could swap the blade from my key an code it myself with opcom! Would I need to change the pick up ring around the ignition barrel an could I still code the key without the MKN?
No need to change the pick up ring, and there should be no need to change the MKN.

The blade is easy to swap on the flip keys - there is a small roll pin to knock through and the blade comes out.
 
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