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help ! new key acu issue bypass alarm

I

idgenie

New member
Hi hope someone can offer some advice, got a porsche boxster 2.3S 2004, manual, had it stored over the winter and the battery is flat, alarm was armed when the battery died. Managed to get into front boot eventually to get battery out, however there is a major issue i lost the key for the car :( and had to order a new one from porsche. Finally got the key and tried to put the new codes in to program the new key but we can't bypass the alarm and have now been advised we need a new ACU to get round this. This was the only key :((

Apparently the other option is buy a second hand acu with an ecu and key head (this would mean we would have 2 keys then) The cost for a new acu is around £280 + VAT, the second hand cost (i have found someone reputable who has chassis numbers and everything) is around £150

Is this really the case is there no way around this? also when we tried to program the key we hadn't charged the battery up would that affect anything?

If anyone can offer some advice asap that would be greatly appreciated

many thanks

 
Are you saying you have tried to enter the Porsche IPAS codes for the car using a PST2 or PIWIS tester? If so, and the codes don't work, then the ACU must have been changed at some point, most probably along with the DME. Alternatively, if you can access the DME programming, and the ACU has just died, then the simplest way would be to replace it with a new one.

The ACU and DME store the Immobiliser codes. An ACU can only be programmed with an Immobiliser Code ONCE - it cannot be changed afterwards. It makes no difference that you know the VIN of the donor ACU. Porsche are very unlikely to give you the IPAS codes for a VIN you don't own (in order to reprogram the DME to match). Also, if the DME has been changed, then you may not be able to program that either.

You would need to by a matching set of DME, ACU and keys from exactly the same model car, and even then you would never be able to program a new key for them.

HTH
 
You really need to find the original key - that should be much easier and less expensive than the alternatives - even if that means taking the house to bits to find it.

Did you ever have two keys?, if not then trace the previous owners and ask them if they have found the key to the car
 
Let me know what area you are in. Most of us Autolocksmiths will be able to read all codes out of the cars systems and re code keys for you. We can even re code a used ACU [;)] I should know someone near to you who can do it, or alternatively look on autolocksmiths.net
 
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