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I have found an ecu, codebox and a brown master key on ebay for a 155 2.0...

Iv read somewhere before that they are the same ecu's etc, is this correct and will it work in my 2.0 145?

If so...
How do I re-program my other keys from this brown master key which comes with the ecu and codebox?

Cheers
 

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If you have a plastic top engine then the answer is no. If you have an alloy top then the answer will be yes as long as the model of both ECU's are the same (i.e. both Bosch Motronic M2.10.3 or both Bosch Motronic M2.10.4). If that is the case then the ECU will be compatible but you will need to swap over the chip from your existing 145 ECU to the 155 ECU as the MAPS stored on that chip are different for the two cars.

You can find the procedure for programming new keys against the immobiliser in this document.
 
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