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Bosch Motronic 5.2 ECU replacement

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Hi ,

I am driving  a 1999 Boxster 2.5 and the Bosch Motronic 5.2  ECU has suffered water damage. Are these ECU`s individually  programmed to work with a specific Vin no. only  or can I buy a secondhand one from the shelf for my car. 

Any suggestions whom I  may contact to purchase  a secondhand replacement  ECU  ?



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A used ECU won't work on its own.  The DME (ECU) and Alarm Control Unit are both programmed with the immobiliser code, and if they don't match then the car won't start.

You can change them as a set of DME, ACU, and Key(s) but it has its downsides.  Unless you have the security codes from the donor set (impossible to get) you will never be able to code a new key.  The proper way to do it is have a new DME fitted and programmed to the car.  The trouble is, a genuine 5.2.2 DME is now so expensive (£5000+) it might well be more than the value of the car.

I would suggest contacting someone like bba-reman.com and see if they can repair it.

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