Check out the realted link for some advice on how to reset the computer in your 2003 BMW 325I computer.
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Reset inspection light on 1989 bmw 325i
You need a scan tool to plug into OBD port
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The brake warning light on a 2005 BMW 325i can be reset by connecting an OBD II code reader. It can view and clear error codes detected by the computer.
idle control valve
this is a German car, there is no "reset" button,
Depending on the year there may be anywhere from 1 to 8 computers in a 325i
65L i believe
dexron3