I'm looking online at dme chips. They are pretty cheap.. but the thing that I don't get is... if an m3 s50 dme is the same as a base 325 dme.. why do the m3 chips say will not fit 325/525? basically I guess a 506 chip wont work in a 413? is a 506 an EWS dme?
I have a 413 from a 93 325is. Should I just order one for a 325?
I have a 413 from a 93 325is. Should I just order one for a 325?

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