3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
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where do you find the last three digits for your pcm I want to get a chip but I don't know where to find the last three numbers and what would be the best bang for the buck chip
if you do mean ECU then it's under the dash on the passenger side above the glove box. Just remove the plastic above the glove box and you'll find the ecu. The number will be on the underside of the ecu.
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