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    ECU swap?

    Can you swap a 173 ECU in to a car that originally came with a 153? will it have any ill-effects?

    #2
    yes you can IIRC. No known side effects.
    Continuous For Sale Thread
    323i s50

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      #3
      Works just fine, that's what I did.
      BimmerHeads
      Classic BMW Specialists
      Santa Clarita, CA

      www.BimmerHeads.com

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        #4
        173 ecu was the oem replacement for 153 ecus. You can also swap in 525 and 380, along with a couple less common ones as well.

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