Bottom case replace problem

Probably not - they carry different part numbers, the "Mid-2012" models have a single side mounted internal microphone whereas the "Mid-2013" models have dual side mounted internal microphones. The microphone setup is the only external design difference and it takes a sharp eye to notice.

Here at iFixit in the parts catalogue they are not listed as being compatible.

You might try contacting iFixit direct via the link at the bottom of the page... this is the volunteer DIY help forum (we are not iFixit employees).

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