Replacing a macbook air 2016 I/O Board and Flex Cable I am trying to find a replacement part for my macbook air 2016 (model-A1466) I/O board and flex cable.
The cable has a part number printed on it:
821-1722-A
C-{4 digits which I can't remember}

I found a replacement part with the same product number, but the 4 digits on the second line are different. 

Does that matter or do I need an EXACT match?
According to this iFixit product page the part number for this part doesn't seem to include the C-XXXX portion as they only have 821-1722-A listed in the part number. I also find it useful to use their Identify your Mac feature when I'm looking for parts. Good luck!