Chosen Solution

My Macbook Air (A1466) has lost functionality to the down arrow key, I am not sure if it is missing a part or can simply be snapped back in, It won’t actually snap in as the clear (white) bracket is on my desk. How do I get it back in? I don’t see a guide for this and every youtube video seems to reference a different model or other keys that are not the same as the arrow keys. In fact, the up key is also different than the down key mechanism having taken it off for reference. Thanks. Update (03/29/2017)

Hopefully this is a good reference. Should there be a mechanism (spring) on both sides or just one? Thanks.

If the key is no longer working when you press it, buying the plastic key will not restore functionality. You will need to replace the whole keyboard to resolve this. Two options;

  1. Replace just the keyboard, easier to mess something up https://www.youtube.com/watch?v=2PyhbiwU…
  2. Replace the palmrest where little can go wrong for a beginner MacBook Air 13" Mid 2013 Upper Case Replacement If the key is functioning when you press the rubber spring, you will just need the keycap and mechanism, which you can find on Google or eBay by Googling “a1466 key” and comparing to the layout of the original mechanism.