Question: how much does it cost to replace keyboard on macbook air?
Answer: If you take it to Apple, it'll likely cost you $125; they'll service it with new parts, and they'll give you an extended warranty on the repair itself; usually this is about 90 days in the U.S.. If you have the tools, you can get the same parts off eBay and do it yourself for about $16. Call it $20 with shipping.