Surprise! iFixit says you can't do much to fix or upgrade the 2015 MacBook | Ars Technica
Core I5 1.6Ghz 4Gb Ram Logic Board for MacBook Air 13 Inch 2015 820 00165|Replacement Parts & Accessories| - AliExpress
Apple MacBook Air 13.3",1.6Ghz core i5 ,8GB RAM ,128GB SSD ,2015 ,MS OFFICE | eBay
Is there a way to upgrade the RAM in an early 2015 MacBook Pro without voiding the warranty? - Quora
MacBook Air 11" Early 2015 Teardown - iFixit
MacBook Air 13" Early 2015 SSD Replacement - iFixit Repair Guide
MacBook Air 13" (2015) - QWERTY - English (US) Core i5 - 1.6 GHz - SSD 128 GB - RAM 4GB | Back Market
I just bought a second hand macbook air 2015 11 inches (i5 4gb ram) and I'm shocked how well it runs for basic office writing and scientific data analysis use. : r/mac
Grade A: Refurbished Apple MacBook Air (2015) 13" Intel Core i5 1.6GHz 8GB RAM - Escapes.ie
How-To: Boost your Mac's speed and prolong its useful life with easy RAM upgrades - 9to5Mac
Apple MacBook Air (13-Inch, Early 2015) - Full Review and Benchmarks | Laptop Mag