iFixit has completed a full teardown of the 2013 MacBook Air and overall, nothing major internally has changed compared to 2012 models aside from the following:

• Smaller SSD module
• Updated AirPort card,
• Samsung flash controller
• New heat sink clamp
• Opposite-facing speaker cable connector
• Larger 7.6 V, 7150 mAh battery (2012: 7.3 V, 6700 mAh)

The iFixit team notes in order for Apple to boost the speed of its flash storage by “up to 45%”, the company implemented the following, via Samsung:

• Samsung S4LN053X01-8030 (ARM) flash controller
• 8 x Samsung K9LDGY8SIC-XCK0 16 GB flash storage
• Samsung K4P2G324ED-FGC2 512 MB RAM (on the SSD!)

On the outside, everything is mostly the same including the model number (A1466) but the addition of two ports on the left side to accommodate new dual microphones.

The repairability scale scored the same as the 2012 Air, coming in at 4 out of 10. Below is a full video overview of the teardown: