[mikeash]

I got curious as to what the cost would be and ran some rough numbers. I think Tesla's labor rate is $125/hour. Figure their cost is half that. At 20 minutes per inspection, that's about $20. Multiply by 90,000 cars and that's about $1.8 million. 2014 revenue was about $3.2 billion and 2015 should be quite a bit higher, so "immaterial" does seem justified given that this involves nearly every car they've ever built.