Handwritten numbers on the turbo?

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Sep 23, 2020
Hi all,
I own a 2017 A3 e-tron in the United States. I am the third owner.
I noticed some handwritten markings on the body of the turbo and that seemed very strange and unprofessional to me. In the US, you can go to junkyards and get used parts and the junkyard marks the part with a number with bright permanent marker. This looks the same. I highly doubt it (since the car has had no accidents and has only 33k miles) but perhaps the turbo blew and someone replaced it with a used one from a junkyard...
Unless you guys see the same with your cars?

Appreciate you checking.
This is what I see on my '17 e-tron:

Has some numbers/letters marked in what looks to be green marker pen...
Excellent; that looks just like mine.

I believe this was intended.

Looks very un-German to me but if you see it as well, then it should be OEM.

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