Bring it into KEH, they have a whole repair department with over 40yrs experience. Their repair quotes are also free and a ton faster then Nikon ever will be.
Nikon will do a free repair estimate if you send the defective lens to a factory repair facility. They may also offer a renewed and warranted version of the lens if the repairs are too expensive. I had the same lens and had them return it to me unrepaired. Good luck 👍
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