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In the US, Nikon bodies have a one year warranty, Canada and Europe enjoy a two year warranty on Nikon bodies. Send it to APS, you'll get it back faster. I sent in two bodies and had them back in my hands in a week from shipping out.
Thank you guys for all your inputs. I have seen my D700 sensor has many dust once I shoot lens slow down and rubber part seems loose. I know it is easy to DIY for both.
I think i am not very clear in my OP. I wonder if Warranty covers it? I know lens has 5 years in US but how about body?
As for moving part, There might be not many moving but with long term usage, there is quite a bit parts benefit from checking like sensor plain could be mis aligned, shutter time could be off, AF module distance could change over the time etc..
Though nowdays, 95% percent of my photos is by using Manual lens. If need to pay more than $100 and wait long,(one week will be OK!) it may not worth it.