Send it in!
Sent in my K-5 Jan 2016 just a few weeks before the extended warranty ended. I also did the same some years ago for my K20D. The K20D did need service however during the extra two years.
Buying the extended warranty was a no brainer. At the higher price, think about it, then do it if you can. dSLRs are precision instruments. Don't fool yourself. They do fall out of spec. My K20D autofocus was off. Here is what Precision Camera did for my K-5. The camera gets hooked up to a very special computer than can perform all kinds of adjustments through the firmware AFAIK. I could tell they did clean it as the view finder was really clear, they cleaned the focus screen and sensor and exterior! Even though the warranty is more now
its still worth it. You get an extra two years of warranty (USA) and at the end send in your dSLR and get it back knowing its as good as the first day you bought it. You have to have some trust.
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