Xperia Z1 vibrating

[szbract]

I bought my Z1 2 months ago. I love it, it's the best. But in the Last 2 weeks the vibration isn't working fine. When I get notifications it's OK, but when I tap the keyboard or the buttons sometimes it doesn't working at all. And I have to wait or touch a button more times.
I tried to test it with the diagnostics, and every time I did, it worked fine. It's a hardware problem isn't it..
But I don't know what to do. Here in Hungary the service would say it's okey and no prob... Should I try it?
Has anyone the same problem?

[Sophia]

The small part in the picture is responsible for the vibrating of Xperia Z1. If the vibrating of your phone doesnt work fine, there maybe something wrong with this motor vibrator. You can tighten the connector of the vibrator with mother board, if it still not work fine, you can have a try to replace one.