I few days ago I bought a 2006 a4 2.0t and yesterday I took it to the carwash and after I finished and turn on the car my epc light came on. Drove it home and a few minutes later it turned off. So I went inside and I came out a few minutes later and I hear the fans turn on full blast!

Now I did some research checked my ecu cover and found that it was broken. From what I read is that usually happens when the relays get wet and get damaged. So I open it up and find water inside the box checked the relay and it was corroded. I just wanted to get a second opinion and make sure thats what was causing the car to turn on the fans full blast. Also is the relay next to it on the right the same exact relay? I think the numbers are 614. Just wanna know so I can order them at the same time.

And one more question I noticed some shaky vibrating metal sound and noticed the serp belt tensioner was shaky. Im reading that its normal but much is it suppose to vibrate