Thermostat OEM Volkswagen or Duralast

I had a bad thermostat and it's only indication was the temp rising when going up hills under sustained load.

I had this year ago, thermostat was stuck closed, so coolant couldnt go to big circle and into cooler, it went up after 10 minutes of highway driving up to 115° (obd temps) on dash it wasnt that much

I used the genuine part as there is no desire to redo it again too soon.

Duralast is ok. Does not have to be OEM. It will work just as good

It has been two weeks since the repair without issues, so I am going to call this one solved. If I was paying for this out of pocket in the future, I would only replace the thermostat and not the pump as that is what was closing and causing the issue.

Sounds like your water pump is working, but maybe your thermostat is stuck closed? Have you tested the thermostat?

Parts 03F-010-501-B Sensor 04E-121-113-G

Duralast thermostat? They are a piece of shit!

Original was stuck open, replaced with new VW which now appears to be stuck closed. ????. Fortunately I have recently acquired a new OE thermostat on clearance for jollies.

I warranty my shitty duralast thermostat (I hate duralast but when I gotta get to work the next day it works in a pinch it works) now after a 5 am swap I’m good to go