Just wanted to follow up. Took it the dealer. Later that day, they diagnosed the water pump failure, got my green light for repair under CPO warranty (with $50 deductible), and by the end of the same day the car was treated to a new thermostat/water pump. They recycled the coolant they drained and topped it off - a flush would have been extra. Service advisor said they pressure tested everything when I asked about the cap and everything passed. Let's hope this holds up!
Owner reviews for water pump
I had my timing belt done by not a Volvo specialist specifically, but a “European brand” mechanic. They used an Aisin pump / Gates belt kit and life is good.
When I was shopping around for cooling system replacement parts, I wasn't sure if GRAF or HEPU made a better metal-impellar water pump. I ended up purchasing both the GRAF and HEPU, and found the HEPU to have a better fit and finish compared to the GRAF.
My 2017 GTI SE also had a slight coolant smell but no visible leaks on the garage floor. When I brought it in for the 40K mile DSG transmission fluid service a couple of months ago, my dealer detected the leak from a defective water pump and replaced it under warranty.
I currently run an Ina water pump without problems for 6+ months.
i noticed that my coolant was a tiny bit low in early October. Well, when I took it in last Tuesday, November 24th, turns out that I needed a new water pump, and because there was a 5 year, 60,000 mile warranty, and 5 years had just passed, i had to pay ~$700 to have it fixed. so far so good after that, but I am going to write VWOA about it, because I was literally only about two weeks out of the 5 year warranty expiration.
I am now at about 55k and the water pump failed on it causing it to overheat. I learned that the 2015 gen 3 TDIs have a variable water pump that fails quite often causing overheating - just a matter of time.
The water pump on our 2019 GTI fully failed a couple of months ago (turns out what I've been smelling since we got the car new was likely a very slow drip of coolant leaking). Well within warranty, well under the mileage.
They replaced the water pump after it failed around 35k on my 2017 alltrack.
Failed on my 2016 after 1 year and 17K.
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