Just looking at Pelican, a new genuine Porsche water pump is about another $700, so $2k seems in the right ballpark if that's what they're using.
Owner reviews for water pump
I have no issues. Mines a 2017 with 86k miles (used to do only highway for 4 years).
Mines at 85k, no probs yet.
I'm currently sitting at 67k miles on my 2019 GLI without any issues. I'm pretty sure I won't have an issue by 80k miles.
My original water pump lasted 115,000 miles. I saw the fluid levels subside over the years, but never actual signs of a leak. Eventually, the leak became obvious enough to diagnose.
Melling and Aisin are both premium WPs. Airtex is pretty good. GMB is ok.
Someday, VAG will figure out how to make a water pump. *That day is not today.*
Waterpump and thermostat are common issue with Audi. I had a 2017 S3 and had it replaced around 65K miles, and now my 2019 S5 was replaced under warranty at approx 38/39k miles. The mechanic mentioned something along the lines, its made out of plastic.
My water pump and thermostat just went out on my ‘18 Allroad and was pleasantly surprised to find out that they were both under an extended warranty even though my car’s general warranty had expired last year.
My waterpump developed a crack 3 weeks ago and I started to leak coolant. Car had 20,000km on it. Had it all replaced under warranty. Was open about the mods on the car as well and dealership didn't give me any issues.
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