Water pump OEM FORD or OEM Audi

from 88k to 150k miles, I put in a new water pump ($27). otherwise very reliable and easy to find parts as there are tons of them in the junkyards.

Had the dealer do the water pump on my 09 A6 3.0t and it was like $1800 for that alone.

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.

Waterpump failure at 26k factory installed (plastic impeller, bearing)

Not true. The maintenance schedule for the belt is 105,000 miles. Many of the pumps with plastic impellers fail before that. The plastic composite seems to age and become brittle after 70k or 80k miles--some sooner and some later. But they do fail. This is what happens: