I have a 2016 A6 2.0T w/52K on the clock now and it's been reliable thus far, although I did have to replace a water pump at 17K.
Had my water pump replaced around 50,000 miles in my 2017 A4 2.0t. Other than that, the car has been rock solid.
At 52k miles, it appears the water pump went out on our 2015 Audi A3 1.8 T FSI. It has been drinking coolant the last few months and leaving the garage smelling like anti-freeze... the coolant leak is visible beneath the airbox/battery area.
Waterpump failure at 26k factory installed (plastic impeller, bearing)
I wasnt planning on changing mine either when i bought my Audi TT and it had 61k miles on it and was just going to change belt and then at 100k the pump+belt.. when i took the pump off to see if it was plastic impeller style the impeller wasnt even attached to the pump.. it was just free spinning on the shaft.. i to this day have no clue how the car never overheated before that day.. cause i drove the car 2600 miles in 9 days prior to doing the timing belt. ill dig up the link but i posted a link on here of a movie how i could flick the impeller and it spun like 6 revolutions on the shaft without the actual shaft moving...
the aux water pump is leaking you can do it without taking the intake manifold off thru the driver side rear if the engine shouldnt cost you more than 200 when your all done
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:
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