I had mine done on my 2018 S4 from an Audi dealer in PA. Cost me $3,928 total. They replaced the water pump and hoses, coolant regulating valve, vacuum control valves and lines, and the serpentine valve. The water pump is what failed and took everything else with it.
I brought in my 2019 Audi A7 for an alternator recall. The car has 40k miles on it. While the car was in they found the water pump was leaking and said they replaced it under warranty along with the alternator.
Audi doesn't have the best record with water pumps and housings. On the 8V S3, the pump would start to leak, but it would drip onto the splash guard and never make it to the ground. The only signs were coolant smell and frequently needing to top off the coolant.
2017 Q7 3.0T. Steadily using more oil over life of car. Now a quart every 350 miles. It doesnt have the power it used too. $1500 for a new water pump at 54,000 miles.
The only issue I’ve had with Audi over about 200k miles split between an 87 cs turbo Quattro and a 15 a5 cabrio is they each needed a water pump around 90k
Water pump went out on two of mine around 100k.
My b9 has had 0 problems except water pump, 110k
Carbon cleaning, water pump replacement, possibly turbo replacement, timing chain, and dsg service are large ones over 100k miles. Those are issues I've had with my a3 with the 2.0t with over 138k miles.
Currently own a ‘15 S3 with 130k+ miles. Nothing really major to report for me outside of some known common issues with this generation (water pump, PODS, etc). Car has been great and honestly easy to maintain if you can DIY oil changes, brakes, and DSG fluid changes.
To answer the second question, bro, this happens to every Audi owner. Like it’s extremely common for water pumps to fail, mine is In the shop to get a new water pump, and my guys noticed there was 2 small oil leaks.
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