One problem related to water pump has been reported for the 2015 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Audi A4 based on all problems reported for the 2015 A4.
Issue with poorly engineered water pump. My water pump went out due to a small plastic seal malfunctioning and allowing coolant to expel from system. I am fortunate I learned of the issue upon starting my car and could immediately take care of it, although leaving work at 9pm, long after everyone has left and with no automotive shops open made it difficult to take care of. Upon talking with an independent Audi/vw specialist and doing my own research I came to find this was an incredibly common problem. My car had only 35k miles on it and was 1 month out of warranty when this occurred. The Audi/vw shop says they replace 4-5 of these pumps per week! it clearly is a major issue, especially since a car cannot function and is dangerous to operate without the cooling system. I was very upset that the Audi brand would allow a known problem to continue, as it does not seem like a �luck of the draw� part malfunction.