One problem related to engine overheat has been reported for the 2015 Audi A3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Audi A3 based on all problems reported for the 2015 A3.
At 5 months - engine almost overheated. Car towed to dealer where they found the fan and computer module failed and had to be replaced. At 7 months (current issue) - warning light came on and advised that brakes failed. Dealer found that the master brake cylinder failed. Internal camera showed seals failed and were leaking. This car is too new for such a major part to fail this way.