One problem related to engine clicking and tapping noises has been reported for the 2015 Subaru Legacy. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Subaru Legacy based on all problems reported for the 2015 Legacy.
May 8th 2015 we purchased our 2015 Subaru Legacy 2. 5i premium. #1. Very prominent coolant smell from passenger side engine area. Loosing coolant. #2. 600 miles- transmission/ ecu /throttle delay , a 3-5 sec delay in the response when going from (r) into (d) and the same 3-5 sec delay is duplicated when going from a stop to accelerating the car. Concerning. #3 3000 miles, loud wind noise is heard from all windows. Windows were replaced by dealer, but noise still exists. #4 the gas door will not release and continues to get stuck. #5 8,500 miles- excessive water entering into engine bay. While driving the engine bay gets completely soaked with water. Standing water in the battery tray, a river of water running down the inner fender walls inside the engine bay and water is entering into the fuse box. When engine gets wet it has a burning electrical smell. Water has also been found on the drivers side floorboard an in the spare tire area of trunk. #6 2,200 miles starting/motor concerns. The car will crank over, but doesn't start. The second attempt the car starts up and dies immediately. 3rd attempt car fires off an associated with bad gas smell/ rough running. The most recent time this happened to us (12/12/15), 1st attempt the car wouldn't start, 2nd time trying to start the car is fired up then died. 3rd attempt car started up running rough w/ a bad gas odor. It's associated w/ backfiring / popping sound through the exhaust. Recently has developed a low end sound/knock in motor between 1800 and 2200 rpms. #7 11,500 miles brake pedal goes to floor. Pedal isn't holding pressure. Vehicle pulls to the right an associated with a clunking sound coming from the right front wheel.