Two problems related to horn assembly have been reported for the 2015 Subaru Outback. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Subaru Outback based on all problems reported for the 2015 Outback.
Horn became intermittent with failure related to steering wheel position, then failed altogether. No horn is a safety issue. We replaced the 'src set 83196ajo4', aka 'clockspring', the wiring assembly that connects the airbag as well as the horn, and all steering wheel controls.
Safety issue: car horn does not work (no sound) when driving straight ahead and steering wheel is straight. For horn to work I must turn the steering wheel either to the right to the 2:00 o'clock position and beyond or to the left to the 10:00 o'clock position and beyond.