One problem related to engine head gasket failure has been reported for the 2012 Subaru Outback. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Subaru Outback based on all problems reported for the 2012 Outback.
My well-maintained Subaru Outback limited with 102,773 miles overheated and blew a head gasket out of the blue. Just had the major 100k mile preventive maintenance done too. The extended warranty just expired at 100k and the dealer says it will be over $3k to repair. Apparently this is a common problem with Subarus that they have faulty head gaskets that fail between 80-120k miles. Very disappointed with Subaru quality with such a major issue at half life of my otherwise reliable vehicle!.