Subaru Outback rear hatch opens unexpectedly causing battery drain issue unresolved after multiple dealership visits on Subaru Outback

Some Subaru Outback owners report experiencing persistent issues with the rear hatch opening unexpectedly, which leads to battery drain and necessitates jump starts. This problem has specifically affected models like the 2016 Outback, where the electric system can drain the battery to failure. Despite informing dealerships through internal memos, Subaru has yet to provide a definitive solution to this ongoing issue. Owners have noted that a single open-close cycle of the hatch after the vehicle is turned off can result in a dead battery by the next morning, often accompanied by a warning beep. Attempts to mitigate the problem, such as the "carabiner trick," have proven ineffective for some, and the root cause appears to be a parasitic drain on the battery. Suggestions like removing the DCM fuse may help but could impact functionalities such as Starlink. Additionally, even with the engine off, a continuous electrical current to the rear gate actuator can contribute to the battery discharge when the power rear gate is left open for extended periods. This unresolved issue underscores the need for Subaru to develop a comprehensive solution for affected owners.