Subaru Battery Keeps Draining - DCM Fix

My 2019 Subaru WRX started experiencing battery drain issues, and after some troubleshooting, the culprit turned out to be a faulty DCM (Data Communication Module) — a known problem on some Subarus. In this video, I walk through how to remove and replace the DCM unit, then test the car afterward to confirm the parasitic drain is gone and the issue is fixed. If you’re dealing with a dead battery, random no-starts, or unexplained drain, this is a common place to look. This is the unit I purchased from AutoHarnessHouse to replace the DCM: https://www.autoharnesshouse.com/6901... This is the TSB out by Subaru for the issue: https://static.nhtsa.gov/odi/tsbs/202... Straightforward diagnosis, hands-on repair, and real-world verification. Fixing the problem instead of just replacing batteries. 🔧🚗 #subaru #wrx #autorepair Chapters: 00:00 - Intro 00:36 - DCM Overview 01:17 - AutoHarness Starlink Bypass Plug 02:48 - DCM Bypass Plug Install 03:13 - Headunit Installed 03:30 - DCM Fuse Location 04:05 - Test Draw with Multimeter 04:58 - Start and Test 05:20 - Outro