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Thousands of Subaru drivers across the U.S. are reporting a frustrating issue: their batteries are dying overnight, and in many cases, they’re not being told why.
History Behind the Issue
The root of the problem lies in a faulty Data Communication Module (DCM), the system responsible for connecting Subaru vehicles to services like Starlink. Over time, the DCM’s internal memory can degrade, causing it to repeatedly wake up and attempt to communicate with cellular networks, even when the car is parked and turned off.
This constant activity draws enough power from the 12-volt battery to fully drain it, sometimes overnight. Owners across forums and Reddit threads have reported needing to jump-start their cars daily or replacing batteries multiple times within just a few years – sometimes with fewer than 20,000 miles on the clock.
Which Vehicles Are Affected
While Subaru has not issued a formal recall, the issue appears to affect a wide range of models equipped with Starlink systems and similar telematics hardware. This includes, but may not be limited to:
- 2016–2020 Subaru Outback
- 2016–2020 Subaru Legacy
- 2017–2020 Subaru Forester
- Certain Ascent, Crosstrek, and Impreza models
Subaru has acknowledged the issue and rolled out a warranty extension on the DCM to 8 years/100,000 miles for select vehicles, but many owners remain unaware.
What Owners Need to Do Next
If your Subaru’s battery keeps dying unexpectedly, especially if it’s less than 3 years old, you should:
- Check your vehicle’s eligibility for the DCM warranty extension
- Ask your dealer to inspect or replace the DCM under warranty
- Avoid repeated battery replacements without confirming the module has been addressed
- Consider installing a battery tender if the car is left parked for long periods
Subaru dealers may also disable the telematics system entirely if you’re no longer subscribed to Starlink.
How Subaru Drivers Can Take Back Control
If your Subaru is leaving you stranded and you’re not getting clear answers, you don’t have to accept repeated jump-starts and expensive battery swaps as normal.
Subaru may cover your repairs, and if they don’t, you may still have options. Many drivers have pursued claims under consumer protection laws when manufacturer solutions fall short. If your vehicle problems persist, it’s time to take back control.Call 833 Lemon Firm today and speak with a case analyst to find out if you qualify for free legal help.