Starlink-equipped Subaru Crosstrek models may experience a dead battery due to a parasitic draw, often traced back to the DCM (Data Communication Module).
Reviewed by SubaruReview Editorial Team · Last reviewed 2026-05-15 · Editorial standards
How this problem ranks against the other documented Crosstrek failures — cost, severity, and DIY difficulty at a glance.
| Problem | Years | Severity | Repair cost | DIY |
|---|---|---|---|---|
| Battery Drain / Parasitic Draw (this page) | 2015-2024 | Major | $400–$1,200 | 2/5 |
| Crosstrek Starlink Infotainment Random Reboot | 2018-2022 | Minor | $0–$950 | 2/5 |
This is one of several documented Crosstrek problems we track, and it fits inside the broader Reliability & Common Problems guide. If you're weighing repair against replacement, cross-check the Subaru repair-cost database and any open NHTSA recalls on your VIN before booking a shop.
Owners may find their Crosstrek with a completely dead battery, especially after the vehicle sits for an extended period (e.g., overnight or a few days). This parasitic draw occurs when an electrical component continues to consume power even when the vehicle is turned off, slowly draining the battery until it can no longer start the car.
The primary culprit is often the Data Communication Module (DCM), which is integral to the Starlink telematics system. A software glitch or an internal fault within the DCM can prevent it from entering a low-power "sleep" mode, leading to a constant draw on the battery even when the ignition is off. Other less common causes include aftermarket accessories, faulty relays, or a failing alternator diode.
The primary culprit is often the Data Communication Module (DCM), which is integral to the Starlink telematics system. A software glitch or an internal fault within the DCM can prevent it from entering a low-power "sleep" mode, leading to a constant draw on the battery even when the ignition is off. Other less common causes include aftermarket accessories, faulty relays, or a failing alternator diode.
National average $400–$1,200.
Difficulty 2/5. Diagnose and replace faulty Data Communication Module (DCM). Part number 86259FJ020 (or equivalent revision) often applies to affected models, but always verify with VIN.
Dead battery after sitting overnight or for a few days; Difficulty starting the vehicle; Battery warning light illumination (after jump start); Starlink system not functioning correctly
Owners typically pay $400–$1,200 at an independent Subaru shop, parts and labor included. Our Subaru Alternator Replacement Cost guide breaks the job down by parts, labor hours, and where the money actually goes.
The same generation also sees Crosstrek Starlink Infotainment Random Reboot. Both are documented with symptoms, cost, and a permanent-fix walkthrough — see the full list in the Crosstrek hub.
We rate it 2/5 on our DIY scale. Confident wrenchers can tackle it in a weekend using the permanent-fix steps above. Cross-reference the reliability & common problems hub for related jobs worth bundling while you're in there.
Dig into the Problems Database to plan your next maintenance sprint, or browse every model hub for buyer's guides, generation breakdowns, and known-issue lists.