dead battery in subaru outback when it sits for more than 24 hours

Asked by MommawSubie Apr 28, 2020 at 12:08 PM about the 2017 Subaru Outback 2.5i AWD

Question type: Maintenance & Repair

Dead battery in subaru outback when it sits for more than 24 hours.  At
dealership the battery tests out ok.

4 Answers

F_O_R answered 4 years ago

Classic Subaru el cheapo battery problem. Buy a quality battery like Optima or Interstate with the highest capacity you can fit in the car.

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TheSubaruGuruBoston answered 4 years ago

Yup. Big Interstate at COSTCO for $80 is a winner. I have to put one in half the 2016-2018 Subies I buy.

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Zhivko answered 4 years ago

Check out this post: https://www.cargurus.com/Cars/Discussion-c23420_ds987294 Have similar issue with my 2017 legacy. If new testers tell u the battery is good, then it is definitely good. Don't be listening to people tell u your battery is cheap. The cheapest battery should last u at least from winter to winter. I have done some testing myself and found one of the problems. Under the hood there is a 7.5A fuse (DCM) that when unplugged it stops draining the battery. See the attached.

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Zhivko answered 4 years ago

Here's the video on youtube https://youtu.be/UPBxswjdH3w

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