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How to Replace the battery for 2010 Subaru Outback Key fob



Replace the battery for the key fobs on 2010 Subaru Outback Wagons.


This solution should be applicable for 2008-2010 Subaru Outback wagons.

Tools and Parts


Unlike some other cars, Subaru key fobs DO NOT need to be re-programmed after changing out the battery so it’s just a simply matter of disassembling the case and swapping out the battery.

  1. Keyfob case is held in place by a single Phillips screw. Using #1 Phillips screwdriver, remove it;
  2. Using a pry tool (or a sharp utility knife), gently insert into the slot and twist to separate the case. Please note that there is a small hinge by the rear ring so you will have to lift up at an angle from the key side;
  1. Using a pry tool, carefully lift each plastic hold-down tabs one at a time and rotate the casing; it’s a bit tricky to open all four tabs at the same time so take your time;
  2. Once all tabs are released, lift the casing from the controller board;
  1. Pop off the CR1620 battery and replace it with a new one;
  1. Reverse the installation process


CR1620 generally lasts around 3-5 years so you should not have to worry about it for some time.

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Good luck with your repair and let me know how it turns out!


Wednesday 12th of February 2020

Very helpful, just replaced the battery for my wife's car. Many thanks


Tuesday 17th of April 2018

Thanks for the guide! The screw from step #1 is old and partially stripped - do you know the size and/or part number for a replacement?


Thursday 19th of April 2018


those microscrews are hard to find. you can buy something like this one to find a replacement


Thursday 4th of May 2017

Unfortunatey my 2010 model has a screwed down casing on the inner controller board. Some very small philips screws. Thanks for the post.


Sunday 7th of May 2017

@ Hi Jason-

Thanks for letting me know. Were you able to replace the battery?

Peter Viles

Sunday 13th of November 2016

Should specify polarity of battery - Positive up or down?


Monday 14th of November 2016

@ Peter-

The "smooth" side is generally the positive side; if you look at the pictures, I showed you the exact position good luck