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Subaru Outback Key Fob Battery Replacement Guide
How to change a dead battery in the key fob remote control for a 6th generation 2015 to 2018 Subaru Outback.

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2017 Outback Key Fob
Back Side of Key Fob
Small Notch In Edge
This automotive maintenance tutorial was specifically written to assist owners of the sixth generation (2015, 2016, 2017, 2018 and possibly also the refreshed 2019 and 2020 model years) Subaru Outback wagon in changing a dead battery in the key fob remote control for the keyless entry system.

Owners of other Subaru vehicles such as the Forester, Impreza, Legacy, XV Crosstrek, WRX, BRZ, SVX, Tribeca, Exiga, Trezia, Levorg and Baja may also find these DIY instructions to be helpful.

The compatible replacement coin cell battery (also known as a "watch" or "button" battery) is part number CR1620.

It is available from various manufacturers such as Sony, Panasonic, Duracell, Energizer, Maxell and Phillips.

The only tool needed to access and replace the old key fob battery is either a small flathead screwdriver or a small automotive panel removal plastic pry bar tool.

Pry Apart Two Halves
Front Cover Removed
Pull Out Remote Unit
The first step is to separate the key ring and your house keys from the fob.

Then locate the small notch on the bottom right corner of the fob near the key ring loop and the red "Panic" button.

Insert a small flathead screwdriver into the opening and gently pry apart the two halves of the fob.

Lift the remote control unit out of the rear cover of the fob.

Plastic Retaining Clips
Four Retaining Clips
Top Right Clip
There are four retaining clips on the remote control unit.
Gently Pry Back Clips
Use Flathead Screwdriver
Separate Two Halves
Use a small flathead screwdriver or the tip of the small plastic pry bar tool to very gently pull back the loops on the plastic retaining clips.

Try to avoid bending or breaking the retaining clips.

Carefully pull apart the front half of the remote control and back cover.


Old Battery In Socket
Pry Out Old Battery
Old Battery Removed
Use the small flathead screwdriver to gently pry the old battery out of the socket.

The OEM battery was a Sony CR1620 3 volt.

Sony CR 1620 3 Volts
Insert New Battery
New Battery Installed
Orientate the new battery with the "+" positive side facing down and the blank "-" negative side facing up towards you.

Push a new CR1620 battery straight into the holder.

Line Up Rear Cover
Re-Assemble Remote Control
Re-Insert Remove Unit
Line up the rear cover of the remote control unit.

Gently push on the cover to secure the four retaining clips. You should feel or hear them "click" securely into place.

Re-insert the remote control unit into the front of the fob assembly with the buttons lined up with their corresponding holes.

Line Up Back Cover
Snap Together Key Fob
Test New Key Fob Battery
Line up the rear part of the fob case and gently snap it back into place.

Make sure that the two halves of the fob case are flush together at every edge.

To test the new battery, stand near your Outback and press the "Unlock" or "Lock" buttons.

If the new battery is working properly, you should see the parking lights flash and also hear the door locks opening or closing.

Be sure to record the key fob battery change in your vehicle's service records.

For more, please check out all of my 2015-2018 Subaru Outback DIY Repair & Maintenance Guides.

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