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Subaru Forester Key Fob Battery Replacement Guide
How to change a dead battery in the key fob remote control for a 4th generation 2014 to 2018 Subaru Forester SUV.

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2017 Forester Key Fob
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Back Side of Key Fob
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Small Notch On Side

This automotive maintenance tutorial was specifically written to assist owners of the fourth generation (2014, 2015, 2016, 2017 & 2018) Subaru Forester SUV in changing a dead battery in the key fob remote control for the keyless entry system.

Owners of other Subaru vehicles such as the Outback, 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 battery is either a small flathead screwdriver or a plastic pry bar tool.

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Pry Apart Two Halves
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Back Cover Removed
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Remove Remote Control
The first step is to separate the key fob from the key ring and your other keys.

Locate the small notch on the bottom right side of the fob housing near the "Panic" and the "Trunk Release" buttons.

To prevent from scratching the plastic surfaces, you can choose to either cover the tip of your screwdriver with a thin micro fiber cloth, or instead use a plastic pry bar tool.

Insert the blade of the screwdriver into the notch located between the two halves of the fob.

Gently pry apart the two halves of the fob to separate the rear cover from the fob housing.

Carefully lift the black plastic remote control unit out of the fob housing attached to the metal ignition key.

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Remote Control Unit
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Gently Pry Back Clips
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2nd Clip
There are four retaining clips on the remote control unit with one located at each corner.

Use the screwdriver or a plastic pry bar tool to very gently pull back the four retaining clips to release them.

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Release 3rd Clip
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4th & Final Clip
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Pull Apart Remote Control
Separate the rear cover of the remote control unit housing from the front half that has the exposed buttons.



 

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Battery In Rear Cover
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Pry Battery Out of Socket
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Old Battery Removed
The old battery is located in the back cover of the remote control unit.

Gently pry out the old battery from its socket with your fingernail or carefully use the flathead screwdriver.

Try to avoid bending or damaging the metal electrical contacts.

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Sony CR 1620 3 Volt
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"+" Side Down - Socket
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Push In New Battery
The OEM battery was a Sony CR1620 3 volts lithium cell that was made in Japan.

Push a new CR1620 battery down into the holder with the "+" positive side facing down and the "-" negative side facing up towards you.

You'll notice that the old battery was coated with a thin layer of grease. This is "dielectric grease" used to ensure a reliable electrical connection and prevent corrosion. You may choose to transfer some of this grease from the old battery to both sides of the new battery.

Make sure that the new battery is fully seated into the socket.

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Snap Together Remote
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Remote Re-Assembled
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Lower Remote In Fob Case
Line up the back cover with the remote control unit and gently snap them back together.

You should feel or hear the four retaining clips "click" back into place.

Lower the remote control unit into the front part of the key fob housing with the buttons facing down.

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Line Up Back Cover
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Pop Together Two Halves
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Test New Key Fob Battery
Line up the rear half of the fob housing with the front half and snap them back together.

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

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

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

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

For more, please check out all of my 2014-2018 Subaru Forester DIY Repair & Maintenance Guides.
 

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