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Toyota 4Runner Key Fob Battery Replacement Guide
How to change a dead battery in the key fob remote control of a 5th generation 2010 to 2016 Toyota 4Runner.

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2015 4Runner Key Fob
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Back Side of Key Fob
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Notch - Bottom Left

This automotive maintenance tutorial was specifically written to assist owners of the fifth generation (2010, 2011, 2012, 2013, 2014, 2015 & 2016) Toyota 4Runner SUV in changing a dead battery in the key fob remote control for the keyless entry system.

Owners of other Toyota, Lexus or Scion vehicles such as the Yaris, Corolla, Matrix, Prius, Camry, RAV4, Sienna, Tacoma, Tundra, FJ Cruiser, Venza, Highlander, Avalon, Sequoia, Land Cruiser, IS 250, ES 350, GS 350, tC, xB, xD, iQ and FR-S may also find these DIY instructions to be helpful.

A replacement coin cell (A.K.A. "button" or "watch") battery is part number CR2016 which is available from various manufacturers such as Panasonic, Sony, GE, Energizer, Duracell and Maxell.

The only tool needed to access and replace the key fob battery is a small flathead screwdriver.

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Insert Flathead Screwdriver
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Pry Off Back Cover
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Pull Out Remote Control
The first step is to separate the combination metal ignition key and key fob remote control from your other keys and the key ring.

Then locate the small notch on the bottom left of the key fob near the key loop.

Insert a small flathead screwdriver in to the notch and gently pry apart the rear cover of the key fob.

Lift the remote control unit out of the front part of the key fob housing.

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Gently Pry Back Cover
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Black Plastic Case
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Back Cover Removed
To access the battery socket, you'll need to gently pry off the black plastic rear cover from the remote control unit.

Gently pry back the edges of the black plastic cover from their retaining tabs.

You may need to re-insert the flathead screwdriver in several different spots to lift the remote control unit out of the black plastic housing.

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Gently Pry Out Old Battery
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Old Battery Removed
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Panasonic CR2016 3V
Either lift out the old battery with your finger nail or carefully pry it out with the flathead screwdriver.

Try to avoid damaging the metal electrical contacts with the screwdriver.



 

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Insert New CR2016 Battery
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New Battery Installed
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Pop On Black Plastic Cover
Lower a new CR2016 coin cell batter in to the holder with the "-" negative side facing down and the "+" positive side facing up towards you.

Make sure that the new battery is securely in the socket.

Line up the black plastic cover over the remote control unit.

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Remote Re-Assembled
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Lower Remote In Fob
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Remote Unit Replaced
Gently snap the black plastic cover on to the remote control unit.

Lower the remote control unit back in to the front part of the key fob housing.

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Line Up Key Fob Cover
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Snap Together Key Fob
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Test New Battery
Line up the rear cover of the key fob with the front part.

Gently push together the two halves of the key fob until they are flush against each other.

To test the new key fob battery, stand near your 4Runner and press the "Unlock" or "Lock" buttons.

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

For more, check out my other 2010-2016 Toyota 4Runner DIY Repair & Maintenance Guides.
 

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