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Toyota Camry Key Fob Battery Replacement Guide
How to change a weak or dead battery in the smart key fob for an 8th generation 2018 to 2022 Toyota Camry.

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2018 Camry Key Fob
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Back Side of Smart Fob
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Notch Bottom Corner
This automotive maintenance tutorial was specifically written to assist owners of the XV70 eighth generation (2018, 2019 and probably also the 2020, 2021 & 2022 model years) Toyota Camry sedan in changing a weak or dead battery in the intelligent or "smart" key fob remote control for the keyless entry and push button start systems.

Owners of other Toyota, Scion and Lexus vehicles such as the Avalon, Corolla, Prius, Yaris, Mirai, 86, Sienna, RAV4, Highlander, 4Runner, C-HR, Land Cruiser, Sequoia, Tacoma, Tundra, Venza, Hilux, RX 350, IS 250, IS 350, CT 200H, GS 450h, GX 470, LX 470, UX 200, NX 300 and UX 250h may also find these DIY instructions to be helpful.

The compatible replacement coin cell (also known as a "button" or "watch") battery part number is CR2032 which is available from manufacturers such as Panasonic, GE, Energizer, Sony and Maxell.

The only tool needed to access and replace the battery is a small flathead screwdriver or a small plastic pry bar tool.



 

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Insert Screwdriver
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Pry Off Rear Cover
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Red Plastic Battery Cap
The first step is to separate your key ring and other keys from the fob.

Then turn over the fob and locate the small notch at the bottom corner near the silver key ring loop.

To prevent from scratching the plastic surfaces, you may 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 your screwdriver into the small notch and gently pry off the rear access cover on the back side of the fob.

Set the back cover aside in a safe place.

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Pull Off Battery Cover
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Old Battery In Socket
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Gently Pry Out Old Battery
Gently pull off the red plastic battery cap and set it aside with the rear cover.

Use the small flathead screwdriver to gently pry out the old battery from the socket.

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Old Battery Removed
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Panasonic CR 2032 3V
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"+" Positive Side Facing Up
The OEM battery in the fob for this 2018 Camry was a Panasonic CR2032 3 volt.

You'll notice an instruction diagram on the side of the battery compartment indicating that the battery should be installed with the "+" positive side facing up towards you and the "-" negative side facing down.



 

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Lower In New Battery
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Push Into Holder
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New Battery Installed
Lower the new CR2032 battery down into the socket.

Make sure the new battery is fully seated.

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Replace Red Plastic Cap
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Line Up Rear Cover
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Snap On Rear Cover
Push the red plastic cap back into place over the new battery.

Line up the rear cover with the back side of the fob.

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Flush All Sides
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Key Fob Re-Assembled
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Test New Key Fob Battery
Gently pop the rear cover back into place on the back side of the fob.

Make sure the cover is flush with the fob at every edge.

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

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

(You shouldn't have to re-program the key fob. Just replacing the battery should not clear the existing programming.)

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

For more, check out all of my 2018-2022 Toyota Camry DIY Repair & Maintenance Guides.
 

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