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Toyota RAV4 Key Fob Battery Replacement Guide
How to change the battery in the smart key fob remote control for a 5th generation 2019 to 2023 Toyota RAV4.

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2019 RAV4 Key Fob
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Back Side of Smart Fob
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Key Release Switch
This automotive maintenance tutorial was specifically written to assist owners of the fifth generation (2019, 2020, 2021, 2022 and the updated 2023 model year) Toyota RAV4 SUV in changing a weak or dead coin cell battery in the smart or "intelligent" key fob remote control for the keyless entry and push button start ignition systems.

Owners of other Toyota and Lexus vehicles such as the Camry, Corolla, Highlander, Prius, Avalon, C-HR, GR86, Venza, Sienna, Sequoia, 4Runner, IS 250, IS 300, IS 350, ES 350, GS 350 and GX 460 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 CR2032.

The OEM (original equipment manufacturer) battery in the smart fob for this 2019 RAV4 was a Panasonic CR2032 3 volt coin cell.

The tools and other items needed to complete this procedure include a standard flat head screwdriver and a small flat head screwdriver such as from a precision screwdriver set or a set of small plastic pry bar tools.

The first step is to locate the small black plastic sliding switch on the bottom edge of the key fob near the key ring loop.



 

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<-- Slide Release Tab
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Slide Out Ignition Key
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Metal Key Removed
Slide the release tab over to the left with one hand and slide the backup / emergency ignition key out of its slot.

Set the metal ignition key aside in a safe place.

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Empty Ignition Key Slot
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Small Notch In Center
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Flat Head Screwdriver
Look into the void where the metal ignition key used to reside and locate the small rectangular shaped slot in the center of the opening.

Insert the blade of the standard flat head screwdriver into the slot in the center of the opening.

Very gently pry apart the two halves of the key fob housing.

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Pry Apart Two Halves
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Separate Key Fob Housing
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Top Cover & Bottom
Try to avoid using excessive force. The two halves of the key fob assembly should pop apart relatively easily.

Lift the top cover (with the rubber "Lock", "Unlock" and "Panic" buttons) off the bottom half of the key fob housing.

Set the top cover aside in a safe place.

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Lift Out Remote Control
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Old Battery Exposed
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Pry Out Old Battery
Lift the remote control unit out of the bottom half of the fob housing.

Turn over the remote control unit to access the battery holder.

Use the small flat head screwdriver to gently pry out the old battery at the bottom edge.

Avoid damaging the metal retaining clips or the plastic retaining tabs.

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Gently Remove Battery
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Old Battery Removed
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Panasonic CR 2032 3V
Try to avoid using excessive force. The old battery should "pop" out of the socket relatively easily.

The OEM (original equipment manufacturer) battery in the smart key fob for this 2019 RAV4 was a Panasonic CR 2032 3 volt coin cell.

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Empty Battery Socket
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Install New Battery
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Lower In Remote Control
Orientate the new battery with the "+" positive side facing up and the "-" negative side facing down into the socket.

Gently install the new battery into the socket by first inserting the top edge under the plastic retaining tabs.

Then gently pop in the lower edge under the metal retaining clips.

Avoid using brute force. The new battery should pop in easily.

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Remote In Top Cover
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Line Up Rear Cover
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Snap Together Two Halves
Lower the remote control unit down into the top half of the key fob.

Line up the rear cover over the back side of the remote control unit.

Gently snap together the two halves of the key fob housing.

You should hear or feel the key fob "snap" back together. Make sure the two halves are flush at every edge.

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Replace Ignition Key
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Key Fob Reassembled
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Test New Fob Battery
Slide the metal ignition key back into its slot.

The key should "click" securely back into place.

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

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

Note - You shouldn't have to reprogram the key fob. Just changing the OEM battery should not clear the original programming from the factory.

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

For more, please check out all of my 2019-2023 Toyota RAV4 DIY Repair & Maintenance Guides.
 

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