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Jeep Wrangler Key Fob Battery Replacement Guide
How to change the battery in the "smart" key fob for a JL 4th generation 2018 to 2023 Jeep Wrangler.

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2020 Wrangler Fob
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Back of Smart Key Fob
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Locate Notch - Bottom
This automotive maintenance tutorial was specifically written to assist owners of the "JL" fourth generation (2017, 2018, 2019, 2020, 2021, 2022 & 2023) Jeep Wrangler SUV in changing a weak or dead battery inside the "smart" or "intelligent" key fob remote control for the keyless entry system and the push button start system.

Owners of other Jeep, Dodge and RAM vehicles such as the Grand Cherokee, Compass, Renegade, Gladiator, Cherokee, Grand Wagoneer, Wagoneer, Charger, Challenger, Durango, RAM 1500, Promaster, 2500 and 3500 may also find these DIY instructions to be helpful.

The compatible replacement coin cell battery part number is CR2450.

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

Turn over the key fob and locate the small notch on the black plastic rear cover.



 

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Insert Screwdriver
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Pry Off Rear Cover
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Gently Loosen Cover
Insert the blade of your flat head screwdriver into the small notch.

Gently pry off the rear cover of the fob housing.

Try to avoid using excessive force. The back cover should pop off relatively easily.

You may need to remove and reinsert the flat head screwdriver several times to fully remove the rear cover.

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Continue Prying Off
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Carefully Pull Off Cover
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Back Cover Removed
Pull off the rear cover and set it aside in a safe place.
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Plastic Retaining Clips
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Old Battery Exposed
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Pry Out Old Battery
Use a small flat head screwdriver such as from a precision screwdriver set to gently pry out the old battery from its socket.
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Old Battery Removed
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Panasonic CR2450
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Empty Battery Socket
Slide the old battery out of the socket.

In the smart fob for this 2020 Wrangler, the OEM (original equipment manufacturer) battery part number was a Panasonic CR2450.

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Positive "+" Side Up
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Lower In New Battery
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Gently Pop Into Socket
Orientate the new battery with the "-" negative side facing down and the "+" positive side facing up towards you.

Gently slide the new battery into the socket.

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Line Up Rear Cover
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Push On Back Cover
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Snap Together
Line up the rear cover over the fob and gently snap it back into place.
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Flush Together
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Key Fob Reassembled
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Test New Battery
Make sure the back cover is flush with the key fob at every edge.

To test the new key fob battery, stand near your vehicle and press the "Lock" and "Unlock" 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 should not have to reprogram the key fob. Just changing the battery should not clear the original programming from the factory.

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

For more, please check out all of my 2018-2023 Jeep Wrangler DIY Maintenance Guides.
 

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