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How to Replace the Battery in a Highlander Car Key?

3 Answers
VonJameson
08/29/25 2:24am
To replace the battery in a Highlander car key, follow these steps: 1. Press the toggle switch on the panel to remove the mechanical key; 2. Insert the mechanical key into the slot where it is stored and twist to open the remote; 3. Remove the old battery, install the new one, and snap the panel back into place. Taking the 2021 Highlander as an example, it is a midsize SUV with body dimensions of length 4890mm, width 1925mm, height 1720mm, a wheelbase of 2790mm, and a fuel tank capacity of 72.5 liters. The 2021 Highlander is equipped with a 2.0L naturally aspirated engine, delivering a maximum horsepower of 220PS, a maximum power of 162kW, a maximum torque of 350Nm, paired with a 6-speed automatic transmission.
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MichaelRose
09/10/25 7:09am
Replacing the battery in a Highlander key fob is actually quite simple. I often do it myself to save both money and time. First, locate the small button or groove on the side of the key fob, usually at the end of the remote, and press it to release the hidden physical key. Then, gently pry open the casing using a small tool like a coin or flathead screwdriver, being careful not to apply too much force to avoid cracking it. Once opened, you'll see a small circular battery compartment. Note the orientation of the old battery (usually positive side up) and remove it with a non-metallic tool. When inserting the new CR2032 battery, ensure it's properly aligned and press it in gently. Finally, snap the casing back together firmly and test the remote functions to confirm they're working. It's recommended to check the battery every two years to extend its lifespan. Brand-name batteries from supermarkets or auto parts stores cost just a few dollars.
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Clarisse
10/24/25 8:01am
As an average car owner, I just replaced the battery in my Highlander key a couple of days ago, and the whole process took less than 5 minutes. The main steps were: first eject the physical key part, then use a finger or small card to pry open the shell carefully without damaging the plastic clips. After removing the old battery, remember its orientation and replace it with a new CR2032 battery bought from the supermarket – problem solved for just a few bucks. After closing the shell, test the unlock and start functions to ensure everything works normally. I've found the battery lasts about two years, so regular checks can prevent the embarrassment of sudden power loss. If the shell is hard to open, you can first look up tutorial videos online for reference to avoid over-prying. After the replacement, the key is responsive again, making driving out much more reassuring.
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