Toyota 2012 Highlander Owner's Manual page 471

4-3. Do-it-yourself maintenance
Wireless remote control/electronic key battery
Replace the battery with a new one if it is discharged.
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You will need the following items:
● Flathead screwdriver (To prevent damage to the key, cover
the tip of the screwdriver with a rag.)
● Small Phillips-head screwdriver
● Lithium battery CR2032 (vehicles without smart key system),
CR1632 (vehicles with smart key system)
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Replacing the battery (vehicles without smart key system)
STEP 1
STEP 2
496
Remove the cover using a
coin protected with tape etc.
Remove the discharged trans-
mitter battery.
Insert a new battery with the
"+" terminal facing up.