TOYOTA 2011 Camry - Manual (Page 431)

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4-3. Do-it-yourself maintenance
Key battery
Replace the battery with a new one if it is discharged.
■ You will need the following items:
● Flathead screwdriver (To prevent damage to the key, cover
the tip of the screwdriver with rag.)
● Small Phillips-head screwdriver
● Lithium battery CR1632 (vehicles with smart key system), or
CR2016 (vehicles without smart key system)
■ Replacing the battery
Vehicles with smart key system
Take out the mechanical key.
Remove the cover.
STEP 1
STEP 2