2009 Toyota 4Runner Owners Manual - Page 424

4 -3 . Do-it -yourse lf m a int e na nc e Wire le ss re m ot e c ont rol bat t e r y Replace the battery with a new one if it is discharged. n You will need the following items: l A coin or equivalent l Lithium battery CR2016 n Replacing the battery Remove the cover using a coin protected with tape etc. Remove the depleted battery. Insert a new battery with the "+" terminal facing up. 402