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How to replace the key battery for a 2012 Toyota Corolla?

Asked by Moira

The key to my 2012 Toyota Corolla sometimes won't work so I presume that the battery is getting flat. Can I buy the internal battery case or can the battery be changed in it? Should I just take it to the Toyota people?

Answered by CarsGuide

24 Sep 2020 David Morley

You should be able to prise open the key’s plastic body and then gain access to the battery-case within. But be careful, as older plastics become brittle with age and you don’t want to snap any of the locking tabs or the body itself (if you do, replacement keys are available online). If that all sounds a bit difficult, you could take the key to a shop or kiosk that cuts keys (and sells watch-bands and batteries) and they should be able to supply and fit the new battery for you. If you do it at home, make sure you dispose of the old button-battery safely as these pose a real threat to babies and toddlers.

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