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451 Keyfob Battery
Batteries don't last forever so instead of getting locked out of your car, let's change the battery for a fresh one.
Here is the Fortwo 451 key, it is very similar to the Forfour key.
The USA 451 key has a red panic button but the instructions are the same.



Take a coin, insert it in the back of the key and lever it open.



The 2016 battery is situated on the left in the picture below.



Swap the old battery out for a new one as quickly as you can.
Make sure you get it around the right way.

Ideally the battery in each keyfob needs to be changed at the yearly service.


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