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How to replace the key battery of a Smart Fortwo

Model: Smart Smart 450 - Years: 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Part: Key

See other generations:
Video tutorial

Insert a metal-tipped screwdriver into the top part of the key and open the Smart Fortwo key, model produced from 1998 to 2007, into two parts. After opening the key, proceed with replacing the battery and insert a CR2032 in place of the worn-out battery.

Close the remote, and as a final test of the replacement, go near the vehicle to test the key's functionality by opening and closing the vehicle. If the key does not work, it may be necessary to reprogram the key by getting inside the vehicle and turning the ignition on and off several times with the doors closed and locked.


Updated on 16 October 2026 by ScegliAuto


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    Frequently Asked Questions

    • Smart 1998-2007 - What to do if the key gets stuck in the Smart? Read answer

How to Open the Fuel Flap on a Volkswagen Tiguan?

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by ScegliAuto

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