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How to Program the Key of a Smart 454 After Replacing the Battery?

Model: Smart Smart 454, Fourfour1 - Years 2004-2006
Part: Key

When the battery of the Smart 454 ignition key runs low and needs replacing, it may be necessary to program its code; otherwise, the ECU will not recognise it, preventing you from starting the engine or unlocking the car. This video shows the procedure using the Obdstar program, connected directly via cable to the vehicle's OBD port. By following the guided steps of the software, you will reach the programming stage, which can be confirmed by starting the engine.

Updated on 19 August 2026 by ScegliAuto

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How to Replace the Remote Battery for the Volvo XC40?

In this tutorial, you will see how to replace the battery in the remote for the Volvo XC40, a very simple and quick operation. For this, you will need a replacement battery of type CR2032 and possibly a small flathead screwdriver. First, remove the front cover by pressing the button on the metal ring, then locate the second button, press it as well, and remove the opposite cover. Next, open the circular cap, take out the old battery, and insert the new one in the opposite direction. Finally, reassemble everything.

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