You can go HERE and select your magellan and your model # on the right hand side and it will give you all the updates for your model...the map section you will have to pay for that
just follow the directions.
any updates for your Magellan 3140 can be found HERE at the Magellan website.
i would recommend you update the firmware before attempting any map upgrade.. all updates are at the link listed above.
bill
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