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If updates were still being made available, the one for east of the Mississippi for 2018 would be PT219-GEN5E-18 and the one for west of the Mississippi for 2018 would be PT219-GEN5W-18.  From what I am reading, only the POI's are different on the "east" and "west" DVD's.

The last two digits indicate the update year, e.g. "-18" = 2018.

A Lexus dealer can tell you if generation 5 map updates are still being made available.  Map updates for generation 4 navigation systems were discontinued after the 2015 (-15) update.

Beware of scams of navigation updates on eBay and Amazon.  There's no such thing as a current, valid, non-pirated navigation update for less than about $130 which is about dealer cost. 




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Thank you so much for your response!

I initially started looking on eBay and Amazon, but I decided against it after reading post about the potential of the system locking up. Not worth taking the chance  

I will call the dealership and purchase directly from them if available. 

Happy holidays!

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