RAB
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The nav system in my 07 RX350 cannot find many addresses, even some in older parts of town. We live in Southeast Ohio. When trying to enter a destination you get an "address unknown" error. The GPS DVD is version 6.1. I have seen reference to a version 7.1 upgrade. Does anyone have experience with this upgrade to know if it helps in this area? Is this upgrade available from after market sources?
