My wife drives our 2004 X5 4.4i and is experiencing odd electrical issues w/ the nav system and radio. Shuts off / turns on.. radio won't turn off / on. Any clue what I should check out? The battery is barely a year old.

Thx.

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A Powell
Blaine, MN
2012 X5 35i Silver
2013 X5 50i Black Sapphire Metallic