No, more than likely a broken switch. My rear defroster button doesn't work any longer, except I think it is stuck in the on position - when I get in my car and start it, the rear defrost automatically comes on and then times out after 15-20 minutes, however I cannot manually turn it on or off.

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2001 X5 3.0i (PP/WP/AP) Traded at 213K miles
RARE White on Black - Why does everyone get Tan??
First E53 with 215s on XOutpost!!