I have heated seats in my 2011 Premium WRX. The light on the driver's side switch does not illuminate. The switch also feels "sticky". My first thought was that some sugary drink had spilled on it both burning out the light and accounting for the sticky feel. But the switch still functions. My seller (aka. my best friend) has assured me that is not the case. I still think it is an accurate description of the symptoms.

So my question is; is replacing the light in said switch cheap and easy, or is it going to be a PITA either as a DIY or costly factory replacement? Is this a common issue?

Thanks in advance.