I have an 2001 X-5, 3.0 that has a problem with the control unit for the wipers. It works on the continuous mode; it works on the click mode for one swipe but does not work in the variable time mode. I'm guessing that it is due for a new unit....I'm also guessing it's very expensive and hard to do.....no? I've never even found the item on a parts link, let alone the cost. Onyone have any insight / help? Thanx

Sweetrl