No more oil than is shown in the photo, I wouldn't worry about it. If enough gunk accumulates to prevent the throttle butterfly from closing completely (thus affecting the butterfly stepping motor/positioner signal to ECU), then you should probably clean it.
If you've never had your PCV system apart, that is probably the better place to spend your cleaning efforts (especially if your valve cover gasket is seeping oil like most I've seen, including mine).
Frankly, cleaning the throttle body is one of the easiest maintenance tasks I DO on my Passat. I can't think of a reason why not, even though that one doesn't look bad. A $2 gasket, a can of throttle body cleaner, and 10 minutes. Then you're set for another year or two.
1 - 5 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.