vsa,exclamation mark,abs

[kamiljanikjoul]

just a qiuck one because i am curious .
I was drilling hole for new ABS sensor cause old one was stuck .
how could i damaged hub? whats would happen if some bits from drilling left in there?
fault doesnt appers all the time on the dash board.

any ideas?

 

[wookie]

One side of the bearing is a magnetic ring which is part of the seal if it gets damaged in any way it can put the light on.