It should be safe to drive but don't rely on your ABS.
If you have full VW service history you may be successful in getting VW to put this right for very little cost. They know it is a common fault.
If you don't, then look at:
http://www.ecutesting.com/vw_golf_touran_abs_pump_module.html
It will need doing before your next MOT test.
ChicksFan, November 2011
