3rd on the Timesert. MK4 Golf’s mounts are TTY bolts into an aluminum bracket. 14mm Timesert worked perfectly and you can usually use the drill included in the kit with a wrench to do it by hand. I highly recommend the tap holder which is a thick tube that allows you to put the tap in straight. 

Will 2nd the Timesert.  Used them on my STi brake calipers when they stripped out.