Originally Posted by Harleyguy

Not sure of the size specific to those bolts but should be a Torx bit that will fit. Craftsman, Snap On, and various tool companies have them in sets for use with standard square drive ratchet sets (3/8 & 1/2 inch drive ). Many tool supplies can sell individual bits if you know what size you need. European cars are not the only ones using these type fasteners. Everyone from Harley Davidson to Ford, Chevy, even heavy trucks are now using a lot of the Torx head fasteners on their vehicles. Either way buy decent bits. If you buy the cheap ones they will either break, the points get rounded off because of poor fit, or the star shaped hole on the bolt gets stripped out. When inserted the bit should fit snuggly in the hole with contact at all the "star" points.