2.2 Opening Punch Rivets By Drilling Out
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 335xi, 2010 BMW 335i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
Drill out rivets with a 6 mm dia. carbide drill bit.
Punch rivets can be drilled out on both sides. When drilling from the protruding rear side, spot-drill the rivet shank only and remove the rest with a rivet punch.
Use a drift punch to remove punch rivet remnants in the aluminium (risk of corrosion).
Clean vehicle to remove chips (risk of corrosion).