I just got my Z4M back from my very friendly "official" BMW garage where they did some body repairs on my Z4M (new front bumper, new front inner wheel arch on each side - splashguard, new front side body panels on each side). I noticed that there are now all bolts instead of plastic revets holding the inner wheel arch to the front bumper. Before the repairs it was only plastic revets on this place and no bolds on my car... My dealer told me that the bolds are the correct way of fitting and that it was previously wrong on my car. He also showed some pictures of recent BMW's from the showroom and indeed on these new cars it are all bolds on this place and no revets...but a Z4M is far from a new car of course. But maybe it is the new and better way of fitting these and that is maybe the reason why it says "up to 03/2007" with the expanding rivets on the info of realOEM.com.
Before

After

Info from Real OEM (where it says "up to 03/2007")

Other new BMW

Before

After

Info from Real OEM (where it says "up to 03/2007")

Other new BMW

