17th June 2008, 10:31
M5 Expert (>4000)
Join Date: Jan 2001
Location: Silicon Valley
M5 - Titanium Silver '01
Thanked 216 Times in 142 Posts
I believe they're called Dzus fasteners. They're supposed to be quick release fasteners; twist 1/4 to half turn to fasten/unfasten. But as others noted, they're a bit tricky, and one can easily not seat them correctly, in which case they can fall out. If enough of them fall out, you can lose the underbody panel. This doesn't seem as trivial as one might expect. The loons working on the cars often don't care, but the underbody panels are important for control of airflow under the car. Loss of panels can result in excessive noise or more importantly, lift or some other undesireable effect at high speeds. In fact, I have found things missing underneath after dealer visits such as the "door" leading to the oil pan drain plug.
'01 M5 (now my brother's car) UUC SSK + Rogue WSR/RE Tranny Mounts+Royal Purple Synchromax/Axxis ULT Pads/StopTech SS Lines/TC Design from BeastPower Anti-roll Bar Brackets/Dinan LtWtFlywheel and Stage 3 suspension/4xOEM rear 275 Goodyear F1 Asymmetrics/Vines thrust arms/IATS relocation/10w-60 oil/hardwired Escort 9500i/Euro Armrest/TEC Cupholder/IceLink/PowerChip 91 Gold/TUBIs!/Strong Strut/BSW Stage 1/BT/Angel iBrights 3.0/space-saver spare by Bimmerzone
'11 Jaguar XFR, Quicksilver exhaust, Escort 9500ci
Unnamed weekend Italian 2 seater with DCT
Future - F10 M5 with manual transmission?
"Is it the sounds that make a BMW a BMW? A BMW is designed to be heard, felt, experienced. So our engines sing. Our steering talks back. And we insist on offering manual transmissions in nearly all our models for drivers who crave them. The result is an almost telepathic oneness with the car. Just as surely as you can hear a BMW, a BMW hears you."