Gonzo is correct. Bulletin# 03-081a entitled 2003–2005 NISSAN MURANO; SUNVISOR SUPPORT CLIP LOOSE AND/OR RATTLES was issued in early 2006, and obviously solved his problem. However, I am not sure if the replacement of the clip will solve your problem. Is your visor dropping out of the clip or slipping (rotating) on the bar?
2005 SL AWD, Platinum
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields