Fix it asap. Every time it blows off its unloading the turbos causing them to over speed. Good way to blow them.
2010 e92 M-sport Mods: VM Top mount 6466, Aquamist HSF4 w/custom direct port. VRSF IC + Exhaust
335i 2009 e90 665RWHP Mod's: Vishnu/FFtec 6466 ST RIP
3000GT VR4 1994 647AWHP Mod's: Fully built/forged block, twin TD-05's, Meth, and a whole lot of support.