Fix it asap. Every time it blows off its unloading the turbos causing them to over speed. Good way to blow them.
Have a single turbo and/or tired of burning up O2 sensors? Ask me about the new ADV O2 sensor retro kits!
2010 e92 M-sport Mods: VM Top mount 6466, Aquamist HSF4 w/custom direct port. VRSF IC + Exhaust
335i 2009 e90 665RWHP VFF900 ST RIP