sorry about the title, it was supposed to be "Motor Sound System (MSS)" but i hit the enter somehow :s ... mods, can you please fix it, thanks.

I've read that the M54 engine has a module in the air ducts, connected to the engine in a way that generated this roaring sound on high RPM, whose objective is to create the special sound for the passengers...

Quoting document E85 M54 engine:

"Motor Sound System (MSS)
The Motor Sound System is a membrane system for modulating and transmitting the intake system pressure pulses to the passenger compartment. This generates a sporting sound that is typical of a roadster.
In this market segment, BMW is the first manufacturer to deliberately transmit pressure pulses from the intake system to generate sound in the passenger compartment. The MSS is only installed on the M54B30 engine."

The 3.0i 2001 has the M54B30 engine, no? can you confirm? so do i have the MSS???

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BMW X5 3.0si 2008
Premium Package
Light Package
Navigation
Reverse Camera
Rear Sensor (retro-fit)
Comfort Access
Spare Wheel
Power folding mirrors
Voice Control w Bluetooth
Power trunklid

BMW X3 3.0i 2006
M Aerokit
M Sport Package
Navigation System
BT Handsfree
Xenon HID

BMW X5 3.0i 2001 --- SOLD