High pitched whistle when you accelerate? I found where mine was coming from.

[The Cleaner]

By the way it's only about 35 bucks for that one and the 3.0 thing is 200.

[broknlgs24]

wow! i'll have to check into that.
shoot, for $35, y not?

[noncom23]

Is it easy to get to?

[Stewthebassman]

Hey Guys...got out to the parking garage this aft and GUESS WHAT....Cleaner's Boot had a bigass hole underneath it!!!!

I can't wait

a) to find out if it's covered on my CPO warranty and
b) to get it fixed and see if the noise goes away!

Thanks Cleaner!

[The Cleaner]

Yep, on the underside is where mine ripped, could not see it unless you were looking for it.

It will be covered, but the part is only 15 bucks and labor is probably about .5 of an hour. I just did mine myself

[Stewthebassman]

Okay Cleaner, YOU ARE MY HERO.

That effing noise has been bugging me for SOOO long.

This morning, with a cold engine (obviously) I took some DUCT TAPE and wrapped it pell mell around the hole. Started the engine.

NO WHISTLE, NO STALLING ON STARTUP.

I told my wife (her car) and she said, "My poor engine, suffering all this time!!" And I agree with her.

I can't wait to get to the 'ship Monday morning and inform them of this revelation, maybe it'll help out other X5 owners in Montreal.

I'm incredulous that such an easy fix isn't seared into the technicians' brains and checklists!

[szyctom]

I have the same problem with my X5 3.0 2001, 58000 miles, whistle when it accelerate from low to high, after getting speed, it's gone.

Plus, My SES light up again, this time is the 4th time in less than a year, check with dealer, first 2 is wire harness, fixed, 3rd is intake sensor, fixed, now the 4th time, what is gonna be? help me!

[RUSTY]

I am not very happy to join this "club" at all!!

I have just got my X5 3,0 Turbo Diesel (great car!), an I am getting crazy over the very high frequent sound.

It comes when I accelerate smoothly and when the cruise-control is adjusting the speed, which happens all the time.

When accelerating faster I don´t hear the sound.

At the dealers they can hear the soud, but the say it´s normal. NORMAL??

In Denmark an X5 costs DKK 1.200.000 ($ 210.000). You can get a house or a flat for the same amount - and the dealer says it´s normal!

This thread however has given we a few ideas to be tried.

Maybe I should give the car to my wife as she is not able to hear the sound - the I can take over her Toyota Rav4

[noncom23]

Another suggestion...

OK. My 4.4, 06', started whinning at about 1500mis. Took it in and here is the result:

" Evaporator drain tubes contacting driveshaft and transmit noise through cabin.
Test drove to verify complaint. Per SIB 64 18 05 Installed valves at end of both drains. Test drove again to verify noise no longer present.
Part 54-10-7-070-130."

Well it worked. No more noise. Not sure if this helps anyone else.
I will look up the part in BMW OEM.
__________________

[Lotus Man]

OK, mine does this too. But the important question is:

Is this airboot *before* or *after* the airfilter? If it's before...I could care less. If it's after, we're talking dirty unfiltered air/foreign debris getting inside the engine!