The filter is just a cartridge that had no valving, but it could also be noise from the vanos. Likely the best way to get to the bottom of the noise is to get away from the guesses of indys that don't know all the ins and outs of BMW systems and bring it to the dealer for proper diagnosis. At least the techs there are trained on the BMW specific systems and have all the resources/special tools for isolating and diagnosing the weird problems.

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"When you do things right, people won't be sure you've done anything at all" (Bender, futurama)

You make something idiotproof, they'll make a better idiot

You think professional is expensive, just wait until you pay for amateur.

Never let your sense of morals prevent you from doing what is right.

Examine what is said, not who speaks.

X5 pics

RIP 4.6is.....

2003 4.6is