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Old 01-22-2013, 08:30 AM
imz4n's Avatar
imz4n imz4n is offline
Location: OC, CA.
Join Date: Oct 2005
Posts: 751
Mein Auto: 06 3.0 si Z4R
Could be the DISA valve. Do a search and see if the rattle match what you have going on. The DISA and be unplugged to eliminate as a problem. This is on a e46 however the same applies to the Z4.
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