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|5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)|
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| Originally posted by EXtech@Feb 8 2004, 02:22 PM |
Lucky, have you noticed a decrease in RPM at idle (idle speed lower)? Or even an increase? How many miles on the car?
I'm theorizing that what you are hearing is vibration (oscillation) and not necessarily a throatier exhaust note, which could be many possibilities... idle characteristic change (typically a low idle), transmission mounts, engine mounts or exhaust hangers. Without being there in person to personally experience your complaint, it's hard to tell you a direction to look but I would have the dealer look towards the engine mounts first. I have seen several of the 5 and 7 series crack the passenger side engine mount and a few on the driver's. The passenger side is a little longer and more brittle so it's usually the one to crack. However, this may not even be your problem. You may actually have an issue within the transmission or a broken exhaust hanger.
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