Hi folks,
I am experiencing an annoying bug in my 99 740i which happens after the car gets up to operating temperature: when I step on the brakes (even if slightly), a high-pitched hum can be heard even from within the cabin, windows up. When I step outside, the hum is even more pronounced. This hum persists for about 30 seconds, then begins to fade away.
However, when I'm in stop-go traffic, the hum (or drone) is incessant, because I have to brake frequently.
I leased the car, BMW certified, from a BMW dealership and it is under warranty. The car has 28K miles.
I would appreciate hearing from other similar-vintage BMW drivers who have experienced this problem. Any ideas or thoughts are welcome.
Thanks in advance,
Scarab
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