I recently noticed that my BMW 4 Series' engine is making a strange noise. It sounds like a high-pitched whine and I'm not sure if this is normal. Is this something I should be concerned about? What could be causing this noise? Please help!
See AnswersI'm looking for ways to make my BMW 4 Series handle better around corners and give me more control on the road. Any suggestions on what upgrades or modifications I should consider?
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