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Message: <blockquote data-quote="FIRZ67" data-source="post: 18797" data-attributes="member: 4633"><p>Dear E90 sifus,Of late found out that my car  has act weirdly when driving at speed range of 40-60kmh. When accelerate fast it is fine but when you decelerate and accelarate back ,i can feel a slight vibration from undercarriage.This normally happened at higher gear range  eg  3rd to 4th gear.I have not tested yet whether it could be from the tyre or any other possibilities eg. gearbox mounting or exhaust mounting.Or is there anything to do with drive shaft/long shaft.Wonder if anyone of you have experience this and able to share & recommend countermeasure?Thanks</p></blockquote><p></p>