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Message: <blockquote data-quote="Heyrish" data-source="post: 710479" data-attributes="member: 42807"><p>Hi , Recently I purchased an used Z4 2009 model 23i. Before I purchased I brought to auto Bavaria and did full 78 check point and they give thumbs up for these car. Then after a week, I was thought of sign up warranty and brought to one of the main panel. However for my surprise they test drive and mention the car transmission gear jerk in M sport mode. The option the panel gv me is to change the oil before and try again if it fixed the problem before sign up warranty. The confusing part is there is no indication in diagnostic that these is faulty or BMW auto Bavaria had seen these earlier. Further the Auto Bavaria specialist advice don't ever change the transmission oil which suppose be life time usage. He reminded several time don't ever change and now these panel only giving me these option. I would require some expertise advice here.</p></blockquote><p></p>