BMW Repair Questions? Ask a Mechanic for Answers ASAP
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this would most likely be caused by a failing eccentric shaft sensor - it should be checked for oil contamination. another possibility could be a fault with the valvettronic actuator but the sensors are more likely to cause issues..Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.