It seems like you are describing a serious issue with the BMW’s exhaust system, specifically the turbocharger and the wastegate. The problem you are experiencing is not uncommon in BMW vehicles, and it can be caused by a variety of factors, including poor maintenance, malfunctioning parts, or improper installation.
The symptoms you described, such as the car’s lack of power, rough idling, and the exhaust sound, suggest that there may be a problem with the turbocharger or the wastegate. The fact that the issue started after a recent repair raises concerns about the quality of the work done and the possibility of a defective part.
I would recommend taking your car to a reputable BMW dealership or a specialized mechanic for a thorough inspection and diagnosis. They will be able to determine the root cause of the problem and recommend the necessary repairs.
In the meantime, it is essential to keep an eye on the car’s performance and take note of any changes or unusual symptoms. It may also be helpful to review the maintenance records and any recent repair history to see if there are any clues about the cause of the issue.
Please keep in mind that attempting to fix this type of problem without proper knowledge and tools can lead to further damage and potentially dangerous situations. It is always best to seek the assistance of a professional mechanic when dealing with complex issues like this one.
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