Hello! The signs of a bad turbocharger can vary, and it is important to identify them as early as possible to avoid serious problems. One of the most common signs is a decrease in engine performance. If you notice that the engine has become less responsive or has lost power, this may indicate a problem with your turbos. Another warning sign may be an unusual whistling or noise from the turbocharger that appears when it is running. This can be caused by worn bearings or other internal damage. You should also pay attention to black smoke from the exhaust pipe.