Is it normal for the engine of a new Audi A3 to shake?

[Stephen]

Engine shaking in a new Audi A3 is not normal. Possible causes include a dirty throttle body, excessive carbon buildup in the fuel injectors, or aging engine mounts. Dirty throttle body and excessive carbon buildup in fuel injectors: A dirty throttle body and excessive carbon buildup in fuel injectors can cause issues after the car has been driven for a certain mileage. A dirty throttle body may lead to improper closing or sticking of the idle speed stepper motor, both of which can result in excessively high engine idle speed. Carbon deposits formed during engine operation can also cause vehicle shaking, especially when starting the car. The engine may shake more violently than usual, and in some cases, it may not start on the first attempt. Therefore, when experiencing engine shaking, the throttle body and fuel injectors should be inspected first. If excessive dirt or carbon buildup is found, they should be cleaned promptly. Aging engine mounts: Aging engine mounts can also contribute to car shaking. Engine mounts act as the vibration damping system for the engine, absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations can transfer to the steering wheel and the interior of the car, causing shaking at idle. The engine is most prone to shaking when the vehicle's electrical system is activated while the engine is idling. The electrical load increases the engine's workload, causing the idle speed to drop. To compensate for this and reduce shaking, the engine automatically raises the idle speed slightly.