Ever since I had the car, there's been a high pitch noise coming from the engine compartment. Mostly, it happens when driving above 40 mph and under 55 mph. The noise gets louder when accelerating. When not accelerating, I can still hear the noise but it's quieter. I took it to the dealership and been told that they had several complaint about the same problem with the Jettas. I've been told to wait until they figure out the problem.