When you notice unusual sounds on your BMW 3 Series you tend to worry about them. Especially when you feel a noise when you accelerate on your BMW 3 Series. It is automatically assimilated to an engine motor trouble and can therefore be considerable. As we know that you do not take these trouble lightly, we have chosen to write this document to support you find the causes and get rid of this concern as quickly as possible. To do this, we will first see what are the reasons of a high pitched noise when accelerating with my BMW 3 Series, then what is a whistling or ratling noise at the acceleration of my BMW 3 Series, then the origins of a noise that intensifies during acceleration and to finish a noise that ceases when I stop accelerating.
Ma BMW 3 Series makes a high-pitched noise when I accelerate:
If your BMW 3 Series generates a loud noise when you accelerate, it is quite possible that the alternator belt is the cause of your trouble. You will need to define if this noise occurs abruptly and if it can stop as it started. The alternator belt is a wearing part that is used to bring power to the secondary components of your BMW 3 Series’s engine and although it is less vital than the timing belt it can generate engine troubles if it breaks. This sound may be a sign of a slackened belt, in which case the tensioner roller or its wear and tear may be at fault. In any case, examine the state of your belt and its tension. If it causes this acceleration noise on BMW 3 Series, go to your auto technician.
Ma BMW 3 Series makes whining noise when I accelerate:
- Rattling or whistling noise generated by the turbo
- Humming noise caused by air leakage
If you have a power loss that comes with the rattling noise when you accelerate with your BMW 3 Series, it is plausible that your turbo is declining and some of its elements are at the end of their life. Verify it and replace it if it is the cause, otherwise you risk clogging your engine in the long run. If you find out this blowing or whistling sound on your car, feel free to read this article about turbo noises on BMW 3 Series, if you would like more info.
If, on the other hand, you do not experience any power loss due to an humming noise on your BMW 3 Series, it is more than likely that you have one of your junctions or air hoses that has holes. So examine the complete air supply system from your air filter to your engine to locate the source of this acceleration sound.
Ma BMW 3 Series generates an increasingly loud noise when I accelerate:
If, on the other hand, you have the feeling that the more you gain speed, the more your noise at acceleration on BMW 3 Series gets loud, then you will have to check out the rolling parts of your automobile. In fact, if this loud noise does not emerge when you iddle, it is certainly connected to your transmission, and, in general, to your wheels. The most basic reason is the state of your bearings, so don’t forget to examine their condition to ensure that it is not the reason of this loud noise when you accelerate. If not, go to this article about the noises related to BMW 3 Series noise wheels.
Ma BMW 3 Series makes a noise when I accelerate that ends when I stop accelerating:
To finish, if you experience a noise when accelerating with your BMW 3 Series and this noise which could be a cliking sound tends to stop when you disengage (press the clutch pedal), then one of the wear parts of your clutch system may be the reason. In fact, the clutch release bearings must be swapped around every 120 000 / 130 000km. To evaluate it, you just have to see if you have more difficulty than usual shifting gears, if you feel a resistance either stronger or non-existent in the clutch pedal. If you have any of these signs of illness, go to your technician to change the clutch release bearings on your BMW 3 Series. Go through our article on clutch noise on BMW 3 Series for more information.