What can be more frustrating than experiencing a constant noise when driving your car, whether it’s because you want to listen to your favorite radio or chat with your passengers, experiencing an air noise on BMW 4 Series is always distressing. It is with this in mind that we wanted to write this article. In fact, our team wanted to give you the keys to eliminate this recurring issue that can become frustrating in the long term. First we will look at the air noise on BMW 4 Series based on the cabin, then at the air noise that manifests itself during acceleration, and finally at the air noise on BMW 4 Series that is coming from doors.
I perceive an air noise in the cabin
if you detect of an air noise on your BMW 4 Series and it is located in your cabin, it may be related to a fan that has shifted or is starting to dry . No matter the reason, you will have to check out the fan in question to visually verify its state. The easiest approach is to open the ventilation circuit, and rotate the circuit while you are watching its proper performance, you can try to grease it to limit this noise, but it is very likely that the final answer is to replace it.
If you haven’t found the answers to your questions in this section but your air noise on BMW 4 Series comes from your cabin, read both articles, firstly cabin noises on BMW 4 Series and heater fan noises on BMW 4 Series can surely help you find the reason.
I perceive an air noise when I accelerate with my BMW 4 Series
Air noise BMW 4 Series caused by an air intake hose
The first of the two alternatives that can develop an air noise on BMW 4 Series at the time of acceleration and the less severe. Is that you have one of your air intake hoses that has been punctured or cracked. This failure will cause a large and unexpected air intake . This will show itself in a loud air noise at acceleration when the air intake is running at full throttle. So verify the state of all your hoses, don’t hesitate to ask someone to accelerate while you look at the engine block to help you identify the area of origin of air noise on BMW 4 Series.
Air noise BMW 4 Series linked to your turbo
One of the other possible origins of your air noise on BMW 4 Series is your turbo. In fact, a broken turbo will emit a sound close to an air or breath noise when it is switched on. It will be used during your acceleration phases. You may also feel a power loss that would reveal the failure of your turbo. It is also possible that a lack of lubrication is the reason of this noise. Have it checked, and replace it if necessary, if you don’t want to get your engine dirty. If your air noise on BMW 4 Series manifests itself well when you accelerate at any speed, but you want more details about it or you still haven’t found the reason, read both articles about turbo noises on BMW 4 Series and noise when accelerating on BMW 4 Series for more details.
I perceive an air noise on BMW 4 Series at the doors
Air noise BMW 4 Series linked to plastic door covers
If you encounter air noise on the doors of your BMW 4 Series, it is plausible that it is related to some plastic covers on the inside sides of your door. These can come loose, hole, fall and thus produce an air intake that will obviously make a distinctive and disagreeable air noise in the cabin. To ensure that you don’t have this issue on your BMW 4 Series, open your doors and examine the sides of them carefully, see if all the covers are properly installed.
Air noise BMW 4 Series linked to door seals
Air noise at the doors of your BMW 4 Series can also be related to a gasketfailing or overused. In fact, the door seal, in addition to have a preventive purpose against moisture infiltration, also has a protective role for air inlets in the passenger compartment. When it is worn, it will not settle and therefore no longer give a perfect seal between the door and the car body. To verify its state, there are two solutions, first, visually verify the state of the seal and for the second test, install someone inside the passenger compartment and door by door, car closed, sprayed with water the seals to see if water goes in. If you are in this case, go to your auto mechanic to have your seal changed and the air noises on your BMW 4 Series removed. If your air noise on BMW 4 Series is not fixed despite reading this part, that it is present at your doors, we advise you to have a look at this complete article on door noises on BMW 4 Series which should allow you to find the solution to your issue.