If you find out about a noise on your car, you are right to be concerned about that and take it seriously, although it is possible that nothing serious will come from it, it is also conceivable that it is the first signal of a more significant service. A noise that shows up on a door of your BMW 4 Series fortunately suggests a slight modification / repair, rather than a complex repair. In order to support you in your procedure, we have decided to write this article to provide you the most likely solutions to your problem. First of all, we will look at the different origin noises of air in the door of your BMW 4 Series, then hinge noises and finally at other possible possibilities.door-noise-bmw-4-series

Door air noise BMW 4 Series

Plastic air cache noise

If you encounter air noise on the doors of your BMW 4 Series, it is possible that it is linked to some plastic covers on the interior walls of your door. These can come loose, hole, fall and thus generate an air intake that will inevitably make a serious and annoying air noise in the passenger compartment. To validate that you don’t have this trouble on your BMW 4 Series, open your doors and inspect the sides of them carefully, see if all the covers are properly placed.

Air noise seal

Air noise at the doors of your BMW 4 Series can also be linked to a gasketfailing or overused. In fact, the door seal, in addition to have a protecting purpose against moisture infiltration, also has a protective function for air inlets in the passenger compartment. When it is worn, it will not settle and therefore no longer generate a perfect seal between the door and the car body. To check its condition, there are two methods, first, visually check 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 mechanic to have your seal changed and the door noise on your BMW 4 Series adjusted.

Hinge noise door hinge BMW 4 Series

Door noise BMW 4 Series, dry hinge

It is also possible, based on the type of sound you experience, that your hinge is at the origin of them. If this is the case, you will have to check it by opening your door and checking that the door noise on your BMW 4 Series comes from a hinge that is too dry. To solve this problem, first try to grease the hinge, in most cases this is enough to fix your trouble.

Noise porte BMW 4 Series, worn hinge

If you have followed our initial advice referring to your hinge, but the trouble still continues, it is plausible that your hinge is worn out and needs a change. In this circumstance, check that despite the lubrication it still causes a lot of noise when opening and closing. You should feel a “clack” and restraint in the movement. If this BMW 4 Series noise is your problem, change your hinge.

Other possibilities

Internal part of the damaged window regulator

In the other possibilities that can cause door noise on BMW 4 Series, we can first think of the window lift, in fact, after the hinge, it is the second advanced system of the door. If weakened, it can provoke vibration or even air noise. To check its condition, remove the door trim and check that no parts are broken.

unscrewed speaker

Finally, one of the last possible alternatives for BMW 4 Series door noise would come from a from your vehicle’s audio speakers. Indeed, they take place in the door and can, over time, loosen and generate a significant vibration and risk damaging themselves if you do not fix them again. Same procedure, you will have to dismantle the door trim to check its correct positioning.
If you can’t find solutions among this article, don’t hesitate to take your vehicle to your mechanic who can check your car in more detail to discover what the particular trouble is that you know.