Hearing noises from your automobile often is never reassuring, so hearing noises on your Bmw Serie 3 E90 suspensions when you pass a speed bump can be worrying. This symptom may be a sign of a small issue as well as a warning of a much larger repair to come. Whatever the case, it is important to check the origin and take the necessary actions to eliminate the issue, it is with this aim in mind that we wanted to write this document to support you see more clearly. We will first see the possible reasons for a crack when the speed bump passes, after that, what can be the reason of a squeaking noise when a speed bump is being passed and finally what to do if you have another noise when a speed bump is passed.
Suspension cracking noise Bmw Serie 3 E90
Check Bmw Serie 3 E90 suspension
If you notice a suspension noise when you pass a speed bump on your Bmw Serie 3 E90, and it is categorized by a “clack” or cracking, it is highly possible that your suspension block is the cause of it. In fact, it may be the suspension cups, which, when they are old, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its function during small bumps that compress the suspensions. To verify if this is the issue that concerns you, take a dented road and listen to the noise coming from your front axle as you go over holes. If it is indeed the cups, think of swapping them quickly or you may damage other parts and have to make more important repairs.
Check the cardan shaft
If you are here because you have searched for “Bmw Serie 3 E90 suspension noise” and the suspension is not the cause of your problem, it may be that the cardan shaft is responsible. In fact, when the cardan bellows get old and the dirt/dust amasses inside them their working is degraded and it is possible to experience a noise when they are in torsion. To verify this, you can try both types of torsion, first vertical with suspension compressions on the speed bump passages, and horizontal when you are going to make a turn at low speed. If it cracks in these two cases you should consider changing it or them. If you have the feeling that this noise is more like a a loud noise on Bmw Serie 3 E90, don’t hesitate to consult this document.
Check steering hinges/stabilizer bar
Finally, when you detect a suspension noise when your Bmw Serie 3 E90 passes over a speed bumps, it is possible that the hinges or the stabilizer bar are responsible. Just like the gimbals, the steering part is mobilized when you vary direction. If this is the case, the parts that may have been affected by usual wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the causes of your noises, to verify it, position it under the automobile and apply twists on each of its elements to verify that there is no particular play on one of them, they are meant to resist you quite strongly over their entire travel. Keep in mind to take your Bmw Serie 3 E90 to your mechanic or change them if they are involved.
squeaky noise speed bump Bmw Serie 3 E90
Check the stabilizer bar
If, however, you have a noise that is more like a squeak when you pass a speed bump with your Bmw Serie 3 E90, it is possible that it is the stabilizer bar itself that is involved. In fact, abnormal/pronounced wear of the latter can cause unusual friction which can generate this squeaking noise. Remember to verify by passing under your automobile the condition of the paint on your bar which will indicate if there is friction. Second possible point, it may be your stabilizer bar silentblocks that are dry and provoke noise, in which case disassemble them from the cradle and grease them, this should fix the issue.
Check engine silentblocks
Finally, last case that we can verify together, it is the engine silentblocks, in fact, these silentblocks work as pads/shock absorbers between the engine and the cradle of the automobile, a obvious fatigue of these will create a subsidence and therefore a space between the engine and the silentblocks, it may happen that a squeaking noise happens when you pass a speed bumps or any holes with your Bmw Serie 3 E90. To replace them go to your mechanic.
Other speed bump noise Bmw Serie 3 E90
If, despite all its assumptions, you still can’t locate the origin of the noise your Bmw Serie 3 E90 makes when you pass a speed bump, we encourage you to refer to this content on a loud noise on Bmw Serie 3 E90 or to visit your mechanic in order to carry an in-depth check on your Bmw Serie 3 E90 and discover this issue.
