Experiencing noises from your auto regularly is never comforting, so listening noises on your BMW 5 Series suspensions when you pass a speed bump can be stressful. 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 necessary to check the origin and take the necessary actions to correct the issue, it is with this goal in mind that we wanted to write this content to support you see more clearly. We will first see the possible explanations for a crack when the speed bump passes, then, 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 5 Series
Check BMW 5 Series suspension
If you experience a suspension noise when you pass a speed bump on your BMW 5 Series, and it is characterized by a “clack” or cracking, it is highly plausible that your suspension block is the origin of it. Indeed, 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 role during small bumps that compress the suspensions. To examine if this is the issue that concerns you, take a dented road and pay attention to the noise coming from your front axle as you go over holes. If it is indeed the cups, think of replacing them quickly or you may affect other parts and have to make more important vehicle repairs.
Check the cardan shaft
If you are here because you have researched for “BMW 5 Series suspension noise” and the suspension is not the cause of your problem, it may be that the cardan shaft is responsible. Indeed, when the cardan bellows get outdated and the dirt/dust accumulates inside them their working is degraded and it is possible to experience a sound when they are in torsion. To examine 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 5 Series, don’t hesitate to refer to this content.
Check steering hinges/stabilizer bar
Finally, when you find out a suspension noise when your BMW 5 Series passes over a speed bumps, it is plausible that the hinges or the stabilizer bar are responsible. Exactly like the gimbals, the steering part is mobilized when you change direction. If this is the situation, the parts that may have been destroyed 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 examine it, place it under the car and apply twists on each of its elements to examine that there is no special play on one of them, they are supposed to endure you quite strongly over their entire travel. Remember to take your BMW 5 Series to your auto mechanic or replace them if they are involved.
squeaky noise speed bump BMW 5 Series
Check the stabilizer bar
If, alternatively, you have a noise that is more like a squeak when you pass a speed bump with your BMW 5 Series, it is plausible that it is the stabilizer bar itself that is concerned. Indeed, abnormal/pronounced wear of the latter can cause abnormal friction which can provoke this squeaking noise. Please remember to examine by passing under your car the condition of the paint on your bar which will show if there is friction. Second plausible explanation, it may be your stabilizer bar silentblocks that are dried out and provoke noise, in which case disassemble them from the cradle and grease them, this should solve the issue.
Check engine silentblocks
Finally, last possibility that we can examine together, it is the engine silentblocks, actually, these silentblocks process as pads/shock absorbers between the engine and the cradle of the auto, a pronounced fatigue of these will create a subsidence and therefore a space between the engine and the silentblocks, it may happen that a squeaking noise occurs when you pass a speed bumps or any holes with your BMW 5 Series. To swap them go to your auto technician.
Other speed bump noise BMW 5 Series
If, even though all its assumptions, you still can’t find the origin of the noise your BMW 5 Series makes when you pass a speed bump, we recommend you to read this content on a loud noise on BMW 5 Series or to visit your auto mechanic in order to carry an in-depth check on your BMW 5 Series and determine this issue.
