Hearing noises from your car often is never reassuring, so listening noises on your Audi A4 suspensions when you go over a speed bump can be stressing. This warning sign may be a sign of a small problem as well as a warning of a much larger repair to come. In any case, it is fundamental to check the cause and take the necessary actions to correct the problem, it is with this aim in mind that we wanted to write this article to support you see more clearly. We will first see the possible causes for a crack when the speed bump passes, then, what can be the cause 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-noise-audi-a4

Suspension cracking noise Audi A4

Check Audi A4 suspension

If you experience a suspension noise when you pass a speed bump on your Audi A4, and it is categorized by a “clack” or cracking, it is highly possible that your suspension block is the origin of it. In fact, it may be the suspension cups, which, when they are outdated, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its function during small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 problem that worries you, take a dented road and focus on the noise coming from your front axle as you pass over holes. If it is indeed the cups, think of swapping them fairly quickly or you may damage other parts and have to make more important fixes.

Check the cardan shaft

If you are here because you have researched for “Audi A4 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 In fact, when the cardan bellows get outdated and the dirt/dust accumulates inside them their operation is degraded and it is possible to experience a noise when they are in torsion.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 circumstances you should consider changing it or them. If you have the feeling that this noise is more like a a loud noise on Audi A4, don’t hesitate to read this content.

Check steering hinges/stabilizer bar

Finally, when you experience a suspension noise when your Audi A4 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 modify direction. If this is the case, the parts that may have been broken by normal 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 vehicle and apply twists on each of its elements to verify that there is no special play on one of them, they are meant to resist you quite strongly over their entire travel. Please remember to take your Audi A4 to your auto technician or change them if they are involved.

squeaky noise speed bump Audi A4

Check the stabilizer bar

If, however, you have a noise that is more like a squeak when you go over a speed bump with your Audi A4, it is possible that it is the stabilizer bar itself that is concerned. In fact, abnormal/pronounced wear of the latter can cause uncommon friction which can cause this squeaking noise. Bear in mind to verify by going under your vehicle the condition of the paint on your bar which will reveal if there is friction. Second possible point, it may be your stabilizer bar silentblocks that are dry and provoke noise, in which case remove them from the cradle and grease them, this should resolve the problem.

Check engine silentblocks

Finally, last point that we can verify together, it is the engine silentblocks, in fact, these silentblocks act as pads/shock absorbers between the engine and the cradle of the car, a evident weakness of these will create a subsidence and therefore a space between the engine and the silentblocks, it may appear that a squeaking noise occurs when you pass a speed bumps or any holes with your Audi A4. To change them go to your mechanic.

Other speed bump noise Audi A4

If, even though all its assumptions, you still can’t locate the source of the noise your Audi A4 makes when you pass a speed bump, we encourage you to read this content on a loud noise on Audi A4 or to visit your auto technician in order to carry an in-depth check on your Audi A4 and discover this problem.