Finding out noises from your vehicle often is never comforting, so listening noises on your Lexus RX 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. In any case, it is important to check the cause and take the necessary actions to solve the issue, it is with this intention 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 cracking noise Lexus RX
Check Lexus RX suspension
If you experience a suspension noise when you pass a speed bump on your Lexus RX, and it is characterized 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 dead, 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 listen to the noise coming from your front axle as you circulate over holes. If it is indeed the cups, think of changing them as soon as possible or you may damage other parts and have to make more important auto repairs.
Check the cardan shaft
If you are here because you have looked for for “Lexus RX 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 In fact, when the cardan bellows get outdated and the dirt/dust builds up inside them their working is deteriorated and it is possible to experience a noise when they are in torsion.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 turn at low speed. If it cracks in these two situations you should consider swapping it or them. If you have the feeling that this noise is more like a a loud noise on Lexus RX, don’t hesitate to refer to this article.
Check steering hinges/stabilizer bar
Finally, when you find out a suspension noise when your Lexus RX passes over a speed bumps, it is plausible that the hinges or the stabilizer bar are responsible. Simply like the gimbals, the steering part is mobilized when you modify direction. If this is the situation, the components that may have been affected by regular 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, position it under the automobile and apply twists on each of its components to examine that there is no special play on one of them, they are supposed to resist you quite strongly over their entire travel. Remember to take your vehicle to your mechanic or swap them if they are involved.
squeaky noise speed bump Lexus RX
Check the stabilizer bar
If, on the other hand, you have a noise that is more like a squeak when you pass a speed bump with your Lexus RX, it is possible that it is the stabilizer bar itself that is concerned. In fact, abnormal/pronounced wear of the latter can cause irregular friction which can create this squeaking noise. Remember to examine by going under your automobile the condition of the paint on your bar which will tell us if there is friction. Second possible explanation, it may be your stabilizer bar silentblocks that are dry and create noise, in which case disassemble them from the cradle and grease them, this should resolve the issue.
Check engine silentblocks
Finally, last case that we can examine together, it is the engine silentblocks, actually, these silentblocks act as pads/shock absorbers between the engine and the cradle of the vehicle, a pronounced fatigue of these will make a subsidence and therefore a space between the engine and the silentblocks, it may happen that a squeaking noise comes up when you pass a speed bumps or any holes with your Lexus RX. To replace them go to your mechanic.
Other speed bump noise Lexus RX
If, despite all its assumptions, you still can’t uncover the origin of the noise your Lexus RX makes when you pass a speed bump, we encourage you to read this article on a loud noise on Lexus RX or to visit your mechanic in order to carry an in-depth check on your Lexus RX and identify this issue.
