It is never enjoyable to find out a noise in your car that you don’t know the starting point of. So, what if you recognize a loud noise that is persistant on your Audi S4? It is extremely possible that this is a minor issue, but before beeing sure, it is better to complete some verifications. Whether that loud noise comes from the front of the vehicle, from the rear, whether it shows up when you accelerate or when you are parked, our team has created this article to help you fix it. First, we will point out the possible explanations for the trouble according to when loud noise shows up on your Audi S4, and then we will concentrate on the region of origin of the noise. In any case, if this noise continues, follow these advice to help you find the origin.
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When does my Audi S4 make a loud noise?
One way to discover a noise from your Audi S4 is to determine when it occurs. Indeed, some trouble can be related to parts that are only stressed under certain types of conditions. It is this technique that we will focus on in this first part.
Loud noise Audi S4 when accelerating
Loud noise on Audi S4 that occurs when you are accelerating can be symptomatic of multiple failures. In fact, if you encounter a noise that is louder and louder when you accelerate, it can come from a faulty turbo that will cause a much higher noise than during normal process. In addition, it is also highly possible that loud noise on your Audi S4 is in connection with a wheel bearing, which is one of the most common causes of these types of symptoms. Another possibility is that your exhaust pipe may have holes or a collar may have become loose. Finally, it is also possible that the issue may come from a deformed tire or an unbalanced wheel that will tend to vibrate as it gains speed.
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When my Audi S4 is stopped
If your Audi S4 makes a loud noise while not accelerating, engine on, the issue may be in connection with poor air intake. An air intake hose that has come loose or has a hole in it may be the reason.
Where does loud noise come from on my Audi S4 and how can I be sure of its origin?
Now that we have found the cause of the noise, we will look into the verification step to make sure that this is the issues you are experiencing.
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The loud noise comes from the wheels of my Audi S4
As we have seen earlier in this article, loud noise from the wheels of your Audi S4 may be in connection with two main problems. If it is one of your tired bearings, it will tend to make a thumping noise that intensifies when it is under stress (spins faster and faster). So remember to verify by driving “fast” (neutral gear on and window open to hear only the noise of the wheels) that the noise is located here, if this is the case change it or them as soon as possible. If it is a deformed tire, make sure to visually check the entire tread area for linearity. If it is the balancing of the wheels of your Audi S4 that is the trouble, you will tend to feel a vibration in the direction of the automobile as you go faster. In both situations, you will have to go to your mechanic to replace the tires or execute a balancing.
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The loud noise comes from the engine of my Audi S4
In case you have identified loud noise as coming from the engine of your Audi S4, the two most likely causes are turbo and air intake. In the first case, a turbo failure may also be associated with a compression loss during the engine ramp-up phase, so you should encounter a power loss during your acceleration. If the loud noise on your Audi S4 is related to air intake, the check will be done mainly visually, check all your air intake hoses by a visual control in your engine block to be sure that it is not damaged or disconnected which would induce an air intake, if it is just disconnected you can reconnect the air intake tubes yourself. Then verify that the engine idle speed is not random. In case you confirm one of these two disorders, take your automobile to your mechanic .
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Loud noise comes from the exhaust pipe of the vehicle
If the noise you have perceived comes from the exhaust pipe of your Audi S4, it is highly possible that you have rust if your vehicle is old and has created holes in it over time and therefore generates a very high noise close to aircraft noise on your Audi S4, that a part has been cut off due to wear, or, finally, that a clamp has become loose due to vibrations. To validate this, get help from someone who will stand under the vehicle while you accelerate to find the exact area of starting point of this noise. If it is a hole, you can repair it with a putty provided for this purpose, or, if it is a collar, “reattach” it. If it is cut or the hole is too big, it is better to get closer to your mechanic.
