It is never pleasant to hear a sound in your car that you don’t know the cause of. So, what if you find a loud noise that persists on your Peugeot 407? It is very plausible that this is a minor problem, but before beeing sure, it is better to operate some checks. Whether that loud noise comes from the front of the vehicle, from the rear, whether it appears when you accelerate or when you are parked, our team has written this content to help you solve it. First, we will detail the possible causes for the problem according to when loud noise appears on your Peugeot 407, and then we will focus on the region of origin of the noise. In any case, if this noise continues, follow these suggestions to help you find the origin.
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When does my Peugeot 407 make a loud noise?
One way to find a noise from your Peugeot 407 is to establish when it shows up. Indeed, some problems can be linked to components that are only stressed under certain types of conditions. It is this technique that we will focus on in this first part.
Loud noise Peugeot 407 when accelerating
Loud noise on Peugeot 407 that happens when you are accelerating can be symptomatic of several failures. Indeed, if you feel a noise that is louder and louder when you accelerate, it can come from a faulty turbo that will provoke a much higher noise than during normal operation. Additionally, it is also highly plausible that loud noise on your Peugeot 407 is linked to a wheel bearing, which is one of the most common causes of these types of signs of illness. Another possibility is that your exhaust pipe may have holes or a collar may have become loose. Finally, it is also plausible that the problem may come from a deformed tire or an unbalanced wheel that will tend to vibrate as it increases speed.
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When my Peugeot 407 is stopped
If your Peugeot 407 makes a loud noise while not accelerating, engine on, the problem may be related to 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 Peugeot 407 and how can I be sure of its origin?
Now that we have identified the source of the sound, we will deal with the verification stage to make sure that this is the issues you are going through.
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The loud noise comes from the wheels of my Peugeot 407
As we have seen previously, loud noise from the wheels of your Peugeot 407 may be related to two main disorders. 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 examine 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 right away. If it is a deformed tire, remember to visually check the entire tread area for linearity. If it is the balancing of the wheels of your Peugeot 407 that is the problem, you will tend to feel a vibration in the direction of the automobile as you go faster. In both cases, you will have to go to your mechanic to swap the tires or do a balancing.
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The loud noise comes from the engine of my Peugeot 407
In case you have recognized loud noise as coming from the engine of your Peugeot 407, 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 Peugeot 407 is related to air intake, the control 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 cause an air intake, if it is just disconnected you can reconnect the air intake tubes yourself. Then examine that the engine idle speed is not random. In case you confirm one of these two problems, take your automobile to your garage .
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Loud noise comes from the exhaust pipe of the vehicle
If the noise you have detected comes from the exhaust pipe of your Peugeot 407, it is highly plausible 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 Peugeot 407, that a part has been cut off due to wear, or, finally, that a clamp has become loose due to vibrations. To ensure this, get help from someone who will stand under the vehicle while you accelerate to find the exact area of source 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.
