It is never pleasing to notice a sound you don’t know about, and which results from your car. Thus, what if you find an exhaust noise that remains on your BMW 3 Series? It is highly possible that this is a minimal problem, however, before being sure, it is better to carry out some inspections. Our team has produced this to help you solve it. First, we will look at the possible reasons if you have a muffled exhaust sound on your BMW 3 Series and second, if you have a metallic rattling noise on your BMW 3 Series.exhaust-noise-bmw-3-series

Muffled exhaust noise BMW 3 Series

Exhaust pipe with holes BMW 3 Series

Having a muffled sound from its exhaust is not insignificant and can lead to over-consumption, or a malfunction of the engine unit, which could in the end become dirty, for example. If you have an exhaust noise on your BMW 3 Series, it is plausible that it is due to a crack in the exhaust pipe, this is the most regular cause. To be able to verify this, position a friend or relative under the running motor car and accelerate to help them find the origin of the hole. Once discovered, if it is not too large you can cold seal it with specific metallic mastic type legs. Otherwise, the section will have to be changed.

Element dislocated exhaust pipe BMW 3 Series

The other possibility of being the subject of a muffled exhaust noise on BMW 3 Series is to have a part of the exhaust unit that has dislocated resulting from vibrations for example. In fact some junctions of the different parts of the pot can loosen along with time and cause an exhaust gas leak in places not intended for this goal. These fumes will then create a loud noise. Same technique as above, we go under the BMW 3 Series to define the problem place, and tighten or swap the bolts. If you hear a muffled sound but after examining it doesn’t seem to come from the pot itself, think about looking at this content which gives solutions gives solutions about rear end noises on BMW 3 Series.

Metal rattling exhaust sound BMW 3 Series

Damaged exhaust muffler noise BMW 3 Series

If, alternatively, you are exposed to an exhaust sound that is more of a metallic sort of, it is plausible that one or more parts of your exhaust may be weakened. Indeed, it is plausible that either your baffles, the catalyst or the silencer are the induce of this noise. To be certain, go under your BMW 3 Series, cold, and tap each of the previously stated parts with a hammer to define the source of the noise. You should move things between things in the problematic part, if they are baffles, you can try to push the section a little bit to try to block them and thus limit their movements. If it is a dead catalyst, it will be necessary to consider replacing it, as well as the silencer. In this case, to stop the exhaust noise on your BMW 3 Series, you will either have to find a resale one and do it yourself, or go to your auto technician.

Metal rattling exhaust noise BMW 3 Series : Silentblock, loose pot

Finally, a metallic exhaust noise on your BMW 3 Series may be connected to a poor attachment of your exhaust to your car. In fact, over time, vibrations, the pot fasteners on the car chassis can come off. In this case, you need to examine, when cold, that the pot holds well, to try to get it to move in different directions and watch how it behaves. Backwards there should be some play and be able to move but not too much. The closer you get to the engine motor, the more fixed it should be. Visually examine the fasteners for which you have doubts. Finally, it is possible that a silentbloc may have died . In this case it will have to be changed.