It is rarely pleasing to find out a sound you don’t know about, and which results from your car. Thus, what if you discover an exhaust noise that persists on your BMW i3? It is highly possible that this is a small problem, however, before being sure, it is better to conduct some investigations. Our team has written this to support you fix it. First, we will look at the possible reasons if you have a muffled exhaust sound on your BMW i3 and second, if you have a metallic rattling noise on your BMW i3.
Muffled exhaust noise BMW i3
Exhaust pipe with holes BMW i3
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 time become dirty, for example. If you have an exhaust noise on your BMW i3, it is possible that it is due to a crack in the exhaust pipe, this is the most regular cause. In order to confirm this, position a friend or relative under the running motor vehicle and accelerate to help them discover the starting point 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 i3
The other possibility of being the subject of a muffled exhaust noise on BMW i3 is to have a part of the exhaust device that has dislocated caused by vibrations for example. Indeed some junctions of the different parts of the pot can loosen after a while and generate an exhaust gas leak in places not intended for this goal. These fumes will then produce a loud noise. Same technique as above, we go under the BMW i3 to define the problem location, and tighten or swap the bolts. If you hear a muffled sound but after checking it doesn’t seem to come from the pot itself, think about having a look at this document which gives answers gives solutions about rear end noises on BMW i3.
Metal rattling exhaust sound BMW i3
Damaged exhaust muffler noise BMW i3
If, on the other hand, you are exposed to an exhaust sound that is more of a metallic type, it is possible that one or more parts of your exhaust may be broken. Indeed, it is possible that either your baffles, the catalyst or the silencer are the reason of this noise. To be certain, go under your BMW i3, 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 i3, you will either have to find a resale one and do it yourself, or go to your mechanic.
Metal rattling exhaust noise BMW i3 : Silentblock, loose pot
Finally, a metallic exhaust noise on your BMW i3 may be linked to a poor attachment of your exhaust to your vehicle. Indeed, over time, vibrations, the pot fasteners on the vehicle chassis can come off. In this case, you need to check, when cold, that the pot holds well, to try to get it to move in different directions and watch how it responds. Backwards there should be some play and be able to move but not too much. The closer you get to the engine unit, the more fixed it should be. Visually check 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.
