If you pay attention to a noise on your automobile, you are right to be careful of it and take it seriously, although it is possible that nothing serious will happen, it is also possible that it is the signal of a more significant repair. A noise that happens in the trunk of your BMW 3 Series is luckily more a indicator of a small adjustment or restoration, rather than a complex one. To help you in your research, we have decided to write this content to present you with the most likely solutions to your issue. First we will see that this trunk noise on your BMW 3 Series can come from accumulated dirt, the issue can also come from a loose lock and finally, it can even come from a simple rivet that sits inside your bumper.
Noise in the trunk BMW 3 Series : Accumulated dirt that triggers poor closing
We will therefore start with a trunk noise on your BMW 3 Series triggered by dirt accumulated on your joints, lock for example. Indeed, it is possible that on a automobile that is already a few years old and whose cleaning is not always a priority or that the roads used are not very clean that dirt collects at the trunk gasket. This issue triggers a poor closure of the trunk and a noise that can sound like a crack. To verify if you are in this circumstance, open the trunk of your BMW 3 Series, verify the condition of the gasket that runs around the entire tailgate and clean it with a wet/soap cloth, dry the whole thing and try to close the trunk and take a dentred road to see the impact. If this is not the case, continue to the other hypotheses that will probably give a solution. It is possible however that you have a trunk noise on your BMW 3 Series that is relating to other origins such as shock absorbers, do not hesitate to read this content on the noises at the back of a BMW 3 Series.
Noise in the trunk of my BMW 3 Series : Loose lock, clicking noise
Second possibility, you may also, over time, encounter a locking system that became loose. And this is one of the most probably possibilities. Indeed, knowing a trunk noise on your BMW 3 Series is very often relating to this issue. Different solutions are available to you depending on the level of play you have with your lock. The first is that sometimes the offset is minimal and a simple greasing of the system with thick grease is appropriate to fix the trouble. Secondly, it is also possible that you really have a lot of play on your lock and that each time the trunk “jumps”, in which case you would have to strip off the cover that permits access to the lock (inside the trunk). Then, using torx screws, you unscrew the striker attached to the threshold, simply push it back a little towards the inside of the trunk and tighten it again. Make sure to verify the centering of the striker in relation to the trunk lock. If after checking the trunk of your BMW 3 Series closes badly, it means that you have moved it too far, repeat the procedure by pushing the striker less.
Noise in my trunk BMW 3 Series : Rivet following plate swap in the trunk/ bumper
Finally, one of the last possibilities. It is that following a license plate swap you were unfortunate and that a piece of rivet fell backside your plate. Indeed, when a plate replacement is made, to take out the old one the technique used is to drill the existing rivets to be able to released the license plate. Sadly, it can happen that part of the rivet falls into the hole of the bumper and it will therefore wander inside the bumper and can create an annoying noise. To check that it is this problem you are experiencing, and that you have a trunk noise on your BMW 3 Series linked to a rivet, you will need to verify that it is in the tailgate open it and stir it to discern the noise. If this is your case, you will have to remove the linings from the trunk to remove it. Finally, if it is your bumper, it is in this rarer and more unpleasant case, you will have to take out the bumper to remove the bits of rivet that are running around.