If you acknowledge a noise on your car, you are right to be careful of it and take it seriously, although it is possible that nothing critical will results, it is also possible that it is the symptom of a more important restoration. A noise that shows up in the trunk of your Mazda 3 is luckily more a indication of a small correction or restoration, rather than a difficult one. To help you in your research, we have decided to compose this content page to present you with the most likely solutions to your problem. First we will see that this trunk noise on your Mazda 3 can come from built up dirt, the problem 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 Mazda 3 : Built up dirt that causes poor closing
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We will therefore start with a trunk noise on your Mazda 3 created by dirt accumulated on your joints, lock for example. In fact, it is possible that on a car 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 problem causes a poor closure of the trunk and a noise that can sound like a crack. To check if you are in this situation, open the trunk of your Mazda 3, check the state of the gasket that goes 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 difference. 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 Mazda 3 that is relating to other origins such as shock absorbers, do not hesitate to have a look to this content page on the noises at the back of a Mazda 3.
Noise in the trunk of my Mazda 3 : Loose lock, clicking noise
Second possibility, you may also, over time, knowledge a locking system that has taken up some play. And this is one of the most probably alternatives. In fact, knowing a trunk noise on your Mazda 3 is very often relating to this problem. Different solutions are existing to you according to the level of play you have with your lock. The first is that quite often the offset is minimal and a simple greasing of the system with thick grease is enough 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 circumstance you would have to strip off the cover that will allow 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 check the centering of the striker in connection with the trunk lock. If after checking out the trunk of your Mazda 3 closes badly, it means that you have moved it too far, duplicate the process by pushing the striker less.
Noise in my trunk Mazda 3 : Rivet following plate swap in the trunk/ bumper
Finally, one of the last possibilities. It is that following a license plate swap you were unlucky and that a piece of rivet fell backside your plate. In fact, when a plate change is made, to remove the old one the technique used is to drill the existing rivets to be able to released the license plate. Unfortunately, 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 trigger an annoying noise. To check that it is this problem you are experiencing, and that you have a trunk noise on your Mazda 3 linked to a rivet, you will need to check that it is in the tailgate open it and stir it to define the noise. If this is your situation, 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 situation, you will have to remove the bumper to remove the bits of rivet that are running around.
