Post by
SteveTheTech »
https://forums.nicoclub.com/stevethetech-u103802.html
Thu Apr 09, 2009 2:08 pm
If you want to try to fix this yourself you will need to isolate the rattle to either a trim piece or the speaker. This can be done by applying firm pressure on the finisher around the window switch plate (only removable piece of the door finisher that may rattle). There is also a small cover behind the inside door handle that may cause a plastic on plastic rattle under some conditions. In either case trim noises can usually be resolved with a small piece of felt tape or suitable material to absorb the vibrations and dissipate them without transferring the harmonics onto the adjacent piece of plastic.
If that doesn't give you the source of the rattle the door finisher may need to be removed. This isn't very hard and if it comes to that I can give you a step by step tutorial. However if it turns out that it's the speaker on your nearest Infiniti dealer will be able to replace it under warranty.
Although the build quality of new Infinitis has increased significantly over the past few years and the interior appointments have as well and a positive result of that is decreased NVH (Noise Vibration and Harshness) concerns, but every car is just slightly different.
Oh and lastly check the door pockets for anything lying around in there that can move. Anything that isn't firmly secured can transmit virbation.