[rotts4u]

Originally Posted by iBeech

I used some CarPlan tyre shine in the seal, and job DONE. no more ratteling- Thank you so very much for this tip- i have no idea why applying this spray to this seal would rectify ratteling noises- but hey, its done it.

Thanks

Is this still working for you?

[Smogmonster]

Thanks very much DJRG!

My 2018 328d is not my every day ride and had been sitting for extended periods between drives. Recently I started to get rattling from all four doors. I was planning to bring it in to my local BMW dealer to address the issue but first I thought I would do a little online research. I had no idea that the door seals could cause suck a ruckus.

After reading the previous posts I went out to the car and treated both the door and frame seals with a good amount of Formula 303 Aerospace Protectant. I also treated the door seal just above the rubber seal at the top of each door. Held my breath and went for a test drive... silent! Went out again two hours later and all is still quiet. Great!

As another poster suggested, I am going to leave my doors open for a few hours to decompress my seals. I don't know if this will help or not but it can't hurt.

Thanks to all for your input and suggestions.