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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Cosmetic Maintenance: Wash, Wax, Detailing, Repairs > Is the Front Windshield Upper Moulding Seal necessary?
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      11-02-2019, 07:12 PM   #1
Be_Em_Double_You
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Is the Front Windshield Upper Moulding Seal necessary?

I have a 2013 320D and when I bought it had the decaying front moulding seal which is common issue.

I have completely remove the upper and side moulding and cleaned as good as it can be and to be honest looks like it shouldn't even be there and looks ok without it. What is peoples on that? I have the replacement ready to go but I am hesitant as I feel at some point I will have to remove the new one due to the same issue.

I have driven the car at highway speed without and change in wind reduction, so is it even necessary to have it installed?

Thoughts?
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      11-02-2019, 07:21 PM   #2
Be_Em_Double_You
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      11-02-2019, 08:19 PM   #3
John in VA
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It's not uncommon for some seals & weatherstripping to deteriorate over time with sun, heat, chemicals, etc. It looks to me like something's missing on the car without the seals. If you've already purchased the replacements why not install them? It's your choice, ultimately.
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      11-02-2019, 09:03 PM   #4
Billfitz
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If it didn't serve a purpose BMW wouldn't have put it there. It should last the life of the car, but as I understand it from a friend in NZ you folks Down Under deal with a much higher level of UV than we do, so it's critical to treat anything that can degrade on a regular basis.
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      11-02-2019, 09:30 PM   #5
Be_Em_Double_You
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Quote:
Originally Posted by John in VA View Post
It's not uncommon for some seals & weatherstripping to deteriorate over time with sun, heat, chemicals, etc. It looks to me like something's missing on the car without the seals. If you've already purchased the replacements why not install them? It's your choice, ultimately.
Yes you are right. I have just finished fitting it and wasn't too hard and looks pretty good! until next time.
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      11-02-2019, 09:32 PM   #6
Be_Em_Double_You
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Quote:
Originally Posted by Billfitz View Post
If it didn't serve a purpose BMW wouldn't have put it there. It should last the life of the car, but as I understand it from a friend in NZ you folks Down Under deal with a much higher level of UV than we do, so it's critical to treat anything that can degrade on a regular basis.
Well it has been fitted now and your right it doesn't serve a purpose.. and what would you treat in regularly to prevent this happening from the UV?
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      11-03-2019, 07:49 AM   #7
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I use 303 Protectant on all my rubber parts, including the door/window weatherstripping and anything else that's rubbery.
https://www.goldeagle.com/product/30...ce-protectant/
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      04-01-2022, 07:31 AM   #8
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Quote:
Originally Posted by Be_Em_Double_You View Post
Yes you are right. I have just finished fitting it and wasn't too hard and looks pretty good! until next time.
Bringing back this post from the past -

Any advice on removal/replacement of the upper windshield seal? I've done it on the E90 but the F30 one is a fair bit smaller.
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