BMW windshield

dhogan12 · 05-14-2007, 03:08 PM

Is there a difference between BMW windshield glass and a replacement windshield? Ever since I have had my windshield replaced my rain sensor has not worked as well.

ejazbmw · 05-14-2007, 03:11 PM

are u sure it was a OEM windshield i just got my replaced and it works like it did before....

droptop335 · 05-14-2007, 03:19 PM

Quote:

Originally Posted by dhogan12

Is there a difference between BMW windshield glass and a replacement windshield? Ever since I have had my windshield replaced my rain sensor has not worked as well.

Yes, there IS a difference, it's about $400...

canucklion · 05-14-2007, 03:21 PM

read his post carefully, he is saying he DOESN'T have the OEM one

that being said, the windshield replacement guy told me that there's no difference, just the price and the BMW logo on the OEM glass

Quote:

Originally Posted by ejazbmw

are u sure it was a OEM windshield i just got my replaced and it works like it did before....

Stronie · 05-14-2007, 03:37 PM

Ask "Got F1" he knows all about it. Works for Nationwide.
There are no aftermarket windshield manufacturers for BMW.

Safelite or any other company get the glass from the same place as BMW does with logos and everything same glass.

I've been through this with the driver side window.

tjnptel1 · 05-14-2007, 04:03 PM

how does a rain sensor really work? that thing is puzzling.

Dmitriy@AUTOcouture · 05-14-2007, 04:12 PM

Quote:

Originally Posted by tjnptel1

how does a rain sensor really work? that thing is puzzling.

Don't quote me on this, but this is the basic principle:

2 sensors pointing at the glass. 1 is send, the other is recieve. the SEND flashes a instant burst of infrared light and is bounced of the windshield into the RECIEVE. The computer calculates the time it took for the flash to get from point A to point B. If there is an obstruction (a rain drop in this case), then it reduces the time it takes for that flash of light to get to the recieve sensor, and as a result the computer activates the appropriate speed for the wipers accordingly.

Correct me if I'm wrong BTW.

-Dmitriy

FotiosF90M5 · 05-14-2007, 04:14 PM

Bmw uses pilkington for the glass.There is no difference between the two other than the symbol.

tjnptel1 · 05-14-2007, 04:20 PM

Quote:

Originally Posted by shpuntik

Don't quote me on this, but this is the basic principle:

2 sensors pointing at the glass. 1 is send, the other is recieve. the SEND flashes a instant burst of infrared light and is bounced of the windshield into the RECIEVE. The computer calculates the time it took for the flash to get from point A to point B. If there is an obstruction (a rain drop in this case), then it reduces the time it takes for that flash of light to get to the recieve sensor, and as a result the computer activates the appropriate speed for the wipers accordingly.

Correct me if I'm wrong BTW.

-Dmitriy

makes sense. it's pretty amazing stuff. and pretty darn accurate.

droptop335 · 05-14-2007, 04:51 PM

Quote:

Originally Posted by shpuntik

Don't quote me on this, but this is the basic principle:

2 sensors pointing at the glass. 1 is send, the other is recieve. the SEND flashes a instant burst of infrared light and is bounced of the windshield into the RECIEVE. The computer calculates the time it took for the flash to get from point A to point B. If there is an obstruction (a rain drop in this case), then it reduces the time it takes for that flash of light to get to the recieve sensor, and as a result the computer activates the appropriate speed for the wipers accordingly.

Correct me if I'm wrong BTW.

-Dmitriy

You may actually be right, but I don't understand how it would work. Both sensors are on the INSIDE of the glass, so water droplets would not interfere with the transimssion and reception of the IR beam, would they?

E90330iS · 05-14-2007, 05:14 PM

Interesting topic...

Mike UK · 05-14-2007, 06:17 PM

It is to do with reflective properties of glass. In fibre optic cables, light will bounce off the sides of the glass cable at small angles down the fibre optic cable unless it hits it above a certain angle (say for example 90 degrees). The same principle is being used with the windscreen. signal is sent and bounces off edge of glass into receiver. But if there is water at the point of the glass where the signal hits, the signal will pass straight through the glass, hence the signal will not be received and the wiper will be set off.

My physics is a bit rusty

If it aint working properly but the same glass is used, I would say that the signal/ receiver is broken, or the glass isnt a snug fit as it was IMO

EHDEN · 05-14-2007, 06:52 PM

Quote:

Originally Posted by canucklion

read his post carefully, he is saying he DOESN'T have the OEM one

that being said, the windshield replacement guy told me that there's no difference, just the price and the BMW logo on the OEM glass

there's def a difference. Always ask for the original with the logo on the windshield. they say that for selling points...

05-14-2007, 03:08 PM	#1
dhogan12 Registered 0 Rep 1 Posts Drives: 2006 325I Join Date: May 2007 Location: Fayetteville, North Carolina iTrader: (0)	BMW windshield Is there a difference between BMW windshield glass and a replacement windshield? Ever since I have had my windshield replaced my rain sensor has not worked as well.
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05-14-2007, 03:11 PM	#2
ejazbmw blahhh 304 Rep 6,355 Posts Drives: 2014 M235I Join Date: Apr 2007 Location: NJ/NY iTrader: (7)	are u sure it was a OEM windshield i just got my replaced and it works like it did before....
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05-14-2007, 03:37 PM	#5
Stronie Major 314 Rep 1,453 Posts Drives: 2017 F80M3 Comp. 6MT Join Date: May 2006 Location: Instagram: @Atlantis_S55 iTrader: (0)	Ask "Got F1" he knows all about it. Works for Nationwide. There are no aftermarket windshield manufacturers for BMW. Safelite or any other company get the glass from the same place as BMW does with logos and everything same glass. I've been through this with the driver side window.
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05-14-2007, 04:03 PM	#6
tjnptel1 Cunning Linguist 149 Rep 2,219 Posts Drives: 335i Join Date: Apr 2007 Location: Norfolk, VA iTrader: (0) Garage List 2007 335i [0.00]	how does a rain sensor really work? that thing is puzzling. __________________ Bottles are for babies, Real men get blown.
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05-14-2007, 04:14 PM	#8
FotiosF90M5 ///M Specialist South Shore BMW 772 Rep 7,108 Posts Drives: 2021 M5 Comp BHG/Silverstone Join Date: Jan 2007 Location: South Shore, MA iTrader: (62)	Bmw uses pilkington for the glass.There is no difference between the two other than the symbol. __________________ 2021 M5 COMPETITION LCI Brands Hatch Gray on SIlverstone, carbon roof, comp wheels, Mperf splitter, carbon pro spoiler, carbon diffuser , carbon paddles, executive pkg. Dinan HAS, RaceChip, dinan spacers, FC stud kit, etc
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05-14-2007, 05:14 PM	#11
E90330iS Major General 143 Rep 6,333 Posts Drives: BMW M4 Join Date: Jan 2006 Location: Arcadia, California iTrader: (56) Garage List 2006 330i [0.00]	Interesting topic... __________________ 2017 BMW M4 DCT Lease Transfer: https://f80.bimmerpost.com/forums/sh...8#post23736398
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05-14-2007, 06:17 PM	#12
Mike UK Private First Class 7 Rep 196 Posts Drives: Le mans Blau e92 Join Date: Apr 2006 Location: UK iTrader: (0)	It is to do with reflective properties of glass. In fibre optic cables, light will bounce off the sides of the glass cable at small angles down the fibre optic cable unless it hits it above a certain angle (say for example 90 degrees). The same principle is being used with the windscreen. signal is sent and bounces off edge of glass into receiver. But if there is water at the point of the glass where the signal hits, the signal will pass straight through the glass, hence the signal will not be received and the wiper will be set off. My physics is a bit rusty If it aint working properly but the same glass is used, I would say that the signal/ receiver is broken, or the glass isnt a snug fit as it was IMO
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