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Old 11-05-2011, 03:12 PM   #16
SamE30e
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I've never seen it happen before. There is some pressure on the edges to create a seal and prevent leaks. Not saying the antenna caused it, but it didn't help. Like I said I've never seen a car come in with that before.

It take's ALOT of force to break that glass, something had to have hit it. You can bounce a hammer off car glass. Anyone ever try to break a car window with a hammer?
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Old 11-05-2011, 07:19 PM   #17
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Quote:
Originally Posted by SamE30e View Post
I've never seen it happen before. There is some pressure on the edges to create a seal and prevent leaks. Not saying the antenna caused it, but it didn't help. Like I said I've never seen a car come in with that before.

It take's ALOT of force to break that glass, something had to have hit it. You can bounce a hammer off car glass. Anyone ever try to break a car window with a hammer?
Sam that makes sense and this is the excuse/pretense that all BMW techs give to everyone that brings in their car due to this issue BUT it is a common/known problem on E90post
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Old 11-05-2011, 08:06 PM   #18
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There is a considerable amount of E92's out there, and a shop would see a lot more then a forum would.

I'm not saying it's not common, but with the plethora of E92's I see every day, I'm saying I've yet to see one with a shattered sunroof.

And it's not BMW tech's decisions, if they had their choice they'd put a sunroof in it everytime. It has to do with the big cheeses.
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Old 11-05-2011, 09:18 PM   #19
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Quote:
Originally Posted by SamE30e View Post
There is a considerable amount of E92's out there, and a shop would see a lot more then a forum would.

I'm not saying it's not common, but with the plethora of E92's I see every day, I'm saying I've yet to see one with a shattered sunroof.

And it's not BMW tech's decisions, if they had their choice they'd put a sunroof in it everytime. It has to do with the big cheeses.
Makes sense. Here's a list of the ones that I've searched and found (not all are E92). I wouldn't be surprised if the OP shows all these threads, he could get SOME sort of compensation or investigation done.

http://www.e90post.com/forums/showth...unroof+explode

http://www.e90post.com/forums/showth...unroof+explode

http://www.e90post.com/forums/showth...unroof+explode

http://www.e90post.com/forums/showth...unroof+explode

http://www.e90post.com/forums/showth...unroof+explode

http://www.e90post.com/forums/showth...unroof+explode

http://www.e90post.com/forums/showth...unroof+explode

http://www.e90post.com/forums/showth...unroof+explode

http://www.e90post.com/forums/showth...unroof+explode
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Old 11-05-2011, 10:50 PM   #20
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if i were you, i'd remove it before bringing the car to bmw for inspection. Don't give them any excuses.
'
couldn't agreee anymore
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Old 11-05-2011, 10:59 PM   #21
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I remember 7 years ago, someone coming into a BMW dealership that I use to work for and told him that his sunroof on his 528i exploded while driving. The dealership laughed him out of the building. If only they/he knew then what we know now - the customer was telling the truth the whole time. wow
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Old 11-06-2011, 12:21 AM   #22
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Originally Posted by SamE30e View Post
I've never seen it happen before. There is some pressure on the edges to create a seal and prevent leaks. Not saying the antenna caused it, but it didn't help. Like I said I've never seen a car come in with that before.

It take's ALOT of force to break that glass, something had to have hit it. You can bounce a hammer off car glass. Anyone ever try to break a car window with a hammer?
Sunroof is NOT the same! Very easy to brake, I did one by mistake... And I know how much it takes to brake a side glass!
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Old 11-06-2011, 09:22 PM   #23
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Jim .E.:

Thanks for taking the time to find all those links. I found the video in the first link especially interesting because of the professor's conclusion that it was a manufacturing defect and because the car in the video is the same year and model as mine. I'm going to reference the links and the video during my discussions with BMW.

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Old 11-07-2011, 09:46 AM   #24
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I'd talk to your service manager about it. Their the one who will be able to do something, if anything. If not, then BMW Canada.
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Old 11-07-2011, 03:40 PM   #25
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This is EXTREMELY common in E9X cars.. lol they are winners.. sexy valve cover gasket designs and mint sunroof styling.

I'm always cringing on the freeway just waiting for it to happen to me..
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Old 11-07-2011, 07:35 PM   #26
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This is EXTREMELY common in E9X cars.. lol they are winners.. sexy valve cover gasket designs and mint sunroof styling.

I'm always cringing on the freeway just waiting for it to happen to me..
Valve covers aren't an issue on the direct injected cars, as much as it is on the N52 and N52k. The Direct Injected cars have carbon issues, injectors, hpfp's and wastegate issues. As long as you're in warranty you're fine.
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Old 11-11-2011, 07:57 PM   #27
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I dropped the car off at BMW Toronto last Saturday morning and they were very good to deal with. They told me they would report the incident to BMW Canada on Monday to see if it would be repaired as a warranty item.

On Monday morning, I composed an email using some of the relevant links uncovered by maXbimmer Forum members, and sent it to the Assistant Service Manager:

Raffi:

Thanks for taking the time to get my car booked in for service on Saturday without an appointment. Enterprise Rental Car was fast and courteous and they gave me a rental car at your discount rate.

In regards to my damaged car, I think that BMW should fix the defective sunroof under warranty. Here is my rational:

1. There was no obvious external cause before the explosion. No bump, no rock, no pothole, it was a normal Friday afternoon drive home from work. To recap, I was driving the car down the Gardiner Expressway just after 5:00 p.m. on Friday November 4, 2011 when the sunroof exploded over my head. I was going about 90kph, the sunroof and windows were closed, there was no overpass overhead, it was 9 degrees celsius outside, and I did not hit a bump or experience anything unusual just before it happened.

2. The physics of a rock hit don't work. Here is a video showing another 2010 BMW 328i with an exploding sunroof. The professor in the video explains that the angle and location of the sunroof do not allow a rock to hit it hard enough to break unless the glass is defective.

http://abclocal.go.com/wls/story?sec...ide&id=8026317

From the news report: 7 On Your Side then discussed this incident with Tarek Zohdi, a professor of mechanical engineering at UC Berkeley. He calculated a rock lofted into the air by a vehicle tire would reach a height of 10-15 feet and would have to come down at 70-80 miles an hour to break the sunroof.
"There is not a chance in the world that an unintentional rock that is lofted by a vehicle would ever break a sunroof panel," Zohdi said.

Zohdi says the maximum velocity of a rock coming down would be 25 miles an hour, well short of the needed 70 miles an hour. He said it is more likely the sunroof broke due to the stress caused by changes in temperatures or from fatigue.

"In both cases I would say in my opinion the car manufacturer has the problem; basically it's a manufacturers defect," Zohdi said.

3. There are a number of similar occurrences to other BMW's. You told me that you had only ever seen it with a seven series but here are links to the first five that I found for three series BMW's:

http://www.e90post.com/forums/showthread.php?t=515758

http://www.e90post.com/forums/showthread.php?t=489058

http://www.e90post.com/forums/showthread.php?t=67304

http://www.e90post.com/forums/showthread.php?t=531825

http://www.e90post.com/forums/showthread.php?t=76971

The BMW in the video above is not included in this list.

In summary, I'd like this fixed under warranty because I think that the sunroof glass was defective in my car. BMW will be able to get trace data from their supplier and I expect that there are other cars build with the same glass batch as mine that have had a similar defect. A new car should simply not experience this type of component failure.

If BMW does not agree, I would like a contact there that I can talk to.

Thank you again for your assistance on Saturday.

Dave Black

Here are some photos of my car right after I pulled over on Lakeshore Blvd. I think you'll agree that the car and the incident are almost identical to the exploding sunroof in the video above.
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Old 11-11-2011, 08:02 PM   #28
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Here is the cost of replacing a sunroof.

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Old 11-11-2011, 08:23 PM   #29
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BMW Toronto came through!

The dealership called yesterday and they said that BMW Canada had denied the warranty claim but that BMW Toronto had decided to repair the damage free of charge as a good will gesture. The only cost I had to pay was my rental car fee while it was being repaired.

I am extremely happy with the service that I got from BMW Toronto.

I dealt with Sheldon Ashley (service advisor), Raffi Kerametlian (assistant service manager), and Mark Glyn-Williams (service manager) and found them all to be professional, knowledgeable, and easy to deal with.

I picked up my car tonight and it looks terrific. They fixed the sunroof and cleaned the car up inside and out.

Thanks to everyone for your assistance.

Here are some photos after the repair.









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Old 11-11-2011, 08:37 PM   #30
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Wow, good on BMW Toronto to do that!
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