04-17-2021, 06:35 PM | #1 |
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CFRP roof of my M2 CS features a deformity - Replacement proposed
Hi everyone,
Just wanted to get some feedback and advice. I noticed today that the cfrp roof on my m2cs has a ripple/bulge deformity in it. It's hard to see in pictures but if you run your finger across the top of the roof you can definitely feel the bulge. Any other cs owners come across this? I park it in the garage at home and in a parking deck at work so it's not really exposed to any harsh conditions. I've made an appointment at my local bmw service center to get it checked out on Tuesday 04/20/21. I'll also try and call bmw USA customer support on Monday. I would think any repairs would be covered under warranty but it's scary to think that my whole roof might need to get replaced and I'm really bummed out about this. I'll follow up once I get more info from bmw. |
04-18-2021, 12:49 AM | #2 | |
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04-18-2021, 12:48 PM | #5 | |
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As the CS roof on the M2 CS is a structural part of the car, I doubt that it will be replaced. You don't want that. My guess: you will be told that there is no adverse functional impact and that it is what it is. Ask your dealer to check whether a "PuMA" exists about the M2 CS roof. A BMW "PuMA" = "Problem und Maßnahmenmanagement Aftersales" = "Problem and Measures management Aftersales" = a worldwide BMW database of all reported problems and most with the their appropriate fixes. It's BMW's online technical hotline for dealers. Info is considered to be confidential. If an issue is not reported yet, the dealer fills out a form for submittal to BMW's technical gurus and subsequently they send back a response outlining what BMW wants the dealer to do to fix the car. Sometimes it's "replace such-and-such" and sometimes they ask for more diagnostic info. Generally speaking, according to insider info, BMW is not amused about the outcome of the M2 CS roof, even to the point that it will never be used again on future BMW M cars. Let's see if BMW changes its mind over time.
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04-18-2021, 03:47 PM | #6 | |
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04-18-2021, 03:57 PM | #7 |
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04-18-2021, 06:34 PM | #9 |
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If it's not impacting the structure and the paint is fine, i'm not sure it's worth getting fixed as the only fix is replacing it. Replacing that roof, i'm not sure anyone knows right now if it's remotely possible without the car being declared totaled.
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04-18-2021, 06:43 PM | #10 | |
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04-18-2021, 07:00 PM | #11 |
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CF roof repair of an F82 M4 - According to the repair shop:
"After 8 years in business, I think we've finally found the absolute worst possible failure related to sun damage we've ever seen. What started as a small spot of blistering grew into what we'd consider a "catastrophic failure" of biblical proportions. After several years of exposure to solar radiation (UV Ray's), the top layer of the epoxy completely, and effortlessly, delaminated from the actual carbon fiber. Folks, we've NEVER seen a layer peel off with our fingers like this before and it came off as if it were a bad nail polish job, which is absolutely nuts. Stay tuned for the post-production fix."Part 1 (00:55): Part 2 (00:30): Part 3 (01:06): Part 4 (00:40): Delaminating CF - Some more:
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04-19-2021, 07:49 AM | #13 | |
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Uh oh. |
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04-19-2021, 07:57 AM | #14 | |
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04-19-2021, 08:03 AM | #15 |
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It would have to be that way from when the part was made. The piece would crack if that happened after the fact. I doubt there is anything wrong with the structure of it, or the car. It's just incredible the piece made it through QC
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04-19-2021, 08:04 AM | #16 |
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If you want the car new and there are none left.. It's irrelevant. You either keep the car with it or you don't and you don't have a M2CS.
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04-19-2021, 08:06 AM | #17 | |
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The big issue with carbon is once you get a rock strike through the epoxy, it's only a matter of time before you have complete delamination due to the fact that moisture is now getting into the entire panel underneath the epoxy. The UV only accelerates the process. |
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04-19-2021, 09:22 AM | #18 | ||
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04-19-2021, 09:23 AM | #19 | ||
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04-19-2021, 11:42 AM | #20 | |
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04-19-2021, 12:11 PM | #21 | |||
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