M2 m performance rear diffuser cloudy carbon

matt_junglist · 03-01-2020, 07:43 AM

Hi, was washing my car today and noticed patches of my m performance rear diffuser are starting to go cloudy/milky beneath the clear coat. Anyone else had similar problem or got any deas on how to get rid of it?

Annoyingly car is just out of 3 year warranty otherwise would push for a replacement with bmw

nioh_lbbm2 · 03-01-2020, 07:53 AM

Is it genuine?

How long have you had the piece?

Do you regularly wax or have it ceramic coated?

matt_junglist · 03-01-2020, 08:03 AM

Yeah its genuine, was on the car when I brought it from a bmw dealer but have the original invoice from bmw for the supply and installation.

I've have the car for 1 year, but it's been on the car for just over 3 years.

Its coated with gtechniq exo.

Any ideas?

medphysdave · 03-01-2020, 08:22 AM

It almost looks like the carbon is separating from the resin internally or there is movement and there is stress in that area that's stretching the resin. Either way it seems like a defect to have BMW address.

matt_junglist · 03-01-2020, 08:30 AM

Thanks, do you think I'll have any luck with bmw to sort this? It's outside the 3 year manufacturer warranty but actually like a week within the 12 month bmw used car warranty. Not sure exactly what exclusions the used car warranty has if I'm honest. Im in the uk if that makes any difference

nioh_lbbm2 · 03-01-2020, 09:33 AM

Quote:

Originally Posted by matt_junglist

Thanks, do you think I'll have any luck with bmw to sort this? It's outside the 3 year manufacturer warranty but actually like a week within the 12 month bmw used car warranty. Not sure exactly what exclusions the used car warranty has if I'm honest. Im in the uk if that makes any difference

Can't hurt to try

medphysdave · 03-01-2020, 09:36 AM

I would argue that if you have a bumper to bumper warranty that includes paint defects etc, then this would fall under that. I would also think BMW might want to replace this part as a courtesy to their brand. This is assuming it's a factory defect.

DanG · 03-01-2020, 09:36 AM

BMW warranty is four years on the M2. If the part was port installed it should be covered by the four year warranty.

matt_junglist · 03-01-2020, 10:28 AM

Thanks I'll give it a go.

We only get 3 year warranty in the uk unfortunately, but its still just within the 12 month approved used car bmw warranty so I'll try and argue it under that as it doesnt specifically say it excludes paint deffects or anything

dtmurf · 03-01-2020, 01:52 PM

I can't say I've seen that before. It does look like the resin is showing through but I'm surprised that the resin is white in the first place. I think it's pretty unusual so maybe BMW will be interested in investigating what's going on with it. Good luck with the dealer!

Killed by Death · 03-01-2020, 02:46 PM

Can't hurt to ask, BMW might want it back to examine what went wrong.

detroitm2 · 03-01-2020, 07:11 PM

I'd take it in. Worst they can do is deny the claim.

If you have a good dealership they may push it through warranty anyways.

medphysdave · 03-01-2020, 07:35 PM

Did this happen suddenly? Wonder if somehow someone hit the diffuser and caused it to flex in those spots. I would think it would crank though if that happened.

matt_junglist · 03-02-2020, 06:46 AM

Noticed a couple of weeks ago that thought it was a bit dull in patches but didn't think much of it at the time thought it was just some surface contamination, but obviously got a lot worse since then.

Pretty sure no one has hit it as no cracks or marks.
I'm taking it to dealer tomorrow so hopefully they will sort it

xxyion · 03-02-2020, 03:44 PM

This is normal for any sort of carbon fiber product. Its the product of sun damage on the clearcoat. There are products that can help reduce damage like what you are putting on, but as you said it was on the car for 2 years prior before you owned the car. The previous owned probaly didnt think to protect it from sun damage.

infinitekidM2C · 03-02-2020, 04:20 PM

Starting to look like snake skin lol

Economatic · 03-02-2020, 05:30 PM

Quote:

Originally Posted by infinitekidM2C

Starting to look like snake skin lol

Maybe it's molting so it can be an M4?

matt_junglist · 03-05-2020, 11:59 AM

So, took it in to the dealer who had a look and couldn't work out what was causing it and hadn't seen anything similar before. No stone chips or cracks so not water ingress, so they took some photos to see what they could do.

They got back to me today and have had it approved by bmw to replace

On a separate note, also confirmed definitely not morphing in to an m4!

medphysdave · 03-05-2020, 03:05 PM

Excellent News!

LuvMyE92 · 03-10-2020, 02:44 PM

Great news! Sometimes BMW does come through for the customer.

dtmurf · 03-11-2020, 02:44 PM

Excellent! I hope they fit it for you too as getting the old one off can be a bitch.

matt_junglist · 03-11-2020, 04:13 PM

Yeah there fitting it next week for me. Really impressed with the dealer I brought the car from, so much better than other bmw dealers I have dealt with in the past. Makes a pleasant change

03-01-2020, 07:43 AM	#1
matt_junglist New Member 36 Rep 17 Posts Drives: M2 Join Date: Sep 2017 Location: Reading iTrader: (0)	M2 m performance rear diffuser cloudy carbon Hi, was washing my car today and noticed patches of my m performance rear diffuser are starting to go cloudy/milky beneath the clear coat. Anyone else had similar problem or got any deas on how to get rid of it? Annoyingly car is just out of 3 year warranty otherwise would push for a replacement with bmw Attached Images
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03-01-2020, 07:53 AM	#2
nioh_lbbm2 Lieutenant Colonel 1717 Rep 1,899 Posts Drives: M2 Join Date: Mar 2018 Location: California iTrader: (0)	Is it genuine? How long have you had the piece? Do you regularly wax or have it ceramic coated?
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03-01-2020, 08:03 AM	#3
matt_junglist New Member 36 Rep 17 Posts Drives: M2 Join Date: Sep 2017 Location: Reading iTrader: (0)	Yeah its genuine, was on the car when I brought it from a bmw dealer but have the original invoice from bmw for the supply and installation. I've have the car for 1 year, but it's been on the car for just over 3 years. Its coated with gtechniq exo. Any ideas?
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03-01-2020, 08:22 AM	#4
medphysdave Brigadier General 4554 Rep 4,665 Posts Drives: M2 CS \| 85 of 592 Join Date: Apr 2015 Location: Charlotte, NC iTrader: (3)	It almost looks like the carbon is separating from the resin internally or there is movement and there is stress in that area that's stretching the resin. Either way it seems like a defect to have BMW address.
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03-01-2020, 08:30 AM	#5
matt_junglist New Member 36 Rep 17 Posts Drives: M2 Join Date: Sep 2017 Location: Reading iTrader: (0)	Thanks, do you think I'll have any luck with bmw to sort this? It's outside the 3 year manufacturer warranty but actually like a week within the 12 month bmw used car warranty. Not sure exactly what exclusions the used car warranty has if I'm honest. Im in the uk if that makes any difference
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03-01-2020, 09:36 AM	#7
medphysdave Brigadier General 4554 Rep 4,665 Posts Drives: M2 CS \| 85 of 592 Join Date: Apr 2015 Location: Charlotte, NC iTrader: (3)	I would argue that if you have a bumper to bumper warranty that includes paint defects etc, then this would fall under that. I would also think BMW might want to replace this part as a courtesy to their brand. This is assuming it's a factory defect.
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03-01-2020, 09:36 AM	#8
DanG Major General 10629 Rep 6,930 Posts Drives: 2018 M2 AW DCT Join Date: Aug 2012 Location: Seattle, WA iTrader: (1) Garage List 2018 BMW M2 [7.68]	BMW warranty is four years on the M2. If the part was port installed it should be covered by the four year warranty.
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03-01-2020, 10:28 AM	#9
matt_junglist New Member 36 Rep 17 Posts Drives: M2 Join Date: Sep 2017 Location: Reading iTrader: (0)	Thanks I'll give it a go. We only get 3 year warranty in the uk unfortunately, but its still just within the 12 month approved used car bmw warranty so I'll try and argue it under that as it doesnt specifically say it excludes paint deffects or anything
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03-01-2020, 01:52 PM	#10
dtmurf Captain 480 Rep 757 Posts Drives: M2 Join Date: Nov 2016 Location: PNW iTrader: (0) Garage List 1996 BMW 318is [4.75] 2012 Audi Q5 [4.50] 2017 BMW M2 [10.00]	I can't say I've seen that before. It does look like the resin is showing through but I'm surprised that the resin is white in the first place. I think it's pretty unusual so maybe BMW will be interested in investigating what's going on with it. Good luck with the dealer! __________________ '17 M2 DCT Long Beach Blue
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03-01-2020, 02:46 PM	#11
Killed by Death Brigadier General 12412 Rep 3,516 Posts Drives: '23 X3 M40i Join Date: Aug 2017 Location: North Carolina iTrader: (0)	Can't hurt to ask, BMW might want it back to examine what went wrong.
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03-01-2020, 07:11 PM	#12
detroitm2 Colonel 2428 Rep 2,526 Posts Drives: 2018 M2 Join Date: Aug 2018 Location: Michigan iTrader: (2) Garage List 2018 BMW M2 [0.00]	I'd take it in. Worst they can do is deny the claim. If you have a good dealership they may push it through warranty anyways. __________________ 2018 M2 - Daily Driver/Track Car Motorcity BMWCCA Member Instagram \| YouTube
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03-01-2020, 07:35 PM	#13
medphysdave Brigadier General 4554 Rep 4,665 Posts Drives: M2 CS \| 85 of 592 Join Date: Apr 2015 Location: Charlotte, NC iTrader: (3)	Did this happen suddenly? Wonder if somehow someone hit the diffuser and caused it to flex in those spots. I would think it would crank though if that happened.
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03-02-2020, 06:46 AM	#14
matt_junglist New Member 36 Rep 17 Posts Drives: M2 Join Date: Sep 2017 Location: Reading iTrader: (0)	Noticed a couple of weeks ago that thought it was a bit dull in patches but didn't think much of it at the time thought it was just some surface contamination, but obviously got a lot worse since then. Pretty sure no one has hit it as no cracks or marks. I'm taking it to dealer tomorrow so hopefully they will sort it
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03-02-2020, 03:44 PM	#15
xxyion Captain 761 Rep 786 Posts Drives: 2024 M4 Competition xDrive Join Date: Dec 2019 Location: Fremont CA iTrader: (0)	This is normal for any sort of carbon fiber product. Its the product of sun damage on the clearcoat. There are products that can help reduce damage like what you are putting on, but as you said it was on the car for 2 years prior before you owned the car. The previous owned probaly didnt think to protect it from sun damage.
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03-02-2020, 04:20 PM	#16
infinitekidM2C Major General 4207 Rep 5,728 Posts Drives: 2019 M2 Competition Join Date: Nov 2007 Location: Orange County, CA iTrader: (4) Garage List 2019 M2 COMPETITION [9.50] 2008 135i (my old car) [7.39]	Starting to look like snake skin lol
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03-05-2020, 11:59 AM	#18
matt_junglist New Member 36 Rep 17 Posts Drives: M2 Join Date: Sep 2017 Location: Reading iTrader: (0)	So, took it in to the dealer who had a look and couldn't work out what was causing it and hadn't seen anything similar before. No stone chips or cracks so not water ingress, so they took some photos to see what they could do. They got back to me today and have had it approved by bmw to replace On a separate note, also confirmed definitely not morphing in to an m4!
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03-05-2020, 03:05 PM	#19
medphysdave Brigadier General 4554 Rep 4,665 Posts Drives: M2 CS \| 85 of 592 Join Date: Apr 2015 Location: Charlotte, NC iTrader: (3)	Excellent News!
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03-10-2020, 02:44 PM	#20
LuvMyE92 Occasionally frequent poster 3000 Rep 2,744 Posts Drives: CT5V-Blackwing Join Date: Jan 2008 Location: RTP NC, USA iTrader: (0)	Great news! Sometimes BMW does come through for the customer. __________________ Current inventory: F22 & G05 Cadillac CT5-V Blackwing w/3 pedals Past: E24,E28(3),E34,E36,E37,E38(2),E39(4),E46,E89,E92 (obviously),F01,F06,F10,F30,F87,G12,G30(2),G82(2)
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03-11-2020, 02:44 PM	#21
dtmurf Captain 480 Rep 757 Posts Drives: M2 Join Date: Nov 2016 Location: PNW iTrader: (0) Garage List 1996 BMW 318is [4.75] 2012 Audi Q5 [4.50] 2017 BMW M2 [10.00]	Excellent! I hope they fit it for you too as getting the old one off can be a bitch. __________________ '17 M2 DCT Long Beach Blue
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03-11-2020, 04:13 PM	#22
matt_junglist New Member 36 Rep 17 Posts Drives: M2 Join Date: Sep 2017 Location: Reading iTrader: (0)	Yeah there fitting it next week for me. Really impressed with the dealer I brought the car from, so much better than other bmw dealers I have dealt with in the past. Makes a pleasant change
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