M40i Exhaust tips flaking

sinbad4 · 07-07-2020, 10:29 AM

Quote:

Originally Posted by 383vett

They replace the whole exhaust. Not just the tips.

Is it same as factory shipped.. or is inside different. One photo above showed grey interior paint. Can you verify? Same flat black or gloss grey or something else?

Bimmer100_ · 07-15-2020, 02:35 PM

I'm having the exhaust replaced under warranty. However my service advisor told me the exhaust needs to be cut. Is that correct?

ga9213 · 07-15-2020, 03:18 PM

From what I'm seeing the original factory exhaust has the resonator mid pipe and muffler section all welded together, whereas the replacement muffler section part includes a pipe clamp...so original exhaust would be cut and muffler section clamped over existing pipe.

Some folks are saying entire exhaust is replaced...but the only way they could be doing that is if the entire midpipe and muffler section of the exhaust were both replaced, which seems like unnecessary added expense and I wouldn't think BMW would approve that.

Bimmer100_ · 07-16-2020, 07:33 PM

The dealership replaced only one side muffler since the other side wasn't flaking. However in doing so the replacement muffler sticks out slightly further. Now I have to take it back in to have them adjust it.

R N M · 08-19-2021, 10:17 AM

Having this issue as well on my 2020.
Car is leased so I’m not going through hassle of fixing it.

Why is it only the left side flaking?

ridetime · 08-19-2021, 02:14 PM

Quote:

Originally Posted by bwsteg

The dealership replaced only one side muffler since the other side wasn't flaking. However in doing so the replacement muffler sticks out slightly further. Now I have to take it back in to have them adjust it.

I think we all agree this shouldn't happen but I'm not sure replacing the muffler is worth the potential of it happening again, or getting a muffler with other issues like tips that are crooked and require yet another service visit.

If it happens to mine I think I will spend a few minutes with some high heat flat black paint and call it good. If it peels in 6 months I will invest another 3 minutes. Some will say it's under warranty and I make BMW fix everything and that's fine too.

Itsmeagain · 08-21-2021, 08:19 AM

Quote:

Originally Posted by RocketRomeo

Correct- that's exactly what they're doing.

No damage caused by anyone, this is a brand new exhaust fitted a month ago. It would appear it's just a paint quality issue on this one.

Its good that they are changing it for you, hopefully the replacement will be ok

ga9213 · 09-14-2021, 01:44 PM

Replacement exhaust is flaking now too.

Dandle · 09-14-2021, 02:15 PM

Quote:

Originally Posted by ga9213

Replacement exhaust is flaking now too.

Mine too.

JJ 911SC · 09-14-2021, 06:24 PM

Quote:

Originally Posted by ga9213

Replacement exhaust is flaking now too.

Quote:

Originally Posted by Dandle

Mine too.

How long did it last?

Bestle · 09-14-2021, 06:52 PM

Every single car I've owned with black exhaust tips have flaked. It happened with my R8, C63 and judging by this thread, is potentially only a matter of time until it happens to my X3M

0KayBimm3r · 09-14-2021, 11:00 PM

Grill paint worked for me. Looks good and easy to apply and clean.

Dandle · 09-15-2021, 01:16 AM

Quote:

Originally Posted by JJ 911SC

How long did it last?

The first one was changed at a year and this one is about two years old and the l/h tip is now flaking.

ga9213 · 09-15-2021, 08:29 AM

Quote:

Originally Posted by JJ 911SC

How long did it last?

6 months. Winter did it in. Likely moisture getting in under the paint due to expansion and contraction along with dew. Probably will end up taking a rotary to it to scuff up the metal real good and then use a more durable paint in hopes that it sticks.

lfdal54 · 07-04-2022, 09:47 AM

Quote:

Originally Posted by ga9213

6 months. Winter did it in. Likely moisture getting in under the paint due to expansion and contraction along with dew. Probably will end up taking a rotary to it to scuff up the metal real good and then use a more durable paint in hopes that it sticks.

What's your paint of choice? I'm thinking Rustoleum flat engine black if I can find it. My 2019 x3 M40i has had it for about a year, starting at about 12k. I really don't want the dealership to touch an otherwise good exhaust system after the problems I had with the HPFP on my wife's diesel.

ga9213 · 07-08-2022, 11:39 AM

Quote:

Originally Posted by lfdal54

What's your paint of choice? I'm thinking Rustoleum flat engine black if I can find it. My 2019 x3 M40i has had it for about a year, starting at about 12k. I really don't want the dealership to touch an otherwise good exhaust system after the problems I had with the HPFP on my wife's diesel.

I'd probably opt for a BBQ paint that will hold up to heat. I'd sand down the metal and then clean with brake cleaner to get it nice and bare and ready for paint.

suby01 · 11-07-2022, 02:47 PM

Sad day for me.
My tips are flaking and it's pretty bad. Does anyone have detailed info to share on how to fix these ourselves?

I know BBQ paint or Rust Oleum but any prep, what did you use specifically?
Thanks!

PaulsX3M40i · 11-07-2022, 07:24 PM

I've removed the flaking paint on my 2018. Quite like the stainless look.

BigJoeyVtC23 · 09-25-2023, 12:24 PM

This happened to my 2021 X3 M40 (build Nov'20) with ~20k on it; BMW replaced the muffler under warranty (muffler & tips assembly is a single unit, they cut the old one off and attached the new one with clamps). Hopefully doesn't happen to the new one as well!

aashishamber · 10-18-2023, 02:09 PM

Quote:

Originally Posted by BigJoeyVtC84

This happened to my 2021 X3 M40 (build Nov'20) with ~20k on it; BMW replaced the muffler under warranty (muffler & tips assembly is a single unit, they cut the old one off and attached the new one with clamps). Hopefully doesn't happen to the new one as well!

Do you mind sharing your pics , how does the new one look like , is it chrome/steel or black in color ?

BigJoeyVtC23 · 10-20-2023, 09:58 AM

Mine are the shadowline/black. Don't have pics but looked really similar to the ones posted in this thread. Looks brand new now, with a flat black interior finish.

07-15-2020, 02:35 PM	#178
Bimmer100_ Captain 378 Rep 820 Posts Drives: 23 G80 M3 6SPD Join Date: May 2011 Location: Long Island iTrader: (12) Garage List 2007 335i Coupe 6MT [8.34] 2002 IBP IS300 5MT LSD [10.00]	I'm having the exhaust replaced under warranty. However my service advisor told me the exhaust needs to be cut. Is that correct? __________________ Acura RSX-S K24a2 JRSC Swap - SOLD CPO BMW 335i 6MT - SOLD
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07-15-2020, 03:18 PM	#179
ga9213 Lieutenant 365 Rep 533 Posts Drives: 2018 X3 M40i Join Date: Jun 2020 Location: Olathe, KS iTrader: (0)	From what I'm seeing the original factory exhaust has the resonator mid pipe and muffler section all welded together, whereas the replacement muffler section part includes a pipe clamp...so original exhaust would be cut and muffler section clamped over existing pipe. Some folks are saying entire exhaust is replaced...but the only way they could be doing that is if the entire midpipe and muffler section of the exhaust were both replaced, which seems like unnecessary added expense and I wouldn't think BMW would approve that.
	Appreciate 1 BMWZ41909.50 Quote

07-16-2020, 07:33 PM	#180
Bimmer100_ Captain 378 Rep 820 Posts Drives: 23 G80 M3 6SPD Join Date: May 2011 Location: Long Island iTrader: (12) Garage List 2007 335i Coupe 6MT [8.34] 2002 IBP IS300 5MT LSD [10.00]	The dealership replaced only one side muffler since the other side wasn't flaking. However in doing so the replacement muffler sticks out slightly further. Now I have to take it back in to have them adjust it. __________________ Acura RSX-S K24a2 JRSC Swap - SOLD CPO BMW 335i 6MT - SOLD
	Appreciate 0 Quote

08-19-2021, 10:17 AM	#181
R N M Colonel 3633 Rep 2,051 Posts Drives: F80 M3 Join Date: Apr 2009 Location: NYC iTrader: (0) Garage List 2016 BMW M3 [0.00]	Having this issue as well on my 2020. Car is leased so I’m not going through hassle of fixing it. Why is it only the left side flaking?
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09-14-2021, 01:44 PM	#184
ga9213 Lieutenant 365 Rep 533 Posts Drives: 2018 X3 M40i Join Date: Jun 2020 Location: Olathe, KS iTrader: (0)	Replacement exhaust is flaking now too.
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09-14-2021, 06:52 PM	#187
Bestle First Lieutenant 364 Rep 375 Posts Drives: F90 M5 LCI, Audi R8 Join Date: Apr 2021 Location: UK iTrader: (0)	Every single car I've owned with black exhaust tips have flaked. It happened with my R8, C63 and judging by this thread, is potentially only a matter of time until it happens to my X3M
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09-14-2021, 11:00 PM	#188
0KayBimm3r Enlisted Member 20 Rep 49 Posts Drives: BMW X3 M40i Join Date: Jul 2020 Location: Chicago iTrader: (1)	Grill paint worked for me. Looks good and easy to apply and clean.
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11-07-2022, 02:47 PM	#193
suby01 Cowboy Astronaut Millionaire 2314 Rep 2,885 Posts Drives: 2020 X3 M40i Join Date: Aug 2019 Location: CT, USA iTrader: (0)	Sad day for me. My tips are flaking and it's pretty bad. Does anyone have detailed info to share on how to fix these ourselves? I know BBQ paint or Rust Oleum but any prep, what did you use specifically? Thanks! __________________ The Youtubes https://youtu.be/gzinBJjxIUY Insta https://www.instagram.com/gatosandturbos/
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11-07-2022, 07:24 PM	#194
PaulsX3M40i New Member 41 Rep 29 Posts Drives: BMW X3 M40i Join Date: May 2021 Location: United Kingdom iTrader: (0)	I've removed the flaking paint on my 2018. Quite like the stainless look. Attached Images
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09-25-2023, 12:24 PM	#195
BigJoeyVtC23 2021 X3 M40i 2 Rep 38 Posts Drives: 2021 X3 M40i Join Date: Oct 2019 Location: MA iTrader: (0)	This happened to my 2021 X3 M40 (build Nov'20) with ~20k on it; BMW replaced the muffler under warranty (muffler & tips assembly is a single unit, they cut the old one off and attached the new one with clamps). Hopefully doesn't happen to the new one as well!
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10-20-2023, 09:58 AM	#197
BigJoeyVtC23 2021 X3 M40i 2 Rep 38 Posts Drives: 2021 X3 M40i Join Date: Oct 2019 Location: MA iTrader: (0)	Mine are the shadowline/black. Don't have pics but looked really similar to the ones posted in this thread. Looks brand new now, with a flat black interior finish.
	Appreciate 0 Quote