Under side rust starting

canadianE92m3 · 06-25-2019, 08:33 PM

I noticed some rust forming under my M3. Should I be concerned at all?

I live on the west coast so it shouldn't get much worse but I feel like I should at least try and minimize the growth while it's still minor.

Anybody else deal with this?

See the pics I attached.

amrazM · 06-25-2019, 09:29 PM

Surface corrosion on the subframe. I powder coated mine because of this.

canadianE92m3 · 06-25-2019, 10:07 PM

Quote:

Originally Posted by amrazM

Surface corrosion on the subframe. I powder coated mine because of this.

How has the powder coat held up? Stopped it from growing?

amrazM · 06-25-2019, 10:27 PM

I’m not sure the process but the surface rust is removed. My underbody was coated in certain spots with por15 to avoid corrosion also.

canadianE92m3 · 06-25-2019, 10:29 PM

Quote:

Originally Posted by amrazM

I’m not sure the process but the surface rust is removed. My underbody was coated in certain spots with por15 to avoid corrosion also.

How much did that cost? If you don't mind me asking.

Thanns

amrazM · 06-26-2019, 01:40 AM

Quote:

Originally Posted by canadianE92m3

How much did that cost? If you don't mind me asking.

Thanns

$250 the por15 I did myself

canadianE92m3 · 06-26-2019, 01:41 AM

Quote:

Originally Posted by amrazM

Quote:

Originally Posted by canadianE92m3

How much did that cost? If you don't mind me asking.

Thanns

$250 the por15 I did myself

That's good to hear so I have a comparison. I'll probably do the same to be honest. Thanks

msan · 06-26-2019, 08:59 AM

Quote:

Originally Posted by amrazM

$250 the por15 I did myself

You got the subframe r&r for $250? Or the $250 just for the powder coat and you diy the r&r?

Have an x5 I might need this for the rear subframe so I’m curious.

doogee · 06-26-2019, 09:04 AM

The subframes on these cars are very poorly painted from the factory. You can see rust on them when they're brand new from the dealer.

canadianE92m3 · 06-27-2019, 06:42 PM

Quote:

Originally Posted by doogee

The subframes on these cars are very poorly painted from the factory. You can see rust on them when they're brand new from the dealer.

Yeah, I'm not overly concerned as this is the only rust besides the differential I can find. I'm probably just going to prep it then POR 15. Hopefully it turns out good.

Drifter2090 · 07-03-2019, 12:40 PM

Every E9X or E9XM I've seen in Canada has had rust like this on the sub-frame, it's just surface rust.

06-25-2019, 08:33 PM	#1
canadianE92m3 New Member 3 Rep 14 Posts Drives: 2013 BMW M3 6MT Join Date: Jun 2019 Location: British Columbia iTrader: (0)	Rust Prevention? I noticed some rust forming under my M3. Should I be concerned at all? I live on the west coast so it shouldn't get much worse but I feel like I should at least try and minimize the growth while it's still minor. Anybody else deal with this? See the pics I attached. Attached Images
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06-25-2019, 09:29 PM	#2
amrazM mTekMods 2142 Rep 2,902 Posts Drives: like a granny. Join Date: Jan 2010 Location: Manhatan iTrader: (1)	Surface corrosion on the subframe. I powder coated mine because of this.
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06-25-2019, 10:27 PM	#4
amrazM mTekMods 2142 Rep 2,902 Posts Drives: like a granny. Join Date: Jan 2010 Location: Manhatan iTrader: (1)	I’m not sure the process but the surface rust is removed. My underbody was coated in certain spots with por15 to avoid corrosion also.
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06-26-2019, 09:04 AM	#9
doogee Major 748 Rep 1,256 Posts Drives: '08 M3, '09 328xi Sport Wagon Join Date: Oct 2008 Location: Ancaster, ON, Canada iTrader: (0)	The subframes on these cars are very poorly painted from the factory. You can see rust on them when they're brand new from the dealer. __________________
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07-03-2019, 12:40 PM	#11
Drifter2090 Colonel 910 Rep 2,091 Posts Drives: E90 M3 \| E92 335i \| E90 335d Join Date: Jul 2015 Location: Ontario, Canada iTrader: (1)	Every E9X or E9XM I've seen in Canada has had rust like this on the sub-frame, it's just surface rust. __________________ MGM F82 M4 DCT / MPerformance / Swift / CSF / IND / Turner / BimmerWorld BSM F87 M2 6MT / Fabspeed / MPerformance / Turner / AutoID - SOLD JB-NB E92 M3 6MT / IND / RTD / Alpine / KW / ActiveAutowerke / 360Carbon - SOLD SS2-FR E90 M3 6MT / IND / AFE / ActiveAutowerke - SOLD AW-FR E90 M3 DCT / ACM / IND / AutoTecknic / K&N / H&R / Bilstein - SOLD
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