Anyone had fitment problem with Kohlenstoff diffuser?

wstan1101 · 01-10-2017, 11:07 AM

Bought one on this forum from other folk. I got it yesterday and brought it to my local bodyshop ASAP. They told me the fitment is not good. The right side is fine, the hole is on the right place so they can put screw in it, but the edges are not parallel. The left is opposite, the edges are parallel, however the holes are not on the right places. I contact the seller and he told me the fitment is perfect on his m3. Im kinda confused...is this because mine is a m4? Or the fitment is just bad? I wonder anyone has same problem?

Blksnowflake · 01-10-2017, 02:37 PM

On my M3 it fits perfect. The only issue was I needed double sided tape on the part dehind the wheel to remove the gap.
My buddy had it on his M4, don't think this is specific to a model.

Spoolin Montego · 01-10-2017, 08:13 PM

M3 and m4 have the same bumper covers

dr.mba · 01-10-2017, 08:28 PM

Could possibly be shipping related. Just a thought

M

wstan1101 · 01-12-2017, 08:19 PM

Quote:

Originally Posted by Blksnowflake

On my M3 it fits perfect. The only issue was I needed double sided tape on the part dehind the wheel to remove the gap.
My buddy had it on his M4, don't think this is specific to a model.

Thanks, Im going to autotalent and let them help me fix it

AlterZgo · 01-13-2017, 01:16 PM

I don't think the F80 M3 and F82 M4 has the same rear bumper covers. While the rear diffuser section is identical and diffusers and exhausts can generally be exchanged between M3 and M4, for the diffusers that extend out to the right and left sides of the rear bumper, there could be differences. Remember that M3 rear bumper has a flare out to blend in with the flared rear wheel wells whereas m4 rear bumper does not flare out but has more of a coke bottle widening to match the M4 rear wheel well:

01-10-2017, 11:07 AM	#1
wstan1101 Enlisted Member 4 Rep 30 Posts Drives: M4 Join Date: Dec 2016 Location: CA iTrader: (1)	Anyone had fitment problem with Kohlenstoff diffuser? Bought one on this forum from other folk. I got it yesterday and brought it to my local bodyshop ASAP. They told me the fitment is not good. The right side is fine, the hole is on the right place so they can put screw in it, but the edges are not parallel. The left is opposite, the edges are parallel, however the holes are not on the right places. I contact the seller and he told me the fitment is perfect on his m3. Im kinda confused...is this because mine is a m4? Or the fitment is just bad? I wonder anyone has same problem? Attached Images
	Appreciate 0 Tweet Quote

01-10-2017, 02:37 PM	#2
Blksnowflake Mlightened 1852 Rep 2,242 Posts Drives: Yaz M3 Join Date: Jan 2015 Location: TX iTrader: (1)	On my M3 it fits perfect. The only issue was I needed double sided tape on the part dehind the wheel to remove the gap. My buddy had it on his M4, don't think this is specific to a model.
	Appreciate 0 Quote

01-10-2017, 08:13 PM	#3
Spoolin Montego Captain 601 Rep 871 Posts Drives: 16 m3/20 x5m/23 m3 Join Date: Mar 2012 Location: Orange County iTrader: (1)	M3 and m4 have the same bumper covers
	Appreciate 0 Quote

01-10-2017, 08:28 PM	#4
dr.mba Captain 275 Rep 722 Posts Drives: 2017 F. Grey M3 ZCP Join Date: Apr 2011 Location: Canada iTrader: (0)	Could possibly be shipping related. Just a thought M
	Appreciate 0 Quote

01-13-2017, 01:16 PM	#6
AlterZgo Lieutenant Colonel 1538 Rep 1,665 Posts Drives: 23 X3 M40i, 21 911S, 24 Taycan Join Date: Sep 2010 Location: Gilbert, AZ iTrader: (0)	I don't think the F80 M3 and F82 M4 has the same rear bumper covers. While the rear diffuser section is identical and diffusers and exhausts can generally be exchanged between M3 and M4, for the diffusers that extend out to the right and left sides of the rear bumper, there could be differences. Remember that M3 rear bumper has a flare out to blend in with the flared rear wheel wells whereas m4 rear bumper does not flare out but has more of a coke bottle widening to match the M4 rear wheel well:
	Appreciate 0 Quote