What is this black thing underneath front bumper

[Beem_mup]

well I am searching for the same thing and if it is posted properly here it will hopefully serve someone else in the future.

Just trying to contribute. Why are you lurking round posting on this thread and it is dead and you have nothing useful to contribute?

[1MOREMOD]

Originally Posted by Dashman

Lurking...

no need to get cranky

i know you have been waiting for someone to bump this thread dont lie.

[lsmkr01]

Originally Posted by Beem_mup

23 51757896420 ENGINE BAY EMI INSULATION TIP, RIGHT

source penske Auto parts. Will be happy to support our vendors, but how about more information and less guessing on the part of posters.

It says EMI insulation. So it insulates the EMI, whatever the hell that is. I will google it now that I now it is supposed to sheild something.

83 bucks at penske. I will get it from getbmwparts

I just had to by this part for the passenger side as well as the wheel well cover because since the EMI insulation tip was ripped off the cover was loose and the tire wore a big hole through it! 83 from dealer 67 from getbmwparts.com for EMI tip, 60 from dealer 48 from getbmwparts.com for the cover and a few bucks for the fasteners. Could have saved 15 bucks (28 minus 13 for shipping) picking them up online but since I was in for service it was easier to get them at the dealer.

[SilentAttack]

2 year bumps still help though!

[Krockit1]

Originally Posted by swamp2

The parts serve multiple purposes:

-Aerodynamics (small effect)
-Keep water and debris from getting thrown up into the lower front engine compartment area
-A close off of an airflow area to insure proper underhood flow and cooling

They are easy to damage even being really careful. I wrote up a post here with a nice quick/dirty repair guide to fix them rather than replace when damaged.

I had a semi in front of me blow out a trailer tire on the interstate and a piece of it caught this very part, the right insulation tip and tore it right off- it was trashed. The center insulation shield got tortured, too, torn on the end where the tip clips into it. Ordered the parts 3 weeks ago and STILL waiting for them. Talked to one of the techs at the dealer and he claims this does exactly what the above quote says. The air flow this tray system directs is supposedly maximizing brake cooling. My M's MY 2010 and the part is made of hard plastic.

[Craigy]

Hey guys, two questions:

1) What is the part number or how do I find the appropriate screws/fasteners for this cover?

2) Which one is "LEFT" and "RIGHT"? Is left the driver's side/port side, and right starboard side? Just want to make sure

Thanks y'all!

[foam]

Originally Posted by Craigy

Hey guys, two questions:

1) What is the part number or how do I find the appropriate screws/fasteners for this cover?

2) Which one is "LEFT" and "RIGHT"? Is left the driver's side/port side, and right starboard side? Just want to make sure

Thanks y'all!

I just replaced my "RIGHT" side which is the passenger side. "LEFT" would be the drivers side.

[Craigy]

Originally Posted by foam

I just replaced my "RIGHT" side which is the passenger side. "LEFT" would be the drivers side.

Thanks!! Looks like I need to order a right.

Sorry for the inane question, all the parts diagrams show the left parts on the right, and vice versa

Just ordered one. Now I need to figure out the fasteners/clips.

[miamiflgator]

Another bump
Could you share the fastener and clips part numbers please?

Originally Posted by Craigy

Thanks!! Looks like I need to order a right.

Sorry for the inane question, all the parts diagrams show the left parts on the right, and vice versa

Just ordered one. Now I need to figure out the fasteners/clips.

[g222leav]

After a harsh winter here in Chicago, both my right and left parts are gone. Gonna have to replace these too.

[miringrains]

I always thought it was to stop things from hitting the front wheel that are airbourne..

[M3-S65]

Per BMW after sales training PDF:

IT has a picture with the underbody panelling including what looks like this portion and states...

Other underbody panelling

The underbody panels have been optimized
to ensure the best possible vehicle
aerodynamics and the maximum possible
cooling capacity for the driveline components.

http://www.e90fanatics.com/pdf/BMW-M...nformation.pdf

[JabzSA]

Whether they serve a function (I am assuming they do) - or not, is for me irrelevant. I just hate the unsightly look of them once they are damaged.

I just replace the left and right and center module this weekend as they were cracked when i bought the car.

[Craigy]

Originally Posted by miamiflgator

Another bump
Could you share the fastener and clips part numbers please?

Hey sorry for the delay.

The screws are common across most models it appears. I ended up getting them off an ebay auction with these search terms and they were a perfect match: "bmw screw 4.8 X 16 mm" They're the black screws with washers attached.

The clips I believe are already attached to your replacement part. If they're missing then you might have some luck on ebay etc. I can't imagine they would be M3 or even 3 series specific.

[Yay-Z]

Just noticed my passenger side one was dragging on the floor. So gonna have to do this soon as well.

Dealer tried to get me to pay $600 to replace them

[Beemdog]

I read back through this old thread, found a lot of questions about what these engine bay EMI insulation pieces do (other than aerodynamics). "EMI" is electromagnetic interference. These "felt" pieces are carbon impregnated and serve as part of the shield for radio frequency emissions leaving the engine compartment and also for preventing RF interference from disturbing sensitive circuits (Eg. CANBUS) in the engine compartment.

During development, cars are measured at an EMI test facility to determine if they meet the various requirements for radiated high frequency noise and also their susceptability to external signals. I suspect the 3-series cars failed some tests without these added shielding parts.

[preppy]

Yeah...I've totally destroyed my drivers side one...good to know it's not that expensive to replace.

[phrozen06]

http://www.ecstuning.com/BMW-E92-M3-...Kit/ES2763340/

[Shaung]

It's designed to scrape on any small inclines to let you know that you may be going up a hill. That's what it does for me.

[xixp]

Hi,

Ive been looking for the PN of these flaps pieces in front of front wheels for my 2011 335 IS C (it comes with the M package ) without success.

Any idea what they might be?

are they in the drawing of below link? (I don't recognize anything that looks like flaps)

http://www.realoem.com/bmw/showparts...60&hg=51&fg=75


Thanks in advance!

[AlpinaBlueF02]

Just a basic air deflector

[granttalkiem3]

I have proceeded to taking mine off underneath my car along with everything else under the motor. While some people have been telling me I could be throwing off the undercarriage aerodynamics, I have seen a drastic Decrease in oil temps while operating intensely. Longer to get hot, quicker to cool down.