F36 Radiator lower air duct plastic piece

obzen · 05-10-2021, 09:55 AM

Yesterday I noticed a plastic piece hanging behind the lower mesh of my msport bumper (infront of the lower radiator). Looks like its some sort of Air Duct?
Basically the middle piece had broken from the one side so I ripped it off and pulled it out. I think I identified the part as BMW Engine Air Duct 51747290609 / 51747290609, here's a picture from eBay listing. the bottom middle part of the plastic had broken off because its only held on my a few plastic points to the rest of the plastic?

Anyone know what this middle piece's function is? is it a crucial piece that serves important function? Will the car live without it?

will post more pics of the car later

Solidjake · 05-13-2021, 09:35 AM

To maintain airflow into the intercooler. If that piece is not there air would go all over the place around the intercooler and reduce cooling efficiency and increase drag.

obzen · 06-11-2021, 04:59 PM

Quote:

Originally Posted by Solidjake

To maintain airflow into the intercooler. If that piece is not there air would go all over the place around the intercooler and reduce cooling efficiency and increase drag.

This picture is a better representation of what's happening. since the middle plastic piece is gone the two sides are hanging down now, I can imagine its not as aerodynamic.

It looks like a pain in the ass to fix I bet the dealers going to want my left arm

05-10-2021, 09:55 AM	#1
obzen Lieutenant 188 Rep 424 Posts Drives: 2017 BMW 440i Gran Coupe Join Date: Jun 2020 Location: Chicago iTrader: (1)	F36 Radiator lower air duct plastic piece Yesterday I noticed a plastic piece hanging behind the lower mesh of my msport bumper (infront of the lower radiator). Looks like its some sort of Air Duct? Basically the middle piece had broken from the one side so I ripped it off and pulled it out. I think I identified the part as BMW Engine Air Duct 51747290609 / 51747290609, here's a picture from eBay listing. the bottom middle part of the plastic had broken off because its only held on my a few plastic points to the rest of the plastic? Anyone know what this middle piece's function is? is it a crucial piece that serves important function? Will the car live without it? will post more pics of the car later Attached Images __________________ //'17 F36 440i Mineral Grey //MPPSK w/carbon tips //Apex ARC8 255/40/18 //MST intake //AutoTechnik brace Last edited by obzen; 05-10-2021 at 10:09 AM..
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05-13-2021, 09:35 AM	#2
Solidjake ¯\_(ツ)_/¯ 945 Rep 1,762 Posts Drives: '13 328i Msport 6MT Join Date: Jun 2009 Location: NYC/SNJ iTrader: (2)	To maintain airflow into the intercooler. If that piece is not there air would go all over the place around the intercooler and reduce cooling efficiency and increase drag. __________________ Tensioner/belt DIY \| Side skirt extension DIY Apex SM-10/DWS06+ \| 400m/X-ice Xi3 \| Injen Exhaust \| Stoptech SS Lines \| 335 Front Brakes Hawk HPS 5.0 \| RBF600 \| ER Charge Pipes \| Wagner Evo Comp 2 FMIC
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