Arm
Posts: 178
Joined: Tue Jan 07, 2020 5:53 pm

Front Radiator Louvers?

Sat Oct 16, 2021 7:40 pm

Hey folks. Have any of you noticed the difference between REx and BEV models lower front air dam louvers?

I noticed today that my 2018 BEV has what looks like automatically controlled airflow louvers that looked like they were almost fully closed off during charging while my 2019 REx has no louvers at all.

See the images below:

2018 BEV
https://photos.app.goo.gl/ZJMFG4EqbEpQVpWp7

2019 REx
https://photos.app.goo.gl/61fo75s6nY2cS32KA

alohart
Posts: 2461
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Front Radiator Louvers?

Sat Oct 16, 2021 10:22 pm

These louvers are a mystery to me. Our 2014 BEV doesn't have louvers while a fellow i3 owner's 2019 BEV has them. Maybe someone can explain what they do and why some i3's have them and some don't.

Your photos show that only the lower 2 of the grill's 3 horizontal rows are open on BEV's whereas all 3 horizontal grill rows are open on REx models. This must be due to the greater need for cooling air when the REx engine is running. On those i3's with louvers, they must be controlling the flow of cooling air. Closed louvers likely decrease aerodynamic drag a bit.
Last edited by alohart on Sat Oct 16, 2021 10:30 pm, edited 1 time in total.
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

Arm
Posts: 178
Joined: Tue Jan 07, 2020 5:53 pm

Re: Front Radiator Louvers?

Sat Oct 16, 2021 10:25 pm

alohart wrote:
Sat Oct 16, 2021 10:22 pm
These louvers are a mystery to me. Our 2014 BEV doesn't have louvers while a fellow i3 owner's 2019 BEV has them. Maybe someone can explain what they do and why some i3's have them and some don't.
That would be interesting. It's definitely active because I looked really closely and the louver ends have angle markers on them...0 to 90 degrees.

frictioncircle
Posts: 196
Joined: Fri Nov 25, 2016 11:23 pm
Location: USA West Coast

Re: Front Radiator Louvers?

Mon Oct 18, 2021 10:09 pm

This is really interesting!

BMW loves to PR the heck out of every technical feature so I'm surprised they didn't make a point about this "Active Aero Cooling" tech! :D

OLDBMWGUY
Posts: 22
Joined: Tue May 28, 2019 12:32 am
Location: Honolulu, Hawaii

Re: Front Radiator Louvers?

Tue Oct 19, 2021 4:35 pm

With a 2019 BEV I have found that to get the the vanes in an open position so I can examine the condenser area, I have to start the I3 and turn on A/C full with the temperature set to the lowest level (I think it is 60 degrees). After about after 1-2 minutes of this, I shut the car off without changing any of the A/C settings, get out to look and the vanes are open. My experience has been that they will stay in the open position until you restart the I3.

Note: This is with the ambient temperature here usually in the 80's, your results may vary if attempting this procedure in colder weather.
2019 i3 BEV, Capparis White, Tera World, Harmon Kardon Audio System, 19 inch 429 wheels

Arm
Posts: 178
Joined: Tue Jan 07, 2020 5:53 pm

Re: Front Radiator Louvers?

Tue Oct 19, 2021 4:39 pm

OLDBMWGUY wrote:
Tue Oct 19, 2021 4:35 pm
With a 2019 BEV I have found that to get the the vanes in an open position so I can examine the condenser area, I have to start the I3 and turn on A/C full with the temperature set to the lowest level (I think it is 60 degrees). After about after 1-2 minutes of this, I shut the car off without changing any of the A/C settings, get out to look and the vanes are open. My experience has been that they will stay in the open position until you restart the I3.

Note: This is with the ambient temperature here usually in the 80's, your results may vary if attempting this procedure in colder weather.
So clearly it's a BEV feature...the REX has a different vaneless system.

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