Recirculate Air Button

Marcoose · Post by **Marcoose** » Tue Oct 26, 2021 1:50 am

Hey now! California has happy cows. Their farts smell far nicer than British cows.

ronk · Post by **ronk** » Tue Oct 26, 2021 8:43 pm

Every day is a school day!
Ive had a a couple of E89s over the years and never notice the re circulate button on the steering wheel.

I probably will never ever use it either.

Kiwi_Mike · Post by **Kiwi_Mike** » Wed Oct 27, 2021 1:39 am

Pondrew wrote: ↑Mon Oct 25, 2021 9:20 pm did you know

No I didn't know that. I don't really know much about what goes on with my headlights as I cant see them from the drivers seat, I just leave them on auto. I do know tho that I've got one white angel eye and one yellow one. Something I've been meaning to sort out but cant find H8 bulbs in my neck of the woods.

flybobbie · Post by **flybobbie** » Wed Oct 27, 2021 7:52 am

Recirculate is supposed to detect dodgy smells and operate, wonder how that works. Is it just passing or by passing the charcoal filter?
The auto A and manual, anyone ever noticed a difference.

B21 · Post by **B21** » Wed Oct 27, 2021 8:41 am

There is an air quality sensor in the engine bay under the scuttle deck, that sends a signal to the heating / cooling ECU which commands recirculating mode if the mode button is on auto.

The steers wheel button manually overrides that system.

colb · Post by **colb** » Wed Oct 27, 2021 9:48 am

The ACU sensor (Stink Sensor) is at the front of the car under the front panel is clipped in front of the radiator, its a small black square box. Inside is a small sensor (FIGARO TGS 822) that detects traffic fumes when it smells fumes it closes the flap to stop fresh air being drawn into the vent system, a small foam sits inside the housing in front of the sensor that acts as a filter. If it fails it sets a code you will see when the car is scanned. A BMW replacement costs approx £76. The sensor inside is a push fit into the body of the sensor unit and can be bought from electronic parts suppliers for circa £17.
https://www.rapidonline.com/Catalogue/S ... o%20TGS822
The old sensor will most likely be broken when its pulled out of the housing but the replacement simply plugs in just remember which way the old one was fitted in the housing so the pin positions end up in the correct holes.

B21 · Post by **B21** » Wed Oct 27, 2021 9:58 am

colb wrote: ↑Wed Oct 27, 2021 9:48 am The ACU sensor (Stink Sensor) is at the front of the car under the front panel is clipped in front of the radiator, its a small black square box. Inside is a small sensor (FIGARO TGS 822) that detects traffic fumes when it smells fumes it closes the flap to stop fresh air being drawn into the vent system, a small foam sits inside the housing in front of the sensor that acts as a filter. If it fails it sets a code you will see when the car is scanned. A BMW replacement costs approx £76. The sensor inside is a push fit into the body of the sensor unit and can be bought from electronic parts suppliers for circa £17.
https://www.rapidonline.com/Catalogue/S ... o%20TGS822
The old sensor will most likely be broken when its pulled out of the housing but the replacement simply plugs in just remember which way the old one was fitted in the housing so the pin positions end up in the correct holes.

I think you are maybe referring to an E85?

The OP has an E89..

Picture shows location for US/EU cars..UK cars on opposite side ..

colb · Post by **colb** » Wed Oct 27, 2021 11:25 am

Yes that was for E85 most probably same sensor inside on the E89 if you can open it up and have a look.

Roddy · Post by **Roddy** » Sat Nov 20, 2021 7:56 am

While driving today I decided to check that recirculate air button on the wheel, and yes it did work...... it also switched from my Android auto google maps to the BMW standard iDrive menu! Just to make sure I hadn't gone mad, I tried it several times

Anyone with the MMI unit installed, try it

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