Auto opening and closing grill

[Edgie7]

Can someone please enlighten me on how the auto grill system is supposed to work?
My 2018 M40i has this system fitted but I don't recall seeing it closed
I understood that it closed during cold weather to allow the engine to warm up quicker.

[Greydog]

Hi John

I thought the active grill shutter system was there to improve aerodynamic efficiency but as I have not seen one to play with I could well be wrong 😁

If you have no warnings showing and haven't noticed an increase in Fuel use the only way to check will be by diagnostics Dealer costs will be high but you should find a BMW Specialist near you who has BMW ISTA and can run a check at a reasonable cost. If repairs are needed sensors, actuators or Control unit my advice would be get the part numbers and search the internet for the best supply options

Dave

 

[Edgie7]

Hi Dave

Thank you. I will give the guy who looks after my car and get it booked in for a diagnosis. No warning lights and to be honest I haven't noticed an increase in fuel usage either.

My daughter has a 2025 BMW and the grill on that certainly opens and closes.

I will post the outcome for my car once it's been looked at.

Thanks again for your help