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Posted

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.

Posted

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

 

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