The air conditioner fan in the passenger's legs of the BMW 3 E90 needs to be lubricating at least 2-3 times a year or starts whistling. It's very easy to get to the fan-it just needs to roll the lid on four horseback, which is under the glove compartment. It is immediately followed by a fan. To get it, you need to disconnect the wires, scroll the fan counterclockwise, and pull it on.
The fan may be lubricating the ventilator, or aerosol WD aerosol, for all the seats. After all these manipulations, the fan needs to be properly installed.
