Which is the internal circulation button on BMW's AM?
2 Answers
On BMW, the 'M' button represents internal circulation, while 'A' stands for automatic switching between internal and external circulation, meaning the vehicle detects and controls the circulation mode itself. 'M' forces internal circulation, and when no light is on, it indicates external circulation. During summer when the air conditioning is on, it's advisable to use internal circulation. In heavy traffic during rush hours, especially in tunnels, internal circulation should be used as much as possible to prevent exhaust fumes or dust from entering. BMW is a German luxury car brand headquartered in Munich, Bavaria, Germany, and owns three brands: BMW, MINI, and Rolls-Royce. The car's logo features a blue and white pattern, representing the coat of arms of Bavaria, symbolizing BMW's pure Bavarian heritage.
Having driven a BMW for so many years, the recirculation button is usually located on the air conditioning control panel, featuring a small icon with an arrow inside the car or labeled "REC." It's positioned near the steering wheel or in the middle of the center console. Pressing it makes the air circulate inside the car, stopping the intake of outside air. This feature is especially useful on highways or when pollution is high outside, helping to avoid inhaling exhaust fumes or pollen. There are slight differences among BMW models—for example, the button is prominent and easy to find in the 3 Series, while in the 5 Series it might be integrated into a menu, and in the X Series, it’s just a few taps on the screen. I always pay attention to air quality while driving, especially turning on recirculation during smoggy weather to protect my health. However, avoid keeping it on for too long, as high humidity inside the car can fog up the windows. I usually switch back to fresh air mode every few hours. Regular maintenance of the air conditioning system also ensures the button functions properly.
