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Holy Smoke – give my BMW some breathing room

Written by maryp posted on Thursday, October 8th, 2009

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A few posts ago, we reminded anyone driving in the area of the wild fires to be sure to get their air filters checked. It’s probably a good time to mention some other air flow components that affect your BMW or MINI’s performance.

Mass-airflow sensors, typically referred to as MAF sensors and the Positive Crankcase Ventilation or PCV valve both affect your BMW and/or MINI performance and they are directly related to air flow. The PCV valve was one of the earliest emission control devices and it does a great job of reducing engine hydrocarbons, (when it’s operating properly). Either one of these components, if they are not working correctly, will illuminate your check engine light, (or the service engine soon light in some model/years of BMW’s).

Restricted air flow may be one of the less thought about issues when it comes to your BMW’s performance. You’ll want to get an appointment asap any time that your check engine light turns on. The various components and systems related to air flow should be inspected and maintained as needed for good fuel efficiency, good performance, and maybe for passing one of those pesky smog inspections.

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