Mass Air Flow Sensor - Cool Weather [Archive] - Bimmerfest - BMW Forums

: Mass Air Flow Sensor - Cool Weather

Ron Dunn
01-20-2008, 03:45 PM
I am experiening the same problem that is documented in one of the other threads in this forum about 2007 x5 acceleration problems.

After having done a bit of research, I've seen where BMW owners of other series (and other model years) have reported similar problems and found that they had faulty MAF Sensors. Although they weren't "throwing a code", once the MAFS was replaced, the problem was fixed.

My question is whether or not temperature changes, particularly the cooler temps brought on by winter, could have any impact on a MAF Sensor? Anyone have any thoughts here?

Big "J"
01-21-2008, 06:27 AM
From what I understand MAF sensors should be cleaned as often as you change your fuel filter. It's easy to do and you can buy MAF cleaner from the auto store. Cold weather may cause the sensor to gather build up faster but again it can be simply cleaned and that may fix the issue.