Question about 2000 BMW M Series
The only thing I can think of that would happen at time intervals that far apart is the air conditioning compressor kicking on and off. The idle air control is supposed to compensate for this to keep the RPM steady, but if you have an air leak in the intake tubing, or dirt in the air valve, I can imagine that it might be more noticeable. My theory would be consistent with the fact that you don't notice it at highway speed when the engine is pulling harder and running faster. I would not worry too much about it.
Posted on May 27, 2011
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Posted on Jan 02, 2017
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