Was headed to work this morning on the highway, X was driving fine. Went to pass a car and when I hit the accelerator, the X shuddered - felt like I was driving on rough pavement. SES light comes on. I make it to my exit and pull into a gas station. Get out of the X to look around and listen - nothing. Look under the hood - nothing. Get back in, SES light is gone. Did not happen again the rest of my trip (~ 40 miles).

Any idea what this might have been??

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2001 X5 3.0i (PP/WP/AP) Traded at 213K miles
RARE White on Black - Why does everyone get Tan??
First E53 with 215s on XOutpost!!