Elevation change is a couple psi at best. The main effect is boiling temps are changed but should not affect much in the car.

@ OP: are you sure it has to do with elevation? Is it possible just a particular patch of road causes it and the elevation is coincidental?

Why I ask is that when control rod joint fails the very best feedback is that on certain parts of certain roads you will get steering wheel shake out of the blue. When wife’s went there was a particular part of I-94 for about 1/2 mile caused wheel shake 100% of the time and was the only time.

About a month after that started then finally the 50-40 gentle braking it kicked in.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)