Quote:
Originally Posted by XXX555
I have normally noted a stiffer, less travel brake pedal just before starting a vehicle and for a second or so thereafter. I'll check my X35d this am. Do you notice the difference just before and after starting the engine?
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Both times before starting. After engine starts everything is fine. I did the old vacuum test by pumping the pedal before starting until completely stiff (by the way it holds a pretty good vacuum.) then starting the car, driving for a bit, then shutting it off. After ten minutes testing the pedal while engine is still off. Everything checks out. Just those two instances. May be the car does this for a specific reason under certain conditions as others have suggested.